Posts Tagged ‘gps’

Why Do You Think That This Is A Reasonable Trade Off For Safety Or Privacy

Sunday, June 26th, 2011

Not knowing how to protect one’s own privacy can expose the user to unnecessary dangers. One of the hottest technologies is the GPS, and it is now being used in cell phones and cameras. This has enabled people to locate unfamiliar places and establishments. However, privacy concerns have been raised because of the undefined limits on the use of this tracking technology. New models of cameras and phones are now fitted with GPS. Users enjoy its features from simple photo taking to uploading on the internet.

Critics presented their main point of unease as to the risk involved. Anyone can have access to the user’s location from cell phone data. Technology has enabled many phones to store complete records of where a person has been. Using this data with Google maps, the phone owner’s location data can be easily traced, together with how long he or she stayed in there.

EXIF data, which means Exchangeable Image File, is used to store photos in GPS-enabled phones or cameras. This new annotation is embedded in almost all present-day cameras. By using EXIF, information such as shutter speed, F number, exposure compensation, ISO number, date and time the image was taken, and other information, can be saved. These however, are just information about features of the stored data and do not create issues on privacy. It is the capability of some cameras using EXIF to store GPS information on the photo that raises the alarm.

Apple and Google have made public their belief on the privacy subject. According to them, users should not pass on the accountability of protecting their privacy to others. Even if the technology is there, users still have the final choice of whether or not to use it. Users can basically disable or enable GPS features in their phones. Google also made clear that identification numbers of each phone signal cannot be traced to a specific handset. Google assigns a exclusive signal for each handset as part of each policy.

Some groups of users have contradicted the idea of turning off GPS features. They say that GPS is such a useful technology that ignoring it makes one less smart since there are lots of new apps that are location enabled. These groups believe that setting aside this feature on one’s phone will render it “useless”.

One useful way of resolving the matter is to set limits on the use of GPS data. Phone users and manufacturers can also hope that the government can do as much to catch up with the fast-changing technology. Meanwhile, users have to make sure that they can shield their own privacy.

They can do this by setting sound limits on the sharing of data online, in particular with GPS enabled photos. One should use his or her intelligent discretion regarding when to distribute photos on any website, particularly social networking sites. This will make one in better control over his or her privacy.

It’s not just phones that can give away your location. Every time you access the web you are letting others know where you are. To surf anonymously us an encrypted proxy to mask your location.

How Do Car GPS Navigation Systems Work?

Sunday, June 12th, 2011

Contemporary auto navigation units are truly fantastic. Have you ever considered acquiring one? People who do not have or have never had a contemporary auto navigation system, or GPS (Global Positioning System) as it is also called. will probably not realize just how much information they supply. It is no longer merely an item to stop you from getting lost whilst you are travelling from A to B.

Far from it. Modern GPS systems will tell you whether you are passing monuments, sites of historical importance or beauty, churches, hotels, restaurants, pubs, garages, petrol pumps, airports and practically anything else that you want it to inform you of. They have moved on from being only an on screen map to being a travel guide and much more..

If you are thinking of acquiring a GPS auto navigation system, it is worth learning a bit about how they operate, so that you can better understand what they do, what they are capable of doing and how they do it. This is helpful information for when it comes to deciding which system to opt for, because not all GPS systems are the same and some present more features than others.

All car GPS navigation devices use satellites to help them work out their location. (This is not always true of ships, because some water ways use land-based tracking stations).

The GPS is like a radio receiver, so it picks up signals from overhead satellites and processes that data in order to determine where it is. In order to do this job in the right way, it requires the signals from three satellites.

This is called triangulation and is very accurate, often to within a metre or a yard. However, in order to make certain of even more accuracy, the data from a fourth satellite is used as a check. There is very little scope for error if four satellites are being used for pin-pointing a location.

A GPS device will tell you which way to go and if you go off route, it will advise you the best manner for getting back to the right road. However it will also do more than that. Before you begin out on your journey from A to B, you have to type in those two locations.

The GPS will then ask you whether you want to go by the quickest road, the most scenic route or whether you would like to avoid motorways altogether.

This is a great role, but it can do more than that too. If you sort in the name of a restaurant along the way or a monument you would like to see, it will steer you from A to B via your place of interest.

One last item, be sure that the device that you purchase is upgradeable. Some are upgraded automatically, but you have to pay a monthly or annual fee. Others will sell you an upgrade which you have to install yourself. If you are comfortable with making your own upgrades, all well and good, but just be aware that systematically upgrading the software is vital.

Owen Jones, the author of this piece, writes on a number of topics, but is now concerned with how to get Stapletons tyres. If you would like to know more, please visit our web site at Car Tyres For Sale.

RFID Tags And Shopping

Friday, May 13th, 2011

Radio frequency identification or RFID is an old concept that has quietly become a large part of everyone’s life. RFID has been around for at least 90 years and was initially put into practice about 70 years, but not many people realized it. These days, you yourself are most likely scanned every day by an RFID reader and the things you purchase are certainly scanned at least once a week.

So what is RFID? Well, you can think of it as the update of the bar code although in fact, it is older than the bar code by 50 or 60 years. Bar codes were developed in order to integrate stock control with point of sales processing.

Everyone has seen this and is used to it: the sales clerk at the cash register takes the goods from your basket one at a time, looks for the bar code, flashes a light or a bar code reader over it and the cost of the article is added to your receipt.

What you do not see is that the computerized stock records for that item are lowered by one and the sales price is noted along side it. That procedure worked well for 40 years, but now there is a need for more information to be recorded than a bar code can accommodate and there is requirement for more stock control and even more speed at the check out. Nobody has any time any longer.

Enter RFID, an old technology brought back to life. RFID is the technology that they used to put in Second World War aircraft in order to identify friendly aircraft to the RADAR-controlled anti-aircraft guns. The same equipment, basically, that they still use in aircraft today to identify it to air traffic control. The difference is that until pretty recently, these radio signal emitters or transponders were as big as a suitcase and cost a lot of money.

These days they are the size of the tiniest coin in your change and cost about five cents. They win over the bar code because they can hold loads of information, like where and when and by whom an article was manufactured; how much it cost and how much it should be sold for; its colour, weight and description; which shelf and in which shop it should be kept on …. ad infinitum. The shop owner can write anything on that tag by means of an RFID printer.

And when it comes to the check out… No more scanning each individual article by hand, because each RFID chip or tag, as they are called in the industry, emits its own data on its own exclusive radio frequency, therefore so long as the RFID reader is within three or four feet of the basket, it knows what is in there instantly. No more emptying, scanning and reloading the basket.

In fact, no more check out clerk. Most people pay with a credit or debit card these days anyway, so as you walk past the RFID reader with your basket, you are scanned; you swipe your credit card through another scanner; if you are happy with it, you authorize the payment and the barrier raises for you to proceed to your car. You only need a check out clerk for the people who want to pay with cash. Cheques are being done away with soon anyway.

Owen Jones, the writer of this article writes on quite a few topics, but is currently involved with the RFID asset tracking. If you would like to know more, please go to our website at Active RFID Management.

RFID Chips: What Are They Good For?

Tuesday, May 10th, 2011

RFID (radio frequency identification) chips or tags as they are better known are the size of the smallest coin in your purse, but they can hold huge amounts of information that can be manipulated in methods that can do fantastic things.

For instance, RFID tags are in most office identity tags and in a few passports, allowing the holder to pass through security quickly while keeping the building or the country secure.

They are a modern version of the bar code. Remember before bar codes and bar code readers? When a shop assistant had to key prices into the cash register, correct errors and look up prices that they could not remember? People do not have any time for that anymore.

It is OK at the newsagents, but picture a teenager typing in your two trolleys of weekly shopping at the superstore every Saturday. You would still be there on Sunday! Supermarkets have thousands of articles and dozens of special offers - no-one could remember that lot.

No-one could, but bar codes make it straightforward and so do RFID tags. Bar codes work well, but they have to be seen to be read. RFID tags send out their information on a unique frequency which can be read out of line of sight. In other words, an RFID scanner does not need to be able to see the tag to read it.

The scanner can see what is in your trolley without you having to unload it and as you pass by that scanner and pay for your things, they are deducted from stock straight away so that the warehouse manger can see what people are buying and what nobody wants to buy. So, if one brand of cat food is selling better than another, the manager will see that on the computer print-out and buy more of that make, thus keeping more people happy.

This use of RFID in inventory control or asset management to give it its more official title, can translate itself into other uses too. An RFID tag can be placed under your cat’s fur or in its collar so that you can find him if he gets lost. The police and the wardens scan stray animals for a tag as part of their routine these days. Zoologists have been doing this with wild elephants, big cats and other endangered species for years. Now you can have it done with your pets also.

Company vehicles, as assets of the business, often carry RFID tags and you can have one placed in your car to aid recovery if it is stolen. Baggage handlers at airports or bus terminals can (and do) use them to avoid lost luggage.

The US government requires RFID tags be used on all vehicles carrying explosives or dangerous substances and have done for nearly ten years. The US military is in fact the principal user of these tags in the world. RFID tags are used to track military assets such as armaments, battle tanks, fuel, containers, guns, you name it.

Some people are anxious about RFID technology. Where is the line between their convenience and their personal information? For example, they do not like getting junk emails from people that have been able to trace the purchases they made with their credit cards.

Owen Jones, the author of this article writes on several topics, but is now concerned with the RFID asset tracking. If you would like to know more, please go to our website at Active RFID Management.

How RFID Tags Can Streamline A Business

Tuesday, November 2nd, 2010

In order to illustrate how RFID tags can greatly sway the fortunes of a business for the better, we shall look at a theoretical case below. Let us take the example of a furniture maker that specializes in supplying furniture to a hotel chain.

This may sound like an example with no relevance to typical small businesses, but in fact, hotel chains are awfully choosy and have no loyalty, so if you can satisfy these people, you can please anyone.

The main requirements of the hotel chain are that orders are met and on time, the quality of the supplier’s goods has already been determined by means of compulsory ISO 9000 quality control and factory visits.

The hotel furniture manufacturer decides to introduce passive RFID tags to follow its items from the point of manufacture to the point of delivery, that is the hotel or its storage area.

Under previous conditions the producer had employed a few people to walk around with bar code readers and clip boards carrying out quality control and tracking the fulfillment of orders.

The problem was that the system was still subject to human error and items still went missing, which lead to management compensating by over manufacturing and over stocking ‘just in case’.

That is a common enough phenomenon., but the difficulties are multiplied when you think of all the separate items of furniture that are involved in a hotel room, bathroom or lobby and if they are kept in a 200,000 square foot warehouse. Items get lost, forklift drivers make errors, people forget to fill in inventory forms, get sick and take holidays.

In short, running a warehouse like this is a nightmare with too much stress on key employees. It sometimes leads to imperfect deliveries or worse, incomplete delivery tickets. Sometimes the order might be complete but the hotel would think it was not because the delivery ticket was incorrect.

If this company were to initiate RFID asset control they could affix an RFID tag to completed sticks of furniture. The tag would say where it is, what it is, whom it is for, when it has to be delivered and what else makes up part of the order. The tag is being read continuously by the warehouse’s RFID readers forewarning when orders are running late or are still incomplete.

Not only that but the tag can say what else has to be manufactured and whether the item itself has passed quality control. It can also tell you which defects someone has found with it. In short, instead of a couple of people walking around the warehouse hoping that they have covered everything, you could have radio sensors analysing every tag in a warehouse the size of a football pitch, reporting back to a central computer where the storehouse manager can have access to real time information, not just the state of affairs at close of business the previous day.

This should enhance the manager’s chance to manage, cut down on waste, ensure complete orders delivered on time and so higher levels of customer satisfaction, which should lead to more repeat orders.

Owen Jones, the author of this article writes on several topics, but is currently concerned with the RFID asset management. If you would like to know more, please go to our website at Active RFID Management.

Communication And Control Using RFID

Tuesday, October 12th, 2010

RFID is the acknowledged acronym for Radio Frequency IDentification. The core of RFID technology is that every RFID chip or tag is capable of emitting a radio signal on a frequency totally unique to itself.

Therefore, every RFID tag must have its own identifying frequency and the RFID tag readers have be sensitive enough to be able to distinguish between frequencies that are only a very minute bit different from its neighbouring tags. The disparity can be infinitesimal.

Therefore, the technology needs to be precise and selective, but not fragile, because the equipment has to be used on the shop floor and by people who are often in a hurry and in weather that may be inclement.

In order for RFID to work, you need a tag, which is an upmarket kind of bar code and a radio receiver, often called a (tag) reader. However, whereas a bar code can only hold a small amount of information and the bar code reader has to be pointed at it, an RFID tag can store much more data and can be read from a hundred yards or more - even out of line of sight.

Passive tags will only divulge their information when required to to by a reader, whereas an active tag is continuously relaying its contents. Clearly, active RFID tags are more costly than passive tags, because they require a long life battery.

These tags can be utilized to track goods from the moment they leave the manufacturer of the items they describe to the in-bay of the vendor. The tags can then be up-dated or renewed and put in the warehouse. Once there, RFID readers can keep management up to date about what goods are where and if the sell-by-date is approaching.

This has implications for the levels of stock that a company needs to hold, the quantity of goods sold cheap because the sell-by-date is too near and for theft, all of which should boost company profits more than paying for the cost of the tags, the readers, the printers and the programmes.

At the click of a mouse, managers will be able to read how much stock they have in real time and if this is all linked to the checkout cash registers, which are the most and least profitable articles. This makes reordering easy . Easy to the point of computerization. For instance, when supplies of the top ten percent of the best selling products falls below 1,000 order 10,000 more. Automatically, no questions asked.

RFID has many other applications too. The principle mentioned above can be applied to farm animals, a call centre’s computers, a fleet of commercial vehicles, an inventory of household items, your pets, your car and even your garden furniture. Some people who work over a boundary are even having them placed under their skin so that they do not have to wait at customs.

And do not forget that criminals on early release are also tagged. It is the same technology.

Owen Jones, the author of this article writes on several topics, but is now concerned with the RFID asset management. If you would like to know more, please go to our website at Active RFID Management.

RFID Tags: Passive, Active And Hybrid

Wednesday, September 29th, 2010

All RFID tags are used to hold and ultimately send data. They can best be thought of as the replacement for the bar code. However, they have significant advantages over bar codes. For example: RFID tags can hold much more data than bar codes; they can be read from further away and they can in point of fact send information, not only store data.

There are three varieties of RFID tags: passive, active and hybrid. Passive RFID tags are the least expensive, because they are less complex. They need to be induced to disclose their data by taking power from an RFID reader. When the reader’s radio waves hit them, they reflect back their data. This is the kind of tag used in goods in a retail outlet or on crates in a warehouse.

On the other hand, active RFID tags have a battery, a transmitter and an antenna so that they are always transmitting. These devices are clearly a lot more expensive and so are used only on more expensive items such as a container, a battle tank, an airplane, on criminals ankle bands or on an animal of an endangered species.

The hybrid RFID tag is capable of transmitting, but it needs to be told to transmit; it has to be turned on by a signal. This signal could be a satellite passing over head. These hybrid RFID tags are also costly, but the battery lasts longer because they are not ‘always on’. These tags have the same applications as the active tags, but are appropriate for use where it is not critical to know where something is every minute of the day: for instance cattle in a field or goats on a mountain.

Passive tags can be attached permanently by sewing them into linings or putting them under skin because they do not have their own power source and do not wear out. This is a cause of anxiety to some people who worry about an invasion of their privacy or the erosion of their human rights.

Active and hybrid tags are most often clearly visible so that the batteries can be replaced as and when necessary. If this is going to unlikely to happen, as in the case of wild animals, the tag can have a biodegradable clasp which will break sometime after the probable life of the battery.

Some uses for RFID tags are on season tickets so that the holder can pass through the style more quickly than a customer paying by cash. It has uses in security; most of the ID badges you see pinned to jackets have RFID built into them so that security guards do not have to stop and question everybody.

They can be put into trucks that repeatedly cross frontiers so that they do not have to stop for identification. They can be placed on windscreens so that, as you drive through a motorway toll post, either your credit card is debited or the charge is added to your company’s monthly account.

Hospitals use them on patients so that they do not lose anyone or mis-identify them. RFID tags are useful in our daily lives but people are worried about criminals being able to read all this information too easily as well.

Owen Jones, the writer of this piece writes on several topics, but is now involved with the RFID asset tracking. If you would like to know more, please go to our website at Active RFID Management.

Asset Management Techniques

Friday, August 27th, 2010

How does one go about taking care of one’s property - one’s worldly belongings? Well, most people keep their money in the bank, store the jewellery in a safe and insure the rest. But insurance is not really taking care of your assets, is it? It is taking care of yourself so that you do not have renew them with your own money.

In the old days, and even now, I suppose in some countries, you would employ a boy to watch over your sheep or cattle or bring them in at night for fear of lions, wolves or thieves. These were an early kind of security guard and indeed wealthy people had and frequently still do have private body guards.

What if you had a substantial office with a hundred laptop computers - laptops because employees had to do field work as well? How would you keep track on all those? A car is another good case in point and construction site plant is being stolen all the time even from under the watchful gaze of (or with the help of) private security firms.

So what can you do? Get dogs? That works sometimes, but they can be poisoned. Get video cameras and passive infra-red movement sensors linked to a control centre? That works and many firms and private houses have it, but it is very expensive.

As a cheap alternative, the police were giving out free pens in the UK, which wrote in invisible ink. The idea was to write your postcode and house number. This ink became visible under a special kind of light. That is fine if you have a suspect or found property.

Bar codes are not practical, the pen is better. It all comes back to insurance or surveillance.

However, there is another technique that is becoming affordable. The concept has been around for about 85 years, but it was too expensive to use on anything less significant than an airplane or a battle tank.

I am talking about radio frequency identification or RFID for short. The idea is the same one that aircraft have been using since during the Second World War - a transponder emits precoded information in response to a demand from an RF reader.

Information concerning ownership and particulars of what the item is can be written to an RFID chip also known as a tag and the tag can then be taped inside the object that it is to safeguard.

There are two varieties of tag: the passive and the active. Passive tags will only reply if information is requested by a reader, whereas an active tag is always broadcasting.

Many entrepreneurs use RFID tagging to keep track of their assets. In the instance of livestock, most cattle are tagged these days. Most big offices have their IT devices tagged as well and we all know that clothing stores have been tagging garments for years, although maybe you did not know what that button was that they were taking off at the checkout.

Individuals are already tagging their dogs, cats and cars and it will not be long before these asset management techniques will be used extensively at home as well. Insurance companies may demand on it.

Owen Jones, the author of this article writes on several topics, but is currently concerned with the RFID asset management. If you would like to know more, please go to our website at Active RFID Management.

AIS On Ships Is Vital To Safe Travel

Saturday, June 19th, 2010

An Automatic Identification System, or AIS, is basically an electronic transponder that is usually installed on a boat that identifies it. This is most common in marine locations. The transponder sends out a VHF signal on a continuous basis that provides information about a ship such as it’s name, type, position, and call sign.

This VHF signal is valuable because it relays information to other ships about its direction of movement as well as well as its speed. As the VHF signals come in, the receivers are able to display all AIS-equipped vessels that are transmitting within a certain range. The system therefore provides a highly valuable service to water vessels in helping to track the progress of other watercraft in the nearby area. This decreases the chances of collision on the waterways. . The data that is received by other AIS-enabled boats is most of the time viewable on a personal computer monitor or positioned as an overlay on a chart plotter. This will help to verify radar readout.

Navigators and crew members who are on-watch depend on it to make important waterway navigation decisions in terms of course and speed. This system also is a valuable tool to help search and rescue operations. The device can pinpoint the exact position of a ship in trouble regardless of weather conditions.

It helps captains adjust their track and speed in adjusting to other vessels on the water. Ships with over 300 tons of cargo & all passenger ships are required by the International Maritime Organization to be fitted with the marine guidance system. Recreational boaters are not required by law to use the technology, but the maritime technology is increasing in demand by those users. Globally, it is thought that this technology is is used in more than 40,000 maritime vessels.

This maritime technology is used primarily to avoid collisions. The tracking does not work alone. VHF radio communications can be limited and considering the fact that every vessel isn’t required to have it, it is not the perfect solution. It is not an automated collision avoidance system as defined by the International Regulations for Preventing Collisions at Sea (COLREGS). In the hands of a skilled captain however, it is one of many tools utilized for safe travel.

Sea captains often need help identifying other vessels in a local area in order to make the best decisions on course. That also does not mean that all additional types of navigational observation is thrown away. There is certainly, of course, visual observation in which the captain will frequently use binoculars to see far away objects or ships. There can also be acoustic observational warnings that a captain must pay attention for such as horns, whistles, or VHF broadcast. Last but not least, there is radar or Automatic Radar Plotting Aid (ARPA) that can offer beneficial navigational information to enhance what the AIS is plotting. Even with all this kind of technology, incidents can even now occur. It is frequently due to time delays and limitations of radar or even just plain human error whenever this takes place. The graphical charts and all the other observational tools must be utilized if water travel is to be safe and AIS is a small part of that.

Visit Automatic Identification System and read more about AIS

An Understanding Of Radio Frequency Id System

Friday, April 16th, 2010

Radiofrequency ID system has existed since the 1940s and has in no way stopped widening its range of use. RFID is a system with numerous components. It has semiconductor transponders, readers, and computer software that allows for continuous data feeds.

An internal circuit and antenna are mounted directly into all RFID transponders. The IC is then set in with an electronic encrypt, distinguishing it from among tagged items worldwide. When the tag proceeds within measurement limit of an RFID reader, data from the tag is dispatched over the antenna to the detector and to the computer system for processing.

RFID strategy was previously applied by armed forces application in WWII. Since that time, it has been exploited in various fields of study and commerce. It became a genuinely efficient piece of equipment in business, travel, and in the tracking of packages.

Though it was viewed simply as a cordless bar coding system, RFID is much better by far. Scanning with RFID transponder stays useful even when barriers stand in between the item and the detector. In addition, these types of transponders can scan an item as much as 90 feet.

RFID is really a self-reliant finding method. This identification method performs free of human administration. Furthermore, it can read several tags at the same time even while maintaining high level reliability in identifying each tagged item.

RFID systems are labeled in two types. The very first type comes from from its storage and retrieval ability: Read-only or Read-write and Passive or Activated superpower sources. The other category depends upon the frequency it makes use of: Low Frequency, High Frequency, or Ultra-high Frequency.

Read-only labels return stored data alone. Distinct information that can be recorded may consist of a product description or tracking program code. These techniques can easily successfully streamline useful manufacturing and supply chain procedures. Individually, read-write labels are usually, on the other hand, fixed to just accept input and display or edit output.

Passively, a RFID reader produces signals for the tag to become operational. Without a scanner in close proximity, the ID could not provide any data. Fundamentally, a passive system is inferior when compared with an active system.

An active system has electric packs constituted in tags to cause transmittal of information between tag and scanner. These devices are more urbane and can easily scan larger ranges. Latest models of these scanning devices also can come with thermal scanners.

More info about AIS Automatic Identification System at Wireless Bar Coding