Categories
Browsers Computers Internet

Is updating Java really important?

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What do you know about Java? If the answer is not much, then you are not alone. In this article I am going to explore exactly what Java is, and why it is so important that you keep it up to date.

Java or JavaScript?

Java and JavaScript are completely different things, however many people confuse them as one and the same.

JavaScript
JavaScript is a scripting language (like PHP and HTML) that is used in browsers to help render websites, and is also now used to create [relatively simple] desktop games.

We use JavaScript on our blog. One example can be found in our comment form; if you don’t tick the box to confirm you have read the comment policy and click Post Comment, a box comes up reminding you that you have to tick it to proceed – that works via JavaScript.

You can disable JavaScript, but so many websites use it nowadays, your browsing experience would be significantly affected.

Java
Java is a programming language, which is capable of doing far more than JavaScript. Java can be used to create new programs and applications that run virtually on their own, or via a browser.

Most computers come pre-loaded with Java, as do many other devices, including some cars, printers, parking machines, ATMs and more. A printer doesn’t use JavaScript, as it is a browser based language.

Malicious Java

It is possible for someone to gain access to your computer via Java. All you would need to do is visit a website with malicious Java code on it, and unknowingly to you, you could be being hacked. Some websites allow you to add your own code to their site, (like forum’s for example) so it might not even be a malicious website you are visiting, just one page which contains malicious code.

Oracle's Java logoWhen you visit a page with a malicious Java application, your browser will usually start to run the code, which will open up a direct link between your PC and the hacker – remember browsing the net is a two way process, every time you request data from a server, the server can request something back.

On face value, a page with malicious Java could look completely normal and trustworthy, as you wouldn’t be able to see the code – your browser would render it for you.

Malicious code can give a hacker almost complete access to your machine, via the internet. They could potentially browse through your files and open applications, and even receive feedback from input devices like a webcam and microphone.

Java Update

When Sun Microsystems (who are now owned by Oracle) developed Java, they didn’t plan for it to be used maliciously, and still don’t. Like with most code, hackers exploit loopholes and flaws in the language, to enable them to perform malicious activity.

Oracle's logoLike with any software, to combat malicious activity, when flaws are discovered, developers create patches and launch new versions to protect uses against their installation being misused.

Many of the know ways Java can be used to gain access to your computer are preventable, if you have the latest version installed.

It is important that you not only keep your computers version of Java up to date, but also your browser’s version. Many browsers come with a Java plugin, and this can become outdated, even if your system version of Java is up to date.

You should check to see if your browser’s extensions and plugins are up to date ideally once every week. If you have Premier IT Support, or your computer is updated by an external provider, you shouldn’t need to update Java, as that should be taken of care for you.

Categories
Gadgets How To Guides

How to get great gadgets on a budget

It’s a very easy – and all too common – mistake to see your student loan arrive in your bank account and rush out and spend it all on the latest must-have gadgets. Smartphones, laptops, tablets, printers, they’re all “essential” to student life, (well, in a social capacity in most senses, but to some they’re essential).

Obviously going off to University is an exciting time and you want to go fully prepared for the academic year, and to make an impression on your new friends and flat mates. But you can do all of this without breaking the bank.

For instance there are some great laptop deals for students specifically which enable them to get the computer they want as well as all of the software they’ll need to help with the course, and even discounts on devices like printers and wireless routers.

When you think about it, you can get what you consider to be brilliant deals on your computer, printer and tablet – to name just three you might buy together – getting discounts on all three, but it can still add up to upwards of £1,000. But one of the advantages of being a student is being eligible for a package tailor made for getting you through the late night group projects and the 10,000-word essays that you finish at 4am.

National Union of Students card
An NUS student card

You might not think that some of the devices in the offers are what you would call “top drawer” or even as cool as what your friend has bought, but if you’ve spent £500 and they’ve spent £1,500, you’ve got an extra thousand left in your bank account to enjoy yourself with while taking the necessary “study breaks”, or to keep in hand for emergencies and all-important food shops. There are only so many times you can buy own-brand beans after all!

Budgeting is a key part of Uni life, something you don’t tend to realise until the end of the year (or the end of your third year in a lot of cases) but anything you can save before you start your first term is going to benefit you later on, allowing you to upgrade your gadgets in the future when you’ve got a little bit extra that you can spend without getting into financial difficulties.

The deals on laptops and other tech for students really are worth looking into. A lot of the top brands produce models and packages designed purely for students at prices made for students. If I had one tip, check them out, don’t just splash the cash on the biggest and best because you want to be cool.

Categories
Gadgets

Exploring arguably essential home gadgets

We all love our gadgets, some people more than others of course – we’ve all got parents or grandparents who haven’t got a clue how to turn a computer on, let alone check their emails or catch up with their family on Facebook. But for the gadget lovers among us there’s nothing better than getting home with a new bit of kit, setting it up and turning it on for the first time. It’s like a birthday and Christmas all rolled into one!

Christmas and birthday in one
Christmas and birthday rolled into one!

But while we all have such affection towards the latest offerings, what would we actually call “essential’? After all, the very latest devices and gadgets don’t come cheap and disposable income isn’t exactly at its peak at the moment. We’re finding that we have to budget more, and even wait until the price drops after a few months before we can get our hands on some devices, an agonizing wait for many I’m sure. So if we had to prioritize our gadgets, what would they be?

Laptop

Of course, you have to have a laptop. Tablets and smartphones are great but sometimes you just need a computer to get certain jobs done as well as they possibly can be with a bigger screen and better all round packages. You’ve got numerous top quality manufacturers to choose between, all offering different packages, with Apple, Dell, HP and co all vying for the title of top laptop manufacturer.

Printer

Obviously, if you’re working on your laptop at home for an important project for work, school, college or University, it’s vital that you have a way to get it off the computer and into a tangible document. For that reason you need a printer capable of producing your work in high quality, something Dell printers for one are synonymous for, while other features can include scanners, photocopiers and fax machine capabilities.

Smartphone

Then when you leave the house it’s vital that you can stay connected to the rest of the world. Smartphones such as the iPhone, BlackBerry and Samsung Galaxy give you the ability to check your emails on the move, update you location to Facebook, look into what Lady Gaga has had to say on Twitter and even buy things, you can do it all while you’re out of the house. Oh, and you can text and make calls too of course!

Tablet

One of the must-have items of the moment, tablet computers such as the iPad are taking the world by storm. On the train, in the boardroom, at the park, they’re all using them as perfect hybrids between smartphones and computers.

Music Player

Finally, of course, you have to have an iPod or similar device to listen to your favourite music on. Whether you’re in the gym, on the train or just relaxing, it’s always good to have some music to keep you in the mood for whatever you’re doing.

These are what I believe are essential home gadgets, but what is your views? Do you consider all these gadgets essential, and if not, which are yours?

Categories
Computers Reviews

Which new printer is best for you?

A printerAs with everything from televisions to cameras to computers, printer technology evolves and improves with every year. Printer manufacturers release new models every calendar year that offer new features, improved capabilities and, in some cases, fixes for problems that have plagued users in earlier models.

In 2012, printers are faster than ever before, providing crisp and clean images and text. Still, they manage to print more quickly and use less ink, making them so much more efficient. Other trends this year include larger formats and wireless capabilities. Here’s a closer look at some of the top printers of 2012, for all possible budgets and printing needs.

HP Envy 110 e-All-in-One

Want a printer that is environmentally friendly while also providing high-quality printing? Then this is your printer. The world’s only PVC-free printer, the Envy inkjet printer, is also Energy Star certified and offers green features like automatic two-sided printing and an ink cartridge recycling program.

In addition to the low environmental impact, the Envy offers quick and quiet printing and produces lab quality photo prints and crisp documents. And in addition to the wireless capabilities, the Envy has built in AirPrint capabilities, meaning you can print from your iPad, iPod touch or iPhone. Best of all, the Envy is affordable, just around $200.

Canon Pixma MX432

Are you working from home? Do you need an affordable machine that prints, scans and copies? Then the Canon Pixma MX432 might be a good option for you.

Costing about $100, this sleek machine does everything you need for a low price. While this inkjet has a slightly slower speed than some other comparable printers, it provides excellent photo printing and includes wireless and AirSoft capabilities for convenient printing on the go.

HP Officejet Pro 8500

If you need fast and high-quality printing plus the capability to scan, copy and fax, then this is the model for you. One of the most user-friendly printers on the market, it boasts a large LCD screen that allows you to set your preferences with just the touch of a button.

For an inexpensive all-in-one (this model runs just under $300) the HP Officejet prints quickly, with about 15 pages per minute in black and white, 11 pages per minute in color, both with professional-looking resolution and quality. The drawback to this model is that it does not have wireless capabilities, but you can scan directly to e-mail or print from a memory card.

Epson Artisan 835/Epson Artisan 1430

If you print lots of photos at home, then the Epson Artisan 835 is definitely a printer to consider. Unlike other inkjet printers that use four color ink cartridges plus a black cartridge, the Epson uses a six cartridge system.

The two extra ink colors, light magenta and light cyan, allow the Epson to print photos with a greater range and depth of colors, meaning that your snapshots look professionally printed. This printer is more than adequate in other areas as well, providing crisp black and white printing at nine pages per minute, plus scanning, faxing and copying capabilities. This printer costs around $300.

If you would rather have greater photo printing capabilities than multiple functions, consider the Epson Artisan 1430. This printer is geared toward the photographer, printing gallery-worthy prints up to 13” x 19”. With a price tag of less than $300, this printer is far more affordable than other wide format models, making it the ideal choice for amateur photographers or craft enthusiasts who want to print larger photos and documents.

The Artisan 1430 also includes wireless capabilities, plus Epson Connect, which allows you to print from your smartphone, tablet or other mobile device.

Printers have come a long way from the slow and inefficient dot matrix models of the early days of home computing. The best model for you depends on how you plan to use it; if you plan to print mostly documents, look for a model that prints quickly and efficiently, while a photo printer should provide high-quality color prints.

If you take lots of photos or do work on a mobile device, choose a compatible printer that allows you to print directly from your device. Test a few models, compare the quality and make the right printer decision for you; if nothing else, there will plenty of new models to choose from next year.

Categories
Computers How To Guides

The causes and how to fix lines on printouts

If you own a printer, chances are you’ll experience some sort of trouble with it at some point, if you haven’t already. One of the most common ailments plaguing printers is horizontal lines across the page – lines you didn’t ask to be there.

The good news is that there are several steps you can take to try to cure this problem before having to call in a professional or replace the printer entirely.

Basic Causes and Fixes

Fortunately, most fixes for horizontal lines fall into this category. It’s always a good idea to start with the simplest, easiest remedies before taking more drastic measures and risking further damage.

Ink level is low
This is one of the most common reasons unwanted lines appear on printouts. If your printer is running out of ink, simply replace or refill your ink cartridges following the manufacturer’s instructions and recommendations.

Often new printers come with ink cartridges that are either low on ink or have ink cartridges that have dried out from lack of use while sitting on the shelf. If you’ve just purchased a new printer, double check the cartridges that came with it.

Settings are incorrect
It can make a big difference in the quality of your printout if your settings are not correct. Check the following:A woman with a hammer about to hit a printer

  • Paper type – Make sure the paper type selected matches the paper you are actually using. Printing photos and the use of photo paper is especially affected by incorrect settings.
  • Print quality – Settings usually offer a choice between Draft, Normal and Best. Select the highest quality possible.
  • Color or black and white – Select “Color” printing even if you are printing a document that is only in black and white. While it may seem counterintuitive, some printers that have separate color and black and white cartridges use ink from both cartridges – even for black and white documents. Choosing the “Color” option will often fix horizontal lines appearing in black and white printouts.
  • Speed – Turning off high speed printing mode often eliminates unwanted lines.

Test, clean, and align
Part of good printer maintenance is periodically running your printer through a cycle of test, clean, and align – even when there aren’t problems. This helps keep the printer operating smoothly. It’s also a good basic step toward resolving problems with your printouts.

Troubleshoot
Most printers have a troubleshooting option. Go ahead and run your computer’s troubleshooting program for your printer. Windows users can reach this through the Control Panel, while Mac users go through System Preferences.

Read the manual
If you haven’t thrown out or misplaced your printer’s manual, it can actually be helpful to take a look through it and check for helpful hints. Manuals also usually have their own specific troubleshooting guides – as well as a tech support hotline.

Defective cartridge
Once in a while, an ink cartridge is simply defective. If the printer is working and you’ve tried everything else, you may just need to replace the cartridge.

Advanced Causes and Fixes

Unfortunately, there are times when the basic fixes just aren’t enough. These fixes take a bit more time and effort, but they can ultimately save you the expense and hassle of either having your printer repaired or purchasing a new one.

Clogged/dirty print head
If the horizontal lines on your printouts are black or in color and are not simply streaks where ink is missing, a clogged or dirty print head is a likely culprit. There are several methods of cleaning print heads, depending on the make and model of the printer. It’s always best to check with the printer’s manufacturer for the recommended method. However, there are some do’s and don’ts that apply regardless of printer brand:

  • DO unplug the printer and remove the ink cartridges before cleaning the print head.
  • DON’T use tap water to clean the print head. Most inks are water soluble, so purified water is effective and relatively safe to use for cleaning. However, tap water can contain minerals and other impurities that can damage the print head.
  • DO use distilled water to clean the print head.
  • DON’T use compressed air to blow out print heads or nozzles. These parts are delicate and can be damaged by compressed air.
  • DO consider cleaning the backside of the print head assembly if cleaning the print head alone does not resolve the problem.

Defective print head
If after cleaning the print head assembly there are still unwanted lines, the print head may be defective and should be replaced.

If All Else Fails

Sometimes there’s truly nothing to be done except to either take the printer in to be serviced or buy a new one altogether. If it comes to that after trying the above fixes, at least you’ll know you did everything possible first.

Categories
News Technology

3D printing – a revolution on the horizon?

What an achievement, this is my (Christopher Roberts’s) 100th post on Technology Bloggers!

Thank you everyone for your support, I love writing here, and that is because of the fantastic community we have created 🙂

3D printers have been around for around 20 years now, however it is only recently that they have really started to show their true potential, both in industrial and now even domestic settings.

Thanks to the recent advancements in 3D printing, CAD designs can be constructed into physical prototypes (and in some cases now even final products) by 3D printers. 3D printers have the potential to revolutionise the way we live our lives, due the variety of possibilities they unlock. 3D printing could revolutionise architecture, product design, industry, education, and so much more!

What exactly is 3D printing?

Most people have access to a normal printer, be it black and white or colour, ink jet or laser. Those sorts of printers however, only work in 2 dimensions, they can print content in the dimension that is left to right, and the dimension that is forward to back. 3D printing adds in another dimension, up and down. Therefore 3D printing means that you can print in height, length and breadth.

Why is 3D printing important?

Some critics have speculated that 3D printing will be as big, if not a bigger revolution to industry, and the way we live our lives, than the internet was. The internet has opened up so many opportunities, but it is believed that 3D printing, could possibly open up even more!

For architects, it will mean that within minutes, they will be able to print on screen prototypes of buildings, so they have a tangible product to show the customer, in virtually no time at all!

For retail, 3D printing could mean that shops hold no stock, and products (less complex ones at first, but branching out in the future) could be made to order, on site! No longer would shops be out of stock, so long as they have material to print on, they can make new products, there and then.

For healthcare, the new printing capabilities will mean that body part replacements can be accurately measured, designed, and then printed. Yeah, printed bones! Just last month, it was publicised that the first 3D printed jaw had transplanted onto the face of a woman from the Netherlands. The jaw was matched to the shape of the patient’s original jaw, using CAD modelling, and then layers of titanium powder were melted into shape by the powerful lasers that make up the 3D printer.

How do 3D printers work?

Different 3D printers work in different ways. Some work by building the object slowly, layer upon layer in an upwards direction, whilst others work by cutting down into a material. The titanium jaw example from above was built by building upwards creating layers upon layers of material, from titanium powder fused together by laser.

What materials can be ‘printed’ on?

Currently you can ‘print’ on plastics, metals, ceramics, glass, and even certain malleable foods (such as sugars and chocolate). In the future that selection of materials is likely to be expanded, and some even believe that we could grow human bone, and then 3D print replacements – that is still a way off at the moment though!

Could you get a 3D printer?

Many firms are looking to capitalise on the decreasing cost of 3D printers, so much so that some companies are now offering (simpler) domestic versions for home use!

One firm selling 3D printers to the domestic market is the New York company MakerBot. Makerbot are offering a basic 3D printer, which can create plasic objects using CAD software, for $1,749 (around £1,100).

MakerBot's 3D PrinterIn an interview with the BBC, MakerBot’s chief executive Bre Pettis, claimed that the printer is “a machine that makes you anything you need” which is “handy in an apocalypse or just handy for making shower curtain rings and bathtub plugs.”

Mr Pettis also said he hoped to get his printers “into the hands of the next generation because kids these days are going to have to learn digital design so they can solve the problems of tomorrow”.

Another company, (called 3D systems) is offering its ‘Cube’ 3D printers at a similar price to Makerbot, marketing it as a tool to express your creativity. The company is currently working on an app that will allow users to use the Microsoft’s Kinect motion sensor to create objects, simply by moving their hands through the air!

3D Systems 3D printer - Cube
Some of 3D Systems ‘Cube’ printers, prining 3D objects

3D printing is bringing to the global market a fast and increasingly affordable way of turning ideas into reality. No longer will the joys of flexible design be limited to those with CAD jobs and the luxury of a prototype department. There is now a big incentive for people to learn CAD techniques and how to use CAD software. Many countries are now investing in 3D printing technologies, as they can see the potential; IT jobs in the UK and abroad are likely to see big benefits from this.

3D printing is real, and it is here.

So, what do you think about 3D printing, will it revolutionise the way we live our lives – even as much as the internet did? Or do you think that it is a waste of resources, and that it will never really be cost effective enough to be used on a mass scale?

Categories
Business Gadgets Technology

Technology and the future of work

Technology is always changing and advancing the way we live our lives, unless you are a luddite and live in an Amish community that is! Some people oppose technological change, and I respect them for that, but personally I embrace it – techie all the way!

Technology is likely to improve the way we do business significantly in the near future, but how? In this article I am going to write about some of the latest and greatest technology which is going to revolutionise the way we work!

Portable Laser Keyboards

Okay, so you may be thinking that we already have keyboards that are pretty portable, you can get role up ones that you can take almost anywhere. The problem with these is of course, they do take up space, and often they cannot connect to your smartphone or tablet.

The future solution to this problem is already here: The Magic Cube. The Magic Cube is a super portable wireless laser keyboard, which has been developed by a company called Celluon. It is basically a little box which can project a laser keyboard onto any flat surfaces, and then works out what you are typing by where your fingers break the lasers.

A wireless laser keyboard called the Magic Cube
The Magic Cube – a wireless laser keyboard

This is no ordinary keyboard though, it can connect via Bluetooth to most smartphones, laptops, tablets and desktops, so wherever you are, no matter what your device, if you have your Magic Cube, you have a keyboard!

Hand Motion Technology

In the very near future, we will be able to control screens using our hands, and not by touching the screen (that technology already exists) but by simply waving a hand in the air.

The 2002 film Minority Report featured futuristic hand motion technology where detectives could push images off to the side and bring up more content just by waving their hands in the air. This was in the movie, because the film makers heard that the technology was being developed.

Better Integration

In the future we are likely to see much better integration of all technologies. Mainly thanks to the likes of cloud computing and improvements in wireless technology, it should become easier and easier to transfer files from device to to device.

Apps

Smartphones and tablets have and are still revolutionising the way we do business. Smartphones and tablets have significantly improved the way we do business and communicate, but it is the apps that you can download onto them that are likely to significantly change the way we do business in the future.

We already have apps that can scan and store your business cards, store details on your asset and save your important documents, but in the future you can expect many more effective, impressive apps. Some examples of apps which we may see developed in the future (or that are being developed now) are the likes of more powerful, real time translators, high performance graphic design apps, apps which make paying, transferring and receiving money much easier, human quality text to speech apps, and many more.

QB Robots

A US based company called Anybots have created a very cool little robot called QB, which uses the latest in wireless technology to create a portable webcam, so when conference calling, you almost feel as though you are in the room (thanks to your movable position) with your colleagues.

Anybots QB Robot
The head of one of Anybots wirelessly controlled QB robots – notice the webcam eyes and screen inbuilt into the head

The robots have freedom of movement, so they can go anywhere in the office. On the head section of the QB, there is a webcam, so that you can see what the robot sees, and a screen, so you can be seen by those in the office.

QB means that you can be anywhere in the world, and yet still check up on those in the office, meaning that working out of the office is so much easier than ever before! QB could also help to significantly reduce the costs to businesses of travel, as fewer employees will need to be on the move.

3D Printing

3D printing is a new technology, which some critics say will be as big a revolution as the internet! 3D printing will allow firms to print products to order in store, bringing huge savings to firms in terms of transportation. Some predict that by the end of the decade, 3D printers will be a common household object, where we can print things, in 3D out of a whole range of different materials. I plan to write an article in the near future about 3D printing, so stay tuned!

UPDATE: I have now written that article, and it can be found here: 3D printing – a revolution on the horizon?

So, the future looks very exciting, but what do you think of it? Have you heard anything that I haven’t?

Categories
Computers How To Guides Technology

Selecting the most suitable printers

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There is now an extensive range of different printers on the sites of suppliers like Ryman, and this range of choice can sometimes make the selection of the best model seem a difficult task.

As with so many other tech purchases, the way to zero in on the right printers is to first start by establishing the detail of your regular needs.

With printers, this understandably amounts to the type and frequency of the intended usage. Both of these factors have a bearing on spec of suitable printers, which in turn influences both initial outlay and ongoing running costs. Here we look at relative benefits of the most common types of printers.

Laser printers were formerly an expensive option, for business rather than home use, but costs for this technology, as with so many things in the IT world, have dropped over the years.

Those looking to produce a large volume documents will be happy with the excellent print quality of text produced by laser printers. Ongoing running costs are also low, with the relatively expensive toner cartridges lasting a long time, and commonly averaging a running cost of about 1p per A4 sheet. In contrast, inkjet printers can cost as much as 5p per sheet.

However, laser printers designed for the home use market do not usually come with the auto-duplexing function, which allows the automatic printing of both sides of the paper, and so aspiring novelists on a budget should perhaps be aware of this fact. Colour laser printers are a bit more expensive and limited in the quality of colour image that can be produced – they are not really recommended for those looking for a home photograph printer.

A PrinterInkjet printers are still the most popular for home use. Many inkjet printers can produce excellent quality photo prints and other high definition images, in full colour. Standard or entry level inkjets will perform just this function, and can be picked up inexpensively, although as mentioned can become costly if a large volume of printing is required.

For home office use, many choose to spend a little more on an integrated unit. All-in-one inkjet printers can scan, copy and print, and often fax. These kinds of inkjet printers will understandably cost more initially, but will have similar running costs as more basic models. One point to note with the integrated, all-in-one inkjet is the size of the unit, which is usually considerably larger than the standard type, and can eat up limited desk space.

While cheaper than laser printer toner cartridges, fresh ink cartridges or refills for inkjets will be required more frequently. This can get expensive, especially if a lot of high definition colour images are printed. Producing draft quality prints when definition is not an issue can go some way to reducing ongoing usage costs, and this is particularly viable when printing text.

Categories
Computers Technology

Why do printer cartridges have chips?

Why Do Ink Cartridges Have Chips?Many of you reading this blog will have a printer next to you as you read this and you will also have probably bought an ink cartridge at some point. But have you ever wondered why a lot of modern printer cartridges have chips?

Well first of all let’s have a look into what types of cartridges have smart chips. There are two types of cartridges: Ink Tanks and Ink Cartridges.

Ink tanks are those that just there to hold the ink, they don’t usually have any circuitry, they just plug into your printer and the ink gets fed to a print-head. Ink cartridges usually have a print-head built in and are sort of the ‘all-in-one’ of the printer world.

It is the printer cartridges that have print-heads built in that usually have chips or circuitry on them. They do so for a number of reasons…

Printer Cartridge Smart ChipPrimarily in this type of cartridge they are used so that the printer can communicate with the built in print-head and are necessary for the printer to work. As well as this they communicate other things to the printer such as ink levels.

This is were a lot of people run into trouble, it can be very frustrating when your printer starts telling you that the ink levels are low but in fact you know that there’s still some juice left in there! This is due to the fact that the cartridge doesn’t actually know how much ink is in the cartridge, it just counts down how many pages you have printed.

Another way the chip is used is to, in some cases, stop the cartridge being re-filled by third party companies. Some manufacturers just simply don’t like people re-using their cartridges as this usually means a loss for them, so once one of their cartridges runs out of ink, the cartridge will remember that it has no ink in even if it has been re-filled.

So that little chip on the bottom of your cartridge does a lot really… both good and bad. If you wish to learn more about printers and ink have a look at the blog of the firm I work for, which can be found on our printer cartridge site.