Archive for the ‘Hardware’ Category:
Written on January 26th, 2010 by adminno shouts
These machines so really to help us when we need a cash money, and now we’ll be easy to found these machine at most supermarkets, convenience stores and travel centers. Did you have think about the process that makes your funds available to you at an ATM on the other side of the country?
ATM is a simply a data terminal with two input and four output devices. Like any other data terminal, the ATM has to connect to, and communicate through, a host processor. The host processor is analogous to an Internet service provider (ISP) in that it is the gateway through which all the various ATM networks become available to the cardholder.
Most host processors can support either leased-line or dial-up machines. Leased-line machines connect directly to the host processor through a four-wire, point-to-point, dedicated telephone line.
Leased-line ATMs are preferred for very high-volume locations because of their thru-put capability, and dial-up ATMs are preferred for retail merchant locations where cost is a greater factor than thru-put. The initial cost for a dial-up machine is less than half that for a leased-line machine. The monthly operating costs for dial-up are only a fraction of the costs for leased-line.
The host processor may be owned by a bank or financial institution, or it may be owned by an independent service provider. Bank-owned processors normally support only bank-owned machines, whereas the independent processors support merchant-owned machines.
Settlement Funds
When a cardholder wants to do an ATM transaction, he or she provides the necessary information by means of the card reader and keypad. The ATM forwards this information to the host processor, which routes the transaction request to the cardholder’s bank or the institution that issued the card. If the cardholder is requesting cash, the host processor causes an electronic funds transfer to take place from the customer’s bank account to the host processor’s account. Once the funds are transferred to the host processor’s bank account, the processor sends an approval code to the ATM authorizing the machine to dispense the cash. The processor then ACHs the cardholder’s funds into the merchant’s
bank account, usually the next bank business day. In this way, the merchant is reimbursed for all funds dispensed by the ATM.
Written on January 25th, 2010 by adminno shouts
Almost all computer users know the term Memory and Disk Space, but many of them mistakenly interpret these two terms, many of them interpreted as a long-term memory and short-term memory.
Memory or RAM stands for Random Access Memory and is known as volatile or temporary memory types. This can be used to store new information, just like you when trying to remember something for a minute.
On the computer, this is biasda happens when you save the document before closing it. When you save a document, its contents are transferred from RAM (temporary memory of the computer) into the hard disk (long-term memory of the computer). If this process is disrupted by power failure, cancellation by the user, or some other things, the contents of this document are “missing”. This is similar to what happened when we were sorting important, keeping valuable information from our short-term to long-term memories.
Disk Space is a space on your hard drive, where the applications you use on your computer is stored. When you open or run the program, this program will take from the disk into your computer RAM, and the program instructions and then run from RAM. Computers can only process the instructions in RAM. Therefore, for each program to be executed, must first be loaded from the disk into your computer’s memory. RAM is also used when we create documents and pictures or other files.
RAM is volatile memory, would “wipe out” when we turn off the computer or if there is a power failure. If the information is “erased” in RAM, this is not saved and the computer does not have a record of the existence of such information ..
Every time you type a new document, whatever you type at first stored in RAM. But, since RAM is volatile or temporary, if you want to keep what you’ve typed, you need to save your document. When you remove the Save command in your application, the information you have that type of RAM will be transferred to the hard drive and stored in a file.
As you can see, the memory (or RAM) and disk space related. They depend on each other for your computer to operate properly. When you use a computer, application and transfer of data from disk to RAM when needed. This data is then manipulated in RAM. The contents of the RAM should be kept back any changes back to the hard disk. If not, anything in RAM is not saved will be lost.
Data or files on a disk can be deleted, too. When a user “delete” a file, whether it is operating system files or files from your favorite application programs such as MS Word, iTunes, or a graphics program used to edit images, files are not really erased. Instead, your computer simply marks the space available and the program or remove material that is inaccessible to users.
When the computer needs the space program or document removed once claimed, then the space is replaced with the new information. However, if the files deleted the old space is never needed by the computer, the material remains on the hard drive. This realization has given birth to a forensic computer science as the material is obtained if you have the proper equipment and be able to access the hard drive storage space with special programs aimed to retrieve deleted files.
Written on January 12th, 2010 by adminno shouts
The development of static and dynamic RAM integrated circuits followed swiftly in the late 1960s and early 1970s. Compared to the relays and vacuum tubes used for computer memory function prior to the development of the magnetic core memory models, the advancement created a more user friendly experience as well as an increase in the amount of memory a computer could be expected to produce. This precursor to the common personal computer revolutionized the technological world since it made it possible to begin to see the advantages of the computer for personal use instead of being seen and used only in business operations. The computer systems of today boast a hierarchy of memory that includes CPU registries, SRAM caches, external caches, DRAM, and swap space among others. This is often referred to as RAM, but it actually defies the original concept of true random access memory and does not hold the same intent as the original magnetic core memory from which RAM was born. The methods utilized by the pool of memory in today’s computers often sequence through various subsystems with different access times in layered sequential order to allow the illusion of instantaneous response times. Generally, the computer accesses its memory in order of speed with the slower forms of memory being the last to be drawn from when a command is given to the computer. RAM now has methods of upgrading that allow for even greater memory capacity if there is a need to change the amount of RAM a computer has based on the amount of RAM used by the operator on average, these are usually in the form of DRAM and come in the form of memory modules. A few sticks of chewing gum are comparable in size to the memory modules in terms of physical size. These modules can be replaced quickly in the case of damage or should the amount of memory need to be increased again at a later date. Small amounts of RAM, most commonly SRAM, are also found in other locations on the computer, such as the mother board or the hard drive. Developers are currently investigating the possibility of non-volatile RAM. This would be another huge step in computer memory as these new forms of RAM would allow for the preservation of data upon the loss of power. Currently, RAM is a volatile memory form and will lose information if an interruption of power occurs. Carbon nanotubes offer promising results in this field of RAM development, but no non-volatile RAM has been released for public use yet. All of the developing technologies under this direction of RAM are pre-beta stage at present. MRAM has seen some success with the release of several chips that have undergone extensive testing. The core technology of MRAM depends upon the concepts of the magnetic tunnel effect and is promising to turn the world of computer memory onto the pathway of the future as a result. In 2004, Solid state drivers became available. Bases on flash technology, these drivers have a capacity exceeding 150 GB. These drivers also have speeds that far exceed the speed of traditional disks. In short, this means that the lines between RAM and disks have blurred and there is less difference between the two in performance. With each passing year, memory capacity grows. New technologies revolutionize the way we think of computer memory and how we use that memory once it becomes available. It is expected that computer memory will only continue to increase and evolve as our world becomes more technologically advance.
Written on December 19th, 2009 by adminno shouts
BIOS abbreviation for basic input/output system, is a firmware code that a PC runs at start up to identify and initiate component hardware. This enables the PC to allow software programs to load, execute, and run for user use. More commonly known as booting up, BIOS simply enables a computer to work for the user in a capacity that is expected. It is referred to as memory only because it usually resides embedded within chips which use ROM as a main memory function. Part of the non-volatile memory formats, BIOS is not lost due to power loss or shut down.
In the beginning, BIOS chips could not be altered because of their placement on ROM and PROM memory. Then, the BIOS moved to EEPROM and flash, giving it more functionality than had been previously seen. The EEPROM gave the user the ability to easily change and update the BIOS. Manufactures issued updates to help users improve compatibility and remove bugs that were often troublesome to the applications in question concerning the BIOS in the same manner that updates are offered for many applications and hardware components of a PC. Since the issuance of these updates ran the risk of destroying a computer if the updates were interrupted by the user or otherwise, manufacturers altered the BIOS to include a block that must run separately and be upgraded before the rest of the blocks. This fix seems to have reduced the risk to computers while upgrading BIOS nicely.
As BIOS is flash-based, it shares the same risks that other flash-based memory experiences. Flash can only be rewritten a finite number of times before becoming unusable. Flash-burn viruses that occur after too many rewrites on the flash device will result in permanent corruption and the BIOS will be unable to be salvaged. The only true way to avoid having this happen is to replace the flash driven BIOS with a ROM based BIOS.
While some older, less sophisticated operating systems accessed the BIOS chips within the personal computer directly, more advanced systems access the BIOS indirectly. The main reason is that it is inefficient with today’s more complex and faster technologies. Accessing the BIOS directly can seriously delay speeds which are valued in today’s business and personal worlds.
If a process in the boot series of execution occurs from BIOS due to a forgotten disk in left in the hard drive, a user will get an error message. The message may vary from operating system to operating system, but all error messages will have one common fix. Simply remove the forgotten disk from the hard drive and reattempt your boot. The reason for this is that BIOS can accidentally attempt to boot your computer from incorrect files if such an occurrence as a forgotten disk is present. By removing the interfering disk, such as a floppy or installable application disk in your hard drive, and rebooting the computer after removal of the offending software, BIOS can continue the process without confusion.
No computer can run without BIOS. It is an integral part of unseen system checks that occur when the computer is started. If the system cannot check itself for possible problems and have its commands properly executed by BIOS, then the computer will halt booting executions. Based on this, and the knowledge that BIOS is generally flash based (although it can be ROM based), if your computer refuses to start, you may want to have your BIOS chips examined by a professional.
Written on October 26th, 2009 by adminno shouts
Some facts are often found on notebook batteries for notebook users Many people think that plugging the charger when using notebook with installed battery condition is good, because there notebook protection circuit that automatically decide when battery power is full. But it was not like that, this is the reason.
1. The main enemy of lithium batteries is overcharge. Although the notebooks now have intelligent circuit that stops charging when the battery is full, but when the battery is reduced again (because he used) will automatically back up to full charge again, and will be repeated. The problem is, in fact after a full he will not immediately end, but still had few seconds until minutes before the circuits actually work to decide the flow of charging. At the time this happens overcharge, if this happens repeatedly assured battery will drop quickly
2. The second enemy is the life cycle of lithium. Lithium batteries have a certain life cycle where each time a charge capacity will be less and less. We charge an automatic circuit breaker working (short-circuit because it is full charge, then automatically refilled when the battery is not full), Charge the battery from 99% to 100% was considered tantamount to fill from 1% to 100% or 20% to 80%, so intelligent charging circuit here instead become a boomerang, because it will reduce the remaining life cycle of the battery.
3. When the battery charged and in use at the same time, the heat released will be greater because there are two conditions of energy processes. Heat generated can hardly seemed to feel depending on the type dekali notebooks, and we know overheating is one of the main enemy of electronic devices. Use notebook with battery and charger installed simultaneously and continuously, confirmed 1 / 2 years the battery capacity you will be able to drop the remaining live 1 / 2 its just the initial capacity. And not until the year your battery can only hold power 5-10 minutes before the notebook out. Indeed lithium batteries. Although not in use, every year its capacity will drop by itself about 25% of initial capacity when he made (normally do this kind), but there are so cara2 durable notebook battery discharged 2 even 4 years old, with a record capacity must be reduced, but still reliable.
How to use the right notebook battery.
1. How to compromise: Charge the battery up to 95% of (not necessarily 100%), use up the battery going down 5-10% depending on the type of notebook, there is a notebook that 15% had wanted to die (the big notebook and thirst for power) is also a 5% still good (netbook). New plug charger while in use anymore. Remember when you want the full (95% of) off charge it again.
2. The way a little trouble: Just like above, only when the notebook will be in charge, notebook standby / power off / not used, fitted’ve lights green / full off the charger. Here intelligent circuit are usually working right, so it does not happen disconnect and recurring charge (because he used) which causes a decrease in battery life.
3. How to repot. Turn off the notebook, sampe charge the green light signal, off the charger, remove the battery and store in a bag. Pake notebooks via UPS’ll be safe. Travel longer fit the new battery installed. This method can not be used for the type of notebook battery built in (example: Macbook unibody).
Written on October 10th, 2009 by adminno shouts
All Network Administrator will be familiar with server cabinets, the purpose of a server cabinet is to ensure the servers are kept cool, stored in way that it is accessible for installations and maintenance, and help to reduce noise output.
Think of like a bunch of servers all stacked up onto each other, then enclosed in a state of the art server cabinet. These can be seen in many businesses, security offices and computer companies in a separate room or server cupboard. Server cabinets are typically available in a standard 600mm to 800mm width, and 900mm to 1000mm depth. They can also be available with a secure locking system, so the servers will be secure from theft and vandalism.
The cabinets can come in a variety of shapes and sizes, so you are able to fit the desired amount of servers in one cabinet. Co-Location server cabinets allow users to share between each other, further allowing good management of the cabling for maintenance and commissioning. The servers can be accessed through a doorway access from the front or the rear of the cabinet. These can also come open top, sliding side panel, mesh or glass front door and mountable profiles.
Most good quality and strong cabinets can be typically found in large data centres (purposely built for holding masses amount of data onto different servers), in which some cabinets are now able to cool the systems down without having a dire impact on the environment. Traditional cooling methods use a fan, which uses up a lot of energy. Newer methods involve a liquid cooling method as opposed to a fan. Using air conditioning tends to use up more energy in year than any other energy consumption devices.
Using a cabinet liquid cooling device is much more expensive than using air conditioning and fans, however, they are far more effective and beneficial than traditional methods for reducing carbon footprint emissions. Another way of being energy efficient in server rooms and data centres is through good cable management. Stray cables could easily restrict cooling vents and ducts. This reduces energy costs and ensures energy efficiency.
Even though they appear somewhat unessential to certain establishments, they are one of the most important features for many server rooms and centres. They help to keep every server in its place and prevent a disorganised maintenance facility.
Written on October 5th, 2009 by adminno shouts
Think about the Internet as a highway and your computer is constantly traveling it. Add to that the trips your computer makes when working with applications that are not internet based, and you can rack up some considerable mileage that can result in computer problems if you don’t tune it up a bit every now and again.
In the dawn of the computer age, the proverbial geek took care of the necessary operations to help maintain a computer. Of course back then, by default, only geeks had computers. They were not household items in those days and only those who understood them better than they understood other humans had them. These geeks tweaked and optimized those early computers in an almost secretive manner-only because there was little contact outside of geek and computer relationship.
However, times have changed. Computers are in almost every home, in schools, and in the workplace. There isn’t a large enough geek population to assign a personal one for each computer to come and optimize yours when it needs a tune up. The need for keeping up with maintenance hasn’t evaporated though, and ignoring your computer’s need for optimization can result in noticeably slower running times or a computer that may refuse to work at all.
Since your computer didn’t come with its own personal geek, let’s learn a little about optimizing your electronic friend. First, start with creating a restore point. There is always the chance that something can go wrong and you could accidentally lose more data than you intend to if you don’t have a backup point. Many computers have this application included just in case you forget to do it. Some computers even create restore points periodically so that you have a way to undo whatever mistake you made even if you had no clue that your action would create a problem.
Create a backup of any documents you don’t want to lose on the same precautionary basis as the restore point serves. It never hurts to have a couple of ways to ensure that you can undo what you did if you need it. You can do this by simply burning the documents onto a storage disk such as a CD or a DVD.
Now, run a defragmentation on your computer. This can take a while if you haven’t done one regularly. It should be an option in the optimization options on your computer. Once it is done, take a click over to your antivirus software. Many of these have tools to help you optimize your computer. I know my antivirus program automatically tunes up my computer once per week. It keeps my system running as well as it did right out of the box.
Finally, delete any documents or programs that you don’t need. Just as keeping trash in your apartment takes up space, so do these documents on your computer’s memory. Don’t forget to empty your recycle bin after you’ve finished as nothing is deleted fully and no memory is freed up until that is done. This just opens up more room for your computer to do its thing.
Written on September 15th, 2009 by adminno shouts
Seeking data recovery hard drive assistance means you’ve tried everything you know to get back your files. At this point, you have a couple of possibilities, hard drive recovery software tools or hard drive data recovery services. And because there is rarely a second chances if something goes wrong, it’s important to follow a few tips when pursuing data recovery hard drive.
A few helpful data recovery hard drive tips
One of the most important rules of data recovery hard drive is to avoid using the computer with the lost data you want back. It may not make sense to you right away, but the reason for this rule is if you continue using the computer once you detect a problem, your chances of retrieving your files decreases. The file system of your computer will randomly execute a data destroy command to overwrite your missing files. If you are planning to use data recovery hard drive tools to get back lost data but are still working on the computer with a faulty drive, you need to stop what you are doing, remember or write this URL on a sheet of paper, and then bring it up on another properly functioning computer.
The second most common recovery hard drive mistake people make is to download restore data software onto the failing drive. This can also cause your data to disappear for good when your computer sends out the command to do so.
Last but not least, another common mistake people make when they are unable to locate their missing file is reboot the computer. This is actually the most common data recovery hard drive error made. As with the previous mistakes, rebooting your system can cause data to become lost for good when restarting the computer.
Why is recovery possible?
When data goes missing on your computer, it is not actually lost, it’s just hiding. The trouble is the index that points to the file’s actual location on the primary hard drive is lost. This is why data recovery is possible when acted upon quickly.
Make your choice
You have two choices to recover data. The fastest and most cost-effective method of recovery is using a software program that you run yourself. There are a variety of products available on the market, so choosing the right one can be a challenge. However, when your drive is failing it’s time to call on the professionals for help.
You may think you need to be able to match the disk data recovery program with the specific situation that caused you to lose your data. But that isn’t true. Even if you have no clue about what happened, you can start with an undelete program and work your way up one level at a time until you find the program that works. If this sounds troublesome, just choose the most powerful data recovery software available the first time around.
Seeking professional assistance
It’s possible that a data recovery hard drive program may not be enough to locate your data. If this happens, your only other option is to seek the services of a data recovery hard drive expert. Data recovery experts are a more expensive choice for hard drive recovery services, but this is the last alternative for hard drive data recovery. While data recovery service may be more compared to using recovery utilities, getting help from a data recovery hard drive specialist will reduce your risk of data loss.
Written on September 14th, 2009 by adminno shouts
With the way technology is headed, how do you know what size memory is needed for your computer? For example, if you use your computer quite often then chances are that you will need a memory upgrade. One way to determine this would be if your computer is running slower than it used to, or two programs cannot run at the same time without trouble. It is possible that your memory has come close to full capacity. The more programs that you install and run, along with the files and photos that are stored on your computer, the less memory is available for use. This causes a lot of frustration due to computer crashing, slower performance and difficulty installing new programs.
Before buying more memory for your computer, you might consider making some changes. You can put files on a disc and free up that room by deleting the files that are now stored on a disc. Now that space is available for programs or new files that you need. Another option is to go to the start menu on your desktop and click control panel, and click uninstall programs. You can view which programs that you do not use and remove them, this will also free up some memory. You may have a lot of temporary files that are interfering with computer performance and delete these. This will also free up space that you need.
If you don’t want to delete unused programs or burn files to a disc, there are other options such as review how much memory is available for your computer. Another way is find out if all memory slots are in use already, if not then you could buy more memory and install into the slots for memory. For example if your computer has the slots for 2GB of memory but you only have 1GB installed then you can upgrade to gain 50% more memory on your computer. When you are ready to purchase memory it is best to go to a certified computer supply center and ask for the memory upgrade for your specific computer make and model.
If you have basic knowledge of how a computer works then chances are that you can install memory upgrade yourself. Let’s say for example that you want to buy memory to expand to 3 or 4GB, you may want to call a specialist to install or if you just don’t feel comfortable trying to install yourself, it may be best to have a specialist install the memory upgrade.
Another tip would be if you started to do the task yourself, but found that the installation is more involved than you anticipated, it is a good practice to call a specialist. It is better to be safe than sorry, such as you continue to try to install and find that now the computer will not turn on, chances are something was not installed correctly, or possibly you disconnected something that shouldn’t have been disconnected. If in doubt, call a specialist.
Written on September 14th, 2009 by adminno shouts
There are many types of available computer memory on the market today. It can be confusing to wade through them all when considering an upgrade for your computer. So, before you take the upgrade plunge, consider some of the following information. Then, based upon your own discovery of your usage patterns and the cost of compatible memory for your particular computer as well as the advantages and disadvantages of upgrading, you can make an informed decision.
New and improved is not always the angle you should consider first. Instead, evaluate if the new improvements to the specific type of computer memory you intend to purchase are ones that you need and can utilize. There is no shame in passing on advertisements that don’t offer you any true benefits if you have no use for the memory upgrade to which the advertisement is attached.
If you are considering the memory upgrade on the hopes that it will fix a poorly running computer, please consider having your computer serviced and the root problem with performance repaired prior to upgrading your memory. There is no evidence that upgrading computer memory will solve a performance problem if that problem is not related to a lack of memory. In fact, adding memory when the problem is in the core processor will only increase your difficulties and can possibly add to the poor performance of your computer. It is always best to consider the true nature of a computer problem before trying a do it yourself approach. It is also easier on the pocketbook to correctly assess any problems you may have with your computer. Taking it into a store that services computers for a checkup may be the first step you should take if you are thinking of upgrading memory to ensure that inadequate memory is really the reason for a slow running computer.
As with any type of upgrade, if you find that the advantages to upgrading your computer’s memory are in your best interest, then take the time to back up your files before you begin. There is a chance that data could be lost even if the only thing you are adding is computer memory. The few minutes this takes may be the only safeguard you have if something should go wrong.
Consider also that most memory is added via removing the CPU hood and installing “cards”. This does require that you know something about the inside of a computer. If you are unsure about operating the configurations of wires and other foreign looking occupants beneath the casing of your CPU, consider having the memory installed by a professional. The cost of gaining the security of having someone who knows the ins and outs of computers and installing memory can save you money in the long run as the experience they bring to the table can help your memory upgrade go smoothly.
Hiring a professional computer technician is also the wisest choice if you look at the types of memory from which to choose and scratch your head in confusion. Since there is more than one type of RAM and each type has specific properties that perform specific functions, you need a basic understanding of them and what your computer is able to handle in terms of compatibility.
As with any decision and purchase, weigh your options and then make your decision. Whether you hire a professional technician or attempt a do it yourself method, the time you spent researching the decision is ultimately the best thing for you and your computer.
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