Posts Tagged ‘computer processor’
November 3rd, 2009 | 
Author: The discovery moves researchers a step closer to utilising semiconductor nano-wires that will be key components of future integrated devices and circuits.
In a paper published in the journal Applied Physics Letters, a team led by Dr Peter Reece, from the UNSW School of Physics, and colleagues from the Australian National University, report for the first time that such tiny objects can not only be held by “optical tweezers” but simultaneously studied in detail using a second laser beam.
“Optical tweezers work by focussing very intense laser beams that can impart forces onto very small objects and let you physically push them around,” says Dr Reece, a UNSW Vice-Chancellor’s Postdoctoral Research Fellow.
“Using one laser beam you can grab an object, turn it around and look at it from all angles and put it into an orientation you’re interested in. What we’ve done is bring in a second laser beam to probe the internal structure of the object itself, using photo-luminescence spectroscopy.
“Every nano-wire – and, indeed any nano-scale object – is different and you need to understand these nuances to make practical use of them. This gives us a new tool that we can use to pre-select the components we want.
“The novel part of our work is to look at the light emitted from the nano-wire when it is excited with the second laser beam as the diagnostic tool; it can tell us so much more about the nature and structure of the material. No-one’s done this before.
“I’m very interested in building nano-sized devices – it’s a big new area of application in science. While our demand for information processing grows unabated, our ability to meet these demands is beginning to waiver.
“The microelectronics industry has reached its limits for providing further levels of large-scale integration of components and, without a change in technology, future computer processor performances will stagnate.
“The optical technologies that revolutionised long-haul communications and brought us high-speed internet may be the key to the future of on-chip information processing. Working with researchers in the UK, we hope we can harness the ‘forces of light’ to build and test prototype nano-scale optical devices which may one day power your personal computer.”
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Article Source: Laser tweezers scan specks
I know how frustrating it is if your computer is working slowly like a crawling snail. Don’t worry because there are methods and software that could help you fix this kind of problem.
I have listed the 7 most common suspects on slow computer problems. Each has different causes, but all have the one annoying result. I have also included the best solution to each problem.
1. The computer processor is too hot – This problem is very common especially during summer time, when everything gets easily hot. To avoid this problem, you need a processor fan which can be purchased in any computer store. However, be reminded that you still have to take care of the fan by cleaning it regularly and checking if it is still working or if the bearings are shaking.
2. The RAM is corrupted or has low memory – There are three probable reasons why a RAM gets corrupted; its timing is slower than what was specified in the optimal machine setting, it is too hot, it has minor but multiple flaws that can only be seen if a thorough testing is done. The only solution to this is to buy a new RAM. You just have to make sure that the RAM is compatible to your mother board.
3. Weakening Hard Disk – Your hard disk is weakening if it takes you several minutes before you are able to access the infected drive, you experience occasional boot failures and blue screen error, and you see that bad sectors are increasing. The same as the RAM failure, you also need to buy a new hard drive to solve this issue. Don’t wait until it crashes. Immediately back-up your files and switch the hard disk to a new one.
4. Incorrect setting of the BIOS – The BIOS duty is to manage the flow of data from the Operating System of the PC to the installed devices like the mouse, keyboard, video adapter, printer and hard disk. If the BIOS setting is not configured properly, the computer will not function properly as well. The solution to this is to do a research in the internet. You just need to type the brand of your motherboard plus the BIOS. Once you find the proper setting, remember or write it down, and then modify the BIOS correctly.
5. Damaged Registry – The computer registry is like a log book where every software, program and devices installed in the computer is recorded. Once it is damaged, the affected software, program or device will not function correctly making your computer work slowly. The best way to deal with this problem is by installing an effective registry cleaner and fixer software. You can find these kinds of software all over the internet.
6. Harmful Adwares and Spywares – Not only will these slow down your PC, it can also cause your computer to crash down in an instant. By installing Adwares and Spywares remover, you’ll be able to prevent your computer from being harmed by these two. There are free adware and spyware remover all over the internet which are downloadable. If you have enough money, do buy a much powerful software.
7. Virus, Worms and Trojans – Whatever they call it, it doesn’t change the fact that these are harmful and definitely slows down your computer. Installing Anti-Virus software is the only way to eliminate these threats.
Since the technology keeps on improving, several companies have created their own softwares, wherein each has the capability to solve multiple slow computer problems. There is only one thing that you should remember when choosing this type of softwares. Make sure that the software has been proven and suggested to be an effective resolution to slow computer problems by many computer users and experts.
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Article Source: Slow Computer Problems – Don’t Worry You Can Fix Them Today!
The BIOS (Basic Input/Output System) in a Microsoft Windows computer is a boot firmware, which provides all of the boot information to computer processor for proper booting of your system. In the first physical sector of BIOS, MBR (Master Boot Record) is stored. MBR loads the first sector of your boot media, either hard drive or floppy. After successfully loading first sector, BIOS examines last two bytes of the boot sector (that is 55AA).
The 55AA is known as boot signature and work like an EOF (End Of File) when the process reads the sector. Damaged or missing (due to operating system malfunction, software errors and improper system shutdown) boot record signature can cause severe issues. In such case, the data stored in the hard drive partition table gets damaged and your system becomes completely unbootable.
In such situations, you can not access any of your hard drive partition and the partition loss situations occur. At this point, you are required to go for Partition Recovery solutions to recover lost, missing or inaccessible hard drive partitions.
In a practical scenario, the boot record signature may get damaged when BIOS boots the system. When boot record signature gets damaged or goes missing, you might come across any of the below given error messages:
“Boot Record Signature AA55 Not Found, xxyy Found”
Or
“Non-System or Non-Bootable Disk”
Or
“Strike f1 to retry boot”
When these error messages occur, your system stops responding and it can not boot up. At this point, you need to find out the cause of partition loss and perform Partition Recovery by sorting out this issue.
Grounds of this issue
This issue may occur due to damage to the key data structure of your computer system. That could be due to virus infection, software errors or improper system shutdown. Due to the same, BIOS can not read the boot disk and can not load operating system.
Resolution
In order to recover lost partitions, you should opt for Partition Recovery Software. These tools are particularly designed to methodically scan entire hard drive and retrieve all of the lost partitions and stored data. Efficient scanning algorithms are used by these applications to achieve absolute recovery. With interactive and simple graphical user interface, these software are completely easy to use.
Stellar Phoenix Windows Data Recovery is the most excellent solution to recover lost hard drive partitions. It recovers all FAT32, VFAT, NTFS and NTFS5 file system partitions. This Partition Recovery Software is designed for Microsoft Windows 7 RC1, Vista, 2003, XP and 2000.
Author is researching on hard drive partition problem and explains the causes of lost Partition. Author has given partition recovery solution to recover your data from hard drive with partition recovery software.
Article Source: Partition Loss in Windows Due To Corrupted Boot Record Signature
Laptop computers are a great choice for people who travel many times every year. Compare with a desktop computer, laptop computers are smaller, lighter and more portable. The name laptop computer describes a computer that is so small that you can fit and place it on your lap to work. There are many models and brands of laptop computers to choose from either online or walk-in stores. You should research and shop around before you actually purchase your laptop computer. Fortunately, most walk-in stores also have a website for you to look at their products for convenience.
A laptop computer has most of the regular desktop components like a keyboard, mouse, cd or dvd drive, monitor, speaker. The differences are the laptop monitor will usually be mounted on the cover of the laptop, so if will be ready to display after you open the cover. A re-chargeable battery is also necessary as a power source for the laptop for traveling, it will come with an AC/DC adapter for you to charge the battery. It typically will provide a few hours of laptop usage. These are the basic components you should research and compare before purchasing a new laptop.
Besides the components we mentioned, memory and computer processor or CPU of the laptop computers are also very important for the performance. RAM or random access memory is temporary memory for the computer, and the more GB or gigabytes the faster the computer is. RAM is even more critical if you create many graphic files with your laptop. Make sure you will also have a higher capacity hard disk in gigabytes to store more data files. Try to buy a laptop with a faster CPU, the measuring unit is in MHz for mega hertz. The higher the mega hertz the faster the laptop computer will be.
If the laptop is your only computer, you may also consider purchasing a docking station, which is an accessory that you can dock the laptop and make it work like a desktop computer. It usually comes with expansion slots, multiple ports, USB ports, and bays for fixed or removable drives, and it can also work with an external monitor. You should find out if the laptop computer has a good reputation for withstanding vibrations, dropping to the floor, and operate in dusty and wet surroundings. There should be many sources like a forum on the web for your research. It will definitely to research and shop around for a more pleasant laptop computer usage experience.
Teeny is a writer for finance, computer, travel, cars, shopping and other subjects for many years, please visit http://www.fidetips.com/computer for more information.
Article Source: How to Choose a New Laptop Computer
People will either buy a new desktop computer to replace their manual work or their outdated desktop computer. With the advances of computers today, a desktop computer will become outdated very quickly. Fortunately, the prices to purchase a new desktop computer are becoming more inexpensive and the features are improving. However, there are so many brands and configurations to choose from, people will need to prepare themselves with researching before going for a new computer.
You can find plenty of information about a desktop computer on the web, because of the convenience of search engine websites. Besides going for the reasonable price, things like warranty, technical support, upgrades and the quality of each component of the desktop are also important. Components like keyboard, mouse, monitor, memory, cd and dvd drive, computer processor, number of extension slots, number of USB ports, graphic and sound systems are things that need to be considered.
A comfortable keyboard will make your work easier, especially if you work many hours a day in front of the computer. Keyboard connections can be PS/2 or USB connectors to the computers. Most people will prefer USB because it is easy to connect to the computers. Just plug it in and Windows will automatically configure the computer for it. Mouse is also important to navigate the pointer or cursor on the screen, clicking a button, option box, or checkbox. There are remote and wired mouse, ball rolling and optical mouse to choose from.
Selecting the right speed of the computer processor or CPU is critical for the performance of the computer besides memory. The CPU with 2.0 GHz, which stands for gigahertz or the measuring unit for speed, will be faster than the 1.0 Ghz CPU. The size of Random-Access Memory or RAM for temporary storage will also affect the speed of the computer, the more GB or gigabytes the faster. Hard Disk is another storage device that store data permanently until they are erased, the more gigabytes the more storage capacity. You can refer to the technical specifications of the desktop computer or ask the technical support personnel for advice.
The monitor is essential for the desktop computer to show the data and graphics on the screen for the computer. LCD Flat screen monitors have become the standard as the displaying unit for computers. Things to look at are resolution, contrast, refresh rate, response speed, and brightness, they are all important for user visual comfort and health. CD and DVD drives with the right speed will also affect the performance of the data access for the computer system. Again, you can always do the research on the web or asking the technical personnel.
Teeny is a writer for finance, computer, travel, cars, shopping and other subjects for many years, please visit http://www.fidetips.com/computer or http://www.fidetips.com/shopping for more information.
Article Source: How to Shop for a Right Desktop Computer
People will purchase a new computer for various reasons like replacing the computer they have been using for a long time, buy it for the first time to replace the manual work, a new computer for the kids just enter high school, or any other reasons. Whatever the reason will be, there are many choices for buying a computer like different brands, manufacturers, computer options and features to choose from. Fortunately, there are many sources of helpful information that will help people find the right computer. Sources like from the search engine websites, online supports from computer or electronics websites, and clerks from a walk-in computer stores.
It will help improving the owner experience of the new computer with research before actually buying the new computer. Considerations like where to buy the computer, from which computer website, online electronics store or walk-in computer store. What kind of computer options will the users need for computer, like memory, computer processor, circuit cards, ports, standalone or network computer are important. Also, you will need to consider the support and warranty from the computer store and the manufacturer that manufacture the computer.
You can purchase name brand computers or built-for-you computer from a computer or electronics company. The important thing is the support and warranty of the computer that will protect your computer investment, you will need to do the research on how long the warranty will be adequate. It will make a difference for whether you are buying a laptop or desktop computer, and different options you choose for the computer. Various choices will require different types of warranty and maintenance plans. You will also need to think about if you will really need the extended warranty for the computer too.
Also decide on the computer options for what types of monitor, keyboard, mouse, quality of the sound system, number of circuit board extension slots, memory like amount of RAM or random access memory, amount of hard disk space, number and quality of CD-ROM and DVD drive, network card, numbers of USB ports, quality of the video display card and many other features of the computer. These can be quite overwhelming for a new or first time computer buyer with little experience about computer. But like we mentioned earlier, fortunately, there are many resources for research and answer from the web and store supports, before your make the final decision on the computer.
In conclusion, it will be a pleasant experience to be the owner of a new computer if you do adequate research for the new investment. It will bring many months or years of convenience and great experience of using the new computer.
Teeny is a writer for finance, computer, travel, cars, shopping and other subjects for many years, please visit http://www.fidetips.com/computer for more information.
Article Source: New Computer Purchase Decision
When realizing the term data acquisition (DAC) it’s important to first know what is being acquisitioned: real world data. And real world data translates directly into the life sciences.
Life science, or biology, is a discipline of science that has, for hundreds of years, formed opinions of scientists, doctors, and thinkers alike. Theories and medications have been created with the study of life science, just as crimes have been solved, and organisms understood. The basic way living organisms interact with one another and their surroundings, how these organisms are structured, how they grow, what their origin may be, and their general evolution, is more or less what the term ‘life science’ encapsulates.
Real world data gets manipulated by a computer, where its signals and waveforms are processed, extracting critical information and storing it digitally in a computer processed machine. The data gets measured by components of data acquisition systems where sensors convert measurements and electrical signals before a computer manipulates the data and its signals and waveforms are processed. Critical information is then obtained and stored digitally in a computer processor, completing the first and second steps of the data acquisition process.
After life science has been converted to wavelength data, it is recorded by a data logger. Data logging is an electronic device that collects data over time, or in a specific radius, and is collected by one of three means, which include: built in instruments and sensors, or external instruments and sensors. After said data is collected, manipulated, and transformed, useful information is highlighted to suggest different types of scientific conclusions.
This process, seemingly lengthy, has allowed many growths in scientific understanding and continues on a number of levels to produce further understanding of organisms, and their relationship to the world at large.
For more information on data acquisition and data acquisition systems, please visit Biopac.com
Article Source: Data Acquisition