new tablets

NEW PICTURES FOR TABLETS 2014.












6 Causes Of Thick Film Resistor Failure

Thick film resistor failure is rarely caused by a failure of the resistive element but is generally due to external environmental factors such as mechanical and electrical stresses and handling issues. Failures can be either classed as a degradation of performance or complete failure (usually as an open rather than a short circuit).

Six common causes of thick film resistor failure are:

Thermal issues
Mechanical stress
Constant overload
Surge
Environmental - metal migration
ESD

MECHANICAL FAILURES

Apart from handling damage leading to substrate cracks and chips most mechanical damage is caused by either vibration or inappropriate mounting of the device. Micro cracking of the resistor material caused by vibration or compression / extension of the resistor due to inappropriate mounting can lead to change in the resistance value, damage to the resistive element or component failure. In all cases the risk of failure is increased by presence of one or more of the stresses listed below.

ENVIRONMENTAL FACTORS

Although a thick film resistor is often coated to protect it from moisture and aggressive chemical elements environmental factors such as moisture and contamination still require careful consideration. Both can cause metal migration between the terminals of the resistor leading to potential short circuit or a change in resistance value.

THERMAL ISSUES

Most mechanical failure modes of thick film resistors are propagated by heat. It is therefore important to understand the heat dissipation properties of the resistor and substrate material. A low power resistor dissipates heat via conduction through its component leads or connections, while a high power resistor dissipates heat through radiation.

When current passes through a resistor it generates heat and the differential thermal expansions of the different material used in the resistor manufacturing process induces stresses in the resistor. Temperature Coefficient of Resistance (TCR) is the best known parameter used to specify a thick film resistor stability, and defines the resistive element's sensitivity to temperature change. Power Coefficient of Resistance (PCR) quantifies the resistance change due to self-heating when power is applied and is particularly important for resistors used in power applications.

OVERLOAD CONDITIONS

A continuous over-load of a resistor device degrades the insulation resistance and changes the resistor parameters over time. Voltage stress can cause conduction from normally non-conductive materials in the resistor film leading to deterioration and occasionally failure due to hot spots. It is therefore important to observe the resistor maximum specified voltage.

SURGE CONDITIONS

The key element in determining the surge survivability of a thick film resistor






is the mass of a resistor element, which is directly proportional to its thickness multiplied by its surface area. The geometry of a resistor also affects its surge withstand capability. A larger surface area results in a higher film mass, and ultimately an improved surge performance. The increased surface area allows more heat dissipation which is important in power resistor applications.

The final factor contributing factor to a resistor surge capability is how the component is resistor trimmed to establish the final resistance value. The method used for trimming can create weak spots that cause failure under surge conditions.

ESD

Damage via ESD is a latent defect that can be difficult to detect. The resistor may be partially degraded by ESD but continue to perform its intended function. However, the chances of premature or catastrophic failure of the resistor device are increased, particularly if the device is exposed to one or more of the stresses listed above.

CONCLUSION

A resistor may be the lowest cost element in a system but failure can be just as catastrophic as failure of any other system element. It is therefore important to understand potential failure modes and how they may be addressed. A partnership with a specialist manufacturer with long term experience of thick film resistor technology and its manufacture can minimise the risks of failure.

What Are Android TV Boxes?


Android TV Boxes are the next up and coming gadgets for people who are fed up with cable and smart TV prices. There are similar boxes on the market that you may recognize: Apple TV and Roku are the most popular. But until recently, there were no Android TV boxes on the market. Now there are. With Google TV as the frontrunner, the Android TV box is gaining momentum.

So what, exactly, is an Android TV box? Simply put, it is a device, usually in the shape of a very small box (Around 14 cm wide and 4 cm tall), that streams media content on your television. These boxes are inexpensive options for people who do not want to pay for subscription services or have to buy a PlayStation, Xbox or similar, which were some of the first and most popular ways to stream media to a television. People can use their box to stream Netflix, Hulu, Amazon Instant, Video, and many other streaming services.

But what makes these boxes different is that, rather than being a box that has a self-contained Wi-Fi connection, it can connect to your Android phone, tablet or iPhone as its primary method of streaming. What does this mean? For one, there is not another device to learn to use. Using an Android based box is often as simple as using your smartphone like you always do. Plus you have access to all of your favourite apps and games.

Many media centres cost a substantial amount of money, but an Android TV Box with XBMC competes on the same level for a fraction of the price. XBMC is an award winning platform that you can install on many devices. What makes the XBMC platform different is that you are able to play media files that are stored locally on your device or an attached USB flash drive or hard drive as well as streaming them from the internet. Meaning that all of those movies and songs you have downloaded can also be streamed to your television too. One of the best features of the XBMC platform is the add-ons. There is an add-on for everything you love to do on the internet. Love Reddit? Now you can stream it on your television. Love your movies, TV shows and sports, you can watch all of these on XBMC. This kind of open source platform means that they sky is the limit when it comes to add-ons with new ones being released every day XBMC is something to be watched.

So if you are thinking about buying a box and ditching cable and your subscription service, make sure to consider buying an Android TV box. It offers an affordable and a lot more flexible platform than its current competitors.

What You Need to Know About Time Servers and Embedded Computers


Perhaps you have wondered how all of the different websites and places on the Internet are able to stay perfectly synchronized at all times with respect to time. The technology that allows this to work is called a network time server, which often uses embedded computing in order to reference the correct time. This article is a basic introduction to how time servers and embedded computers work to keep the Internet, and a plethora of other functions and applications, working properly.

Why We Need Synchronization

The Internet is simply the first example of why different technology components or posts need to be synchronized. Another example is that of a manufacturing line. Modern production lines contain vast computer systems to measure and manage output, inventory, and demand. All of these systems need to be synchronized in order to communicate the highest fidelity real-time data. This is true in a tremendous array of systems, including cars, manufacturing, and industrial and financial applications, just to name a few.

Time Servers

Inside every computer, be it your personal computer or the computer under the dash of your car, you will find a time server. This server reads the actual time from what is called a reference clock, which is usually a local network clock, or an atomic clock reading from the Internet. It then distributes and updates every other component in the system with the proper time, ensuring that every component is operating in step with every other single component.

Network Time Protocol NTP

One way that time is distributed and synchronized across the Internet is called the Network Time Protocol or more often, simply NTP. While there are other protocols available for use, they are far less popular, and often proprietary and meant for sending time stamps through radio frequencies and serial connections.

Time Reference

There are several choices for the clock that the time server references to update the correct time. For simple applications, this is usually just a time server on the Internet, usually powered by a radio or atomic clock. However the time source considered the most 'true' and correct is a GPS master clock. This clock uses the global positioning system satellite, to measure the earth's rotation, orbit, and sun exposure to provide the absolute correct time.

In fact, the many different time servers are rated and placed in what is known as a 'stratum' depending the quality and accuracy of the time it reports. This is 0-14 scale, where a rating of 0 is the most accurate clock, usually a highly specialized GPS clock. Since many individual components have their own embedded computers and time servers, the disparity in time accuracy can sometimes cause problems.

Embedded Computers

An embedded computer can be thought of as a tiny computer that is meant for one or two specific purposes. These computer can be extremely small, but simply perform their one function with minimal data or use of resources. Most embedded computers prefer a lower strata time source as opposed to higher, because it is more accurate. If your varied systems also have varying accuracy of time, there may be difficulty establishing communication of data between those systems.

If you are having trouble synchronizing your network time server, you may benefit from the consultation of a time server and embedded computing specialist. Go to Aventasinc.com now!

Article Source: http://EzineArticles.com/?expert=Rocky_C_Rhodes

How to Start Your Own Computer Repair Business








If you consider yourself an expert in matters related to information technology, you can start a service repair and computer maintenance. To learn how to start your own computer repair business, read on.

The first step you should take when you are considering starting a business is to set the right price for your service. Time is money, and you probably need to load time.

Previously, workshops or PC computer repair were mainly called to remove viruses that have infected a computer. Now their job is to protect computers against viruses before they enter the computer. As they say, "prevention is better than cure".

The next step in starting a business repair computer, is to identify your customers. Do you want to sale to companies or individuals? You need to find a niche, so that you can specialize in a small market area. You must also make the decision to quit your job one day and run your enterprise full time. If you have no background in the field of finance, you need to employ accountants to record your transactions.

Here are some tips on starting a computer repair business

You should promote your business by sending and distribution flyers or brochures. You can also promote your business on the Internet, chatting on forums or through SEO or e-mail marketing.

You need to build trust with the customer, as it gives a computer that may contain a social security number, credit card numbers, and so on. The technician should provide his credentials, so that the customer is reassured that techno can do the job.

You also need to keep your technical skills up to date. You must train yourself and maybe even have certifications. You must have good social aptittudes. If you can not solve a particular problem, you can find help online by posting the question on the forum Consulting Enterprises.

Rental and Fees

You can run your business from the garage to your home, you will save money since you do not have to rent space for your business. Running a home business can cause quite a change, if you are used to working in a large company. You need space to keep desktops, and you will also need cabinets to store your files.

You can charge Diagnostic fees to test all hardware and software. If you can not understand the problem, you can pay the cost of diagnostics. After determining the problem, you can give a written estimate so you can come to an agreement with the customer.

You can repair your client computers remotely over the Internet. You can connect to the client's computer and control it from the mouse, while the customer looks at you solve the problem. Computer Repairs can be done on site or off site, which may be less expensive if the customer shall file and recover the computer.

You are competing with other companies that are recognized by customers. However, you have an advantage over those stores because you are focused locally. Some small businesses also outsource their repair and PC maintenance of offshore companies.

You can get started in computer repair by obtaining a franchise from another company if you have the means. You can also buy computer parts from an online retailer to develop your business. You can also become a doctor of data that recovers data if the hard drive of your client has failed.

Now that you know how to start your own business of computer repair, you can try to attract customers.

What Is a RAR File and How Can It Be Opened?





So somebody has emailed you an important file, but you have known idea how to open it. Its extension, 'RAR', is something that is alien to you. You are intrigued as to what are the contents of this file are, and more importantly how can you open it?

Although the name may seem new and difficult to you, don't worry the process of opening this file will be familiar and easy for you. If you are an average computer user, then it will hardly take you 10 minutes to learn how to open a RAR file.

Before we begin talking about how to open a RAR file, we need to learn about what the.RAR extension file really is. RAR file, like traditional ZIP files, is an
extension used for compressed files. People who are familiar with ZIP files know that once a file is compressed its size decreases but its contents remain the same. Unzipping the file will make the contents return to original size. It is sort of like packing. Each compressed file needs to be uncompressed before it can be used.

The basic difference between ZIP files and RAR lies in the algorithm that is used by both programs. For an average user, this doesn't mean much. All you need to understand is that the files which are compressed using RAR will have a smaller size then the files which are compressed using ZIP. It may be one of the reasons you may have received RAR file in the first place, somebody must have wanted to send you a big file that couldn't fit in the email if they zipped it so they packed it with RAR.

So now we come back to the original question on your mind, what can you do to open an.RAR extension file? The first thing that you need to do is to download suitable software which is capable of opening an.RAR extension file. You can find a lot of software on the internet that possesses the capability of opening such a file. Once you have downloaded the software you chose, all you need to do is follow the step by step instruction that is available in the program for extracting the file.

You can also compress your own files to RAR using suitable software. RAR provides a smaller size, and greater security then ZIP files. If you're not good with these things, you can use the set-up wizard in your software that will take over the difficult steps for you. It's as easy as opening a ZIP file!

Know More About USB Copy Protection






Software protection Dongles are in use more frequently now than ever before; piracy and copyright issues, among others, are the prime reasons for protection of software content from misuse or manipulation for unethical reasons.

In the late 1970s / early 1980s during the days of the Wordcraft program, software protection became a key issue in the light of rapid developments in hardware devices, software programs and technology as a whole.

The rapid evolution of Dongles into active devices combined with the rapid advancements in computers and desktops; before the IBM PCs came on, Sirius Systems Technology and ACT Apricot Computers were among the first to use Dongles for software protection. These were mainly parallel or serial interfaces containing serial transceivers and microprocessors that handled transactions with the host computer.

Later Dongle versions have adopted the USB interface which has become dominant in current usage.

Complete Solution

The files in a USB flash drive or any other medium of data storage, especially a mobile device, require protection from unauthorized access, copy and distribution. USB Copy Protection is a complete copy protection solution that allows USB drives to go from storage devices to powerful media carriers. Among other features, the main security advantages provided by USB Copy Protection are controlling user rights, limiting users, preventing copies and setting expiration dates.

These obvious advantages provide utmost safety to products and IPs in USB drives making them more user-friendly and convenient to use; accidental deletion of material can be controlled using Auto Run / Auto Play functions. It also provides content protection and freedom from breach of copy or illegal usage of software.

Features of USB Copy Protection

The key safety features afforded to customers include copy protection, user authentication and validity period of usage. Notable among many facilities and features afforded by USB Copy Protection are:

• Accessibility
• Compatibility
• Content Protection
• Data Security
• Digital Rights Management
• Ease of Use
• Multi-format support
• Portability
• Time Limit

Support for File Types

A wide range of document and media formats are afforded protection by USB Copy Protection. The formats that are widely in use are:

• Audio file formats like MP3, WAV
• BMP, GIF, JPG and PNG
• CAD, DWG
• Executable Programs
• PDF, TXT, XML documents
• Video File Formats such as MOV, MP4, RM, WMV
• Word, Excel and PowerPoint documents

With constant updating of infrastructure and components, the support is likely to extend to more file formats; newer enhancements of software support will also likely extend to bug fixes.

 
bankelectronic © 2012 | Designed by LogosDatabase.com , in collaboration with Credit Card Machines , Corporate Headquarters and Motivational Quotes