Friday, September 12, 2014

Check if your Gmail account is hacked

Around 5 million Google accounts have been compromised by Russian hackers.The account details have been posted on a Russian Bitcoin forum. It is still not clear how the hackers obtained the vast collection of usernames and passwords,while Google denies any unauthorized access on its servers.In fact,there is no telling yet whether the list published is even authenticated,says Google.

How to check whether your Google account is hacked ?

To check if your Google account, which is the gateway to your Gmail, Plus, Drive, Hangout, YouTube accounts as well, has been compromised,there is a secure tool where you can see if your account has been exposed.

Simply type your gmail ID in the given box and click check.

If you don't like to specify your full email address for any reason, you can replace up to 3 characters with asterisk sign (e.g., for enter myac***

What next ?

In case your password has been hacked, then immediately change it by answering the security questions that you set while signing up. Also, enable two-step verification for your account in Settings.
Even if your account has not been compromised, it is advisable to enable two-step verification.

It is always recommended to check your security settings.

Blogger Tricks

Thursday, August 28, 2014

Steering Fundamentals PPT

A Steering Wheel is used by driver to rotate steering shaft that passes through steering column.Steering Linkage connects steering gearbox to steering knuckles and wheels.

Click Here to Download PPT

Fuel Supply System PPT

The purpose of any fuel supply system is to deliver fuel to the engine in a form in which it can mix with air to form a combustible mixture.The fuel must be finely atomized to mix with the air. This is why injection systems deliver the fuel under pressure.

Click Here to Download PPT

Monday, August 25, 2014

Intex Cloud FX Firefox OS Smartphone

Intex Cloud FX

Intex on Monday has launched the first Firefox OS smartphone in India, the Cloud FX, priced at Rs. 1,999. The company had in June announced it would launch the smartphone in August under Rs. 2,000. The smartphone will be  available via exclusive retail partner Snapdeal

Intex Cloud FX Firefox Smartphone Unboxing And Hands On Review

Full Intex Cloud FX specifications

Release date
August 2014
Form factor
Dimensions (mm)
115.90 x 62.00 x 11.80
Weight (g)
Battery capacity (mAh)
Removable battery
SAR value
Screen size (inches)
Touchscreen type
320x480 pixels
Internal storage
Expandable storage
Expandable storage type
Expandable storage up to (GB)
Rear camera
Front camera
Operating System
Firefox OS 
Java support
Browser supports Flash
Wi-Fi standards supported
Wi-Fi Direct
Charging via Micro-USB
Proprietary charging connector
Proprietary data connector
Number of SIMs


Compass/ Magnetometer
Proximity sensor
Ambient light sensor
Temperature sensor

Wednesday, August 20, 2014

Holographic Data Storage PPT

Holographic storage is a mass storage technology that uses three-dimensional holographic images to enable more information to be stored in a much smaller space.  The technology uses holograms which are created when a light from a single laser beam is split into two beams; the signal beam (which carries the data) and the reference beam. In holographic storage, at the point where the reference beam and the data carrying signal beam intersect, the hologram is recorded in the light sensitive storage medium.

Advantages of Holographic Data Storage

  • Storage Capacity: Magnetic and traditional optical data storage use points of a particular recording surface to store information linearly. On the other hand, holographic storage stores data in three dimensions on the recording medium. This essentially allows a larger amount of information to be stored on a smaller space.
  • Storage Size: As more data can be stored on a smaller area holographic memory promises to dramatically reduce the amount of space needed to store vast amounts of data. This has significant consequences for both industry-grade and consumer mass-storage devices.
  • Longevity: Holographic memory allows a user to write something to disc and have it be stable for up to 50 years. Magnetic storage degrades over time, and mechanical issues can lead to the failure of the disk itself. Magnetic storage requires contact between a reader and the recording surface which usually results in breakdown in about five years. On the other hand, holographic storage requires no points of direct contact, but instead uses lasers.
  • Faster Data Retrieval: Holographic data storage also allows for faster data retrieval as memory is stored multi-dimensionally rather than linearly (this allows multiple points to be accessed simultaneously). For this reason holographic data storage allows transfer speeds of up to 1 GB per second. Holographic systems are able to do this as they retrieve whole pages of data, roughly 60,000 bits of data, with a single pulse of light whereas more traditional storage mediums such as DVDs can only transfer one bit of data per pulse.
  • Extremely useful for medical archiving. (magnetic storage devices typically have storage life of 5 years).
  • Extremely optimum for small portable devices because of low power consumption (10GB/Watt) and high data storage capacity.

Disadvantages of Holographic Data Storage

  • Current data storage options on the market such as ‘blu ray’ disks can compete with projected storage capacities of  holographic data storage. This make companies less eager to invest in holographic data storage if current technologies can compete.
  • There are already emerging storage devices such as 3D optical data storage, similar to to holography but can store more data, specifically up to petabytes ( 1000 TB ) of data.

Sincere thanks to Marcine Lohman
Holographic Data Storage Preview

3D Optical Data Storage PPT

3D optical data storage is an experimental storage technology is predicted to offer exponentially more storage capacity than today’s data storage technologies. Researchers have developed working 3D optical data storage devices, but the technology is not yet commercially available due to design issues that need to be addressed.

How 3D Optical Data Storage Works ?

The easiest way to explain 3D optical data storage is to compare it to current DVD technology. DVD data storage operates in a 2D environment. Data is stored across the top of these disks and then that data is read by a laser. Multi-layer DVDs can even store data in different layers throughout the depth of the disc. The laser can then be focused on those layers to read that information.The problem with multi-layer DVDs is that they are limited to about 10 layers. When a laser is focused on one of those “deeper” layers, it has to travel through all the layers on top of that one. This causes interference and limits the number of layers that can be stored on a traditional DVD.3D optical data storage uses technology that allows more than 100 layers to be written on a disc that looks like a traditional DVD. This creates an exponentially larger data capacity in the same amount of space. There are estimates that 3D optical data discs will be able to store 5 terabytes of data or more.
Note – this is a very basic explanation of 3D optical data storage. If you’d like to see the gritty details, check out this Wikipedia page about 3D optical data storage.

Future of 3D Optical Data Storage

The biggest hurdle for 3D optical data storage right now is making it commercially viable for the public. Although working prototypes have been developed, 3D optical data storage has a long ways to go before it becomes a useful data storage format. Multiple companies are working on 3D optical data storage, but it will still be a while before we see something hit the consumer market.

According to Wikipedia, there are three major technical difficulties that need to be overcome:
  • The potential for data to be damaged by lasers that read the data
  • The possibility of chemical reactions that damage data over extended periods of time
  • Media that is easily damaged by lasers
We believe that it is inevitable for data storage to evolve into 3D technology of some sort. The next step up may not be 3D optical storage in particular, but it will be something similar. Technology firms are also working on similar technology called “Holographic Data Storage.” It’s only a matter of time before something new hits the market.

Advantages and disadvantages of 3D optical storage

  • Durability. With proper care, optical media can last a long time, depending on what kind of optical media you choose. 
  • Great for archiving. Several forms of optical media are write-once read-many, which means that when data is written to them, they cannot be reused. This is excellent for archiving because data is preserved permanently with no possibility of being overwritten. 
  • Transportability. Optical media are widely used on other platforms, including the PC. For example, data written on a DVD-RAM can be read on a PC or any other system with an optical device and the same file system. 
  • Random access. Optical media provide the capability to pinpoint a particular piece of data stored on it, independent of the other data on the volume or the order in which that data was stored on the volume
  • Reusable. The write-once read-many (WORM) characteristic of some optical media makes it excellent for archiving, but it also prevents you from being able to use that media again. 
  • Writing time. The server uses software compression to write compressed data to your optical media. This process takes considerable processing unit resources and may increase the time needed to write and restore that data.
Data storage technology is a constantly evolving field of study. From the first days of humans drawing on cave walls to today’s digital storage technology, people have yearned to store their technology in increasingly efficient manners. One day even 3D optical data storage will be remembered as a thing of the past.

Monday, August 18, 2014

Six-Stroke Engine PPT

A six stroke engine describes a number of different approaches in the internal combustion engine to capture the waste heat from the four stroke Otto cycle and use it to power an additional power and exhaust stroke of the piston. Designs either use steam or air as the working fluid for the additional power stroke. As well as extracting power, the additional stroke cools the engine and removes the need for a cooling system making the engine lighter and giving 40% increased efficiency over the Otto Cycle. The pistons in a six stroke engine go up and down six times for each injection of fuel.The six stroke engine has 2 power strokes, one fuel, one steam or air. The currently notable six stroke engine designs include Crower's six stroke engine, the Bajulaz engine and the Six-stroke engine 
The Beare Head engine is called a six stroke by its designer but stands apart from the others. It uses a second opposed piston in each cylinder which moves at half the cyclical rate of the main piston, thus giving six piston movements per cycle. It does not use any additional working fluid. "Six-stroke engine (Trivandrum)"In the six-stroke engine developed by the students of College of Engineering, Trivandrum, India, the first four strokes are the same as a four stroke internal combustion engine. After the exhaust stroke, instead of air/fuel mixture (as in case of petrol engines), fresh air is sucked into the cylinder from the air filter, and is removed during the sixth stroke. The valve overlaps have been removed and the additional two strokes have been provided for better scavenging, using air injection. The engine shows 40% reduction in fuel consumption and dramatic reduction in pollution. Its specific power is not less than that of a four-stroke petrol engine. The engine can run on a variety of fuels, ranging from petrol and diesel to LPG. An altered engine shows a 65% reduction in CO pollution when compared with the four stroke engine from which it was developed.

Advantages of Six-Stroke Engine

1) Reduction in fuel consumption by at least 40%:
2) Two expansions (work) in six strokes
3) Dramatic reduction in pollution:
4) Liquefied Petroleum Gas
5) Cost comparable to those of a four-stroke engine

Billions of explosion engines are running worldwide at this time, and this era is not about to end. It is commercially obvious that the big market if for automobile, heavy goods, construction-site and farm vehicles. This is a priority for the six-stroke engine.Drastically reducing fuel consumption and pollution without radically affecting performances would allow the current concept of the automobile to be reassessed.
There is, at this day, no wonder solution for the replacement of the internal combustion engine. Only improvements of the current technology can help it progress within reasonable time and financial limits. The six-stroke engine fits perfectly into this view. It’s adoption by the automobile industry would have a tremendous impact on the environment and world economy, assuming up to 40% reduction in fuel consumption and 60% to 90% in polluting emissions, depending on the type of fuel being used. Fuel consumption for mid-sized cars should be within 4 and 5 liters per 100km. and 3 to 4 liters for the small-sized cars. Automobiles equipped with the six-stroke engine could appear in the market within 3 to 5 years

Applications of Six-Stroke Engine

1) Motorboats might offer a big outlet for this type of engine. Their characteristics are perfectly suited to its use. Furthermore, the use of fuels other than gasoline would greatly reduce the risks of explosion.
2) Using non-fossil fuels of vegetable origin, natural gases and others, in simple, robust engine, operating with a minimum of adjustments and non-pollutant.
3) Many more applications may also be envisaged.