Tuesday, 20 October 2015

Wireless charging - A technology for wirefree life


Wireless Charging is just what it sounds like — a way to charge your phone, tablet or other device without using any wires. Wireless charging is a simple as placing your device on a charging pad and letting the magic happen. The charger itself is of course connected to a power source, but your device doesn't have to be physically plugged in. Wireless charging has actually been around for years and seen in devices like the Palm Touchstone, however people are now most familiar with it in the form of Qi.

More and more Android devices are supporting wireless charging, and it's likely that soon all Android devices will support this method.

If you really want to dive into wireless charging and find out all there is to know, you can read over Wireless charging, but here's a quick breakdown:

Wireless charging uses two resonant inductive couplings to transmit low-power signals between two devices. The base station has a transmitter coil and your phone has a receiver coil. The base station regularly sends a signal out, and when a resonance or capacity change is found because a compatible receiver coil is close enough, the signal is modulated and inductive charging begins.

Inductive charging is using two electromagnetic coils to create a magnetic field between two devices — in this case the coils in the charger base and your Android. This is the same theory that the transformer you plug into the wall to charge your phone the normal way uses. A magnetic field "creates" electricity through the difference of potential and vibration.


The coil in your Android is also connected to the battery charging circuit, and your battery is charged using the energy induced in the magnetic field. Of course, excess heat is created as well, and that's part of why wireless charging isn't the most efficient way to transfer power from the wall to your battery. This is why it takes longer to charge your phone on a Qi pad than it does to plug it into the wall. While new methods and materials use higher frequencies and thinner coils than past iterations, wireless charging is still less efficient and more costly than standard charging over a wire.

Monday, 19 October 2015

10 tips for taking pictures form mobile camea






We've laid out ten tips for taking good photos on a smartphone, so hopefully you'll be well on your way to producing some awesome shots from a fairly limited camera platform.
1-

Know Your Auto Mode


Knowing how the automatic shooting mode on your smartphone camera works can greatly help you take good photos. Take the time to learn when it uses high ISOs, when it uses long shutter speeds, and adjust how you take photos accordingly. It especially helps to know when you decide to…

Two photos taken with the Nokia Lumia 930. Adjusting the white balance manually is necessary to get a good photo
2-

Override the Defaults


Smartphones can be pretty good when it comes to choosing settings, but not always. Metering can sometimes be pretty shoddy indoors and in cloudy conditions, which is where overriding some of the settings can come in handy.
If you think the white balance is off, change it. If the photo is underexposed, use the sliders found in most camera applications to boost it. If you’d pretrain to blur, up the ISO used by the camera manually. Don’t forget about the flash either, which is sometimes necessary.
If center-weighted metering isn’t providing the right results, you might also considering switching to spot-metering, which some cameras allow you to do. Center-weighted looks at the entire image and meters according to what it sees, with a preference on the center of the frame. When shooting subjects off-center, it can be a good idea to switch to spot metering so the area around the ‘spot’ you select is exposed perfectly.
3-

Use Good Posture (or Even a Tripod)



A key method for reducing blur is knowing how to hold a smartphone camera in a stable way. Holding your arms outstretched or far away from your body can make them sway more when photographing. Moving your elbows into the sides of your body can give a bit of extra stability where needed, as can physically resting the smartphone on a stable object.
If you want perfect stability, it is possible to get a tripod attachment that you can slot your smartphone into. You’ll probably look a bit silly bringing a tripod out and about to use with your phone, but I have seen and achieved myself some fantastic shots with a tripod in hand.

The Samsung Galaxy S5's HDR mode greatly improves visible detail in shadows

4-

Harness HDR Mode


Dynamic range – the range of light intensities a camera can capture in the one photo while preserving detail – tends to be a weak point in smartphone cameras. In scenes with both dark and bright areas, such as a shadowed forest, it’s difficult to capture detail in the shadows and highlights at the same time. This is where HDR mode, or high dynamic range mode, comes into play.
HDR mode takes two images of different exposures near-simultaneously, and then combines them to produce one image that has higher dynamic range than the sensor can normally achieve. On most smartphones, this is something you can and should enable when the scene you’re photographing has widely varying contrast. The difference in photos can be vast, especially on Samsung smartphones where the HDR mode is particularly effective.
HDR mode shouldn’t be used all the time, though. As it has to take two photos and combine them, trying to photograph a fast-moving subject in HDR mode can lead to nasty ghosting and other unwanted effects. Using HDR mode in darker conditions can also introduce blur, simply from the combination of two images with slow shutter speeds.
5-

Use the Whole Sensor


Something that really irks me about smartphone OEMs is their choice to always default to a 16:9 image capture ratio even if the sensor itself is not 16:9. You won’t have to do anything if you have a smartphone with a 16:9 sensor like the Galaxy S5 or HTC One M8, but if you don’t, switching back to standard 4:3 can be beneficial.
Shooting in 4:3 on a 4:3 sensor not only gives you access to the full resolution of the camera, but it still allows you to crop down to 16:9 after the fact with more pixels to playGalaxy S5 or HTC One M8, but if you don’t, switching back to standard 4:3 can be beneficial.
Shooting in 4:3 on a 4:3 sensor not only gives you access to the full resolution of the camera, but it still allows you to crop down to 16:9 after the fact with more pixels to play with. Didn’t frame the shot perfectly the first time? Well if you were shooting in 4:3 and using the whole sensor, you might be able to get a better photo out of your shot.


HDR shot taken with a Samsung Galaxy S5 and edited in Adobe Lightroom. The original can be seen here.

6-Edit


The final piece of the puzzle that often stops a photo captured with a smartphone from looking truly awesome is the post-processing stage. All the detail and necessary information has been captured, but it may not look as vibrant as you were after, or as sharp, or as beautiful.
It’s easy to fix this: chuck the photo in an editing program on your computer, like Lightroom, or even use an app on the device itself and begin playing around. After moving a few sliders and ticking a few boxes, the results might astound you and your friends.
7-

Check the App Store


You don’t have to use the default camera application on your smartphone. Check the Google Play Store, App Store or Windows Phone Store on your respective device and look for a standout camera app. Look online to see what people are saying, because there are some gems out there that can add features and controls to the smartphone photography experience.
Camera Zoom FX, as silly as it may sound, is a really solid camera replacement for Android devices. If you’re using a Windows Phone and it’s made by Nokia, make sure you’re using Nokia Camera. As for iOS, Camera+ and ProCamera are some applications to consider.
8-

Never Zoom


Most smartphone cameras have the ability too zoom in while taking a photo. As the overwhelming majority of smartphones don't have an optical zoom module, this zoom feature digitally zooms, simply enlarging and cropping the output from the sensor before the photo is captured. To get the best photos from your camera, never use the zoom feature.
Zooming before capturing does not allow you to reframe the image after the fact: you're essentially losing data and reducing quality with no way backwards. Yes, the image will appear to show an image in the distance closer than it would otherwise, but you can very easily take the photo without zooming first, and then crop it afterwards. Taking the photo without zooming provides flexibility and the ability to change your mind later.


9- Go Macro


Smartphone cameras don’t have the best bokeh from their wide-angle lenses, meaning it’s hard to achieve DSLR-like background blur with medium range shots (unless you have some fancy tools like the Duo Camera on the HTC One M8). How do you achieve that pleasant blur? Simply get closer to the subject of your shot, utilizing the close macro range of the focus system.
Some of the best photos I’ve achieved with a smartphone have been macro-style, using the small amount of bokeh that’s achievable to my advantage. On an f/2.4 camera system, like the LG G2 or Nokia Lumia 930, don’t expect anything incredible; but if you’re blessed with an f/2.0 system like the Sony Xperia Z2 results can be surprising.
10-

Light It Right


If you want to get serious about smartphone photography, it’s crucial that your photos are lit well. Small sensors typically found in phones are not very capable when lighting gets poor, so it’s always best to ensure your subject is well lit when taking a shot. If you can use your camera at ISO 100 or lower, you’ll see less grain in the resultant image, and photos will look clearer and more impressive.
One way to achieve better lighting for your smartphone photos is to get strong artificial lights, but this probably isn’t practical or worth it considering it’s not a DSLR. The flash also tends not to be so great, so you can rule that out as well. This leaves natural light 

Sunday, 18 October 2015

Electromagnetic concept car by audi




Thinking, a year ago, the idea that we’d actually have a working hoverboard on the market probably still seemed far-fetched. With Lexus now delivering, designer Kevin Clarridge keeps our collective imagination stoked for more, serving up a look at what a possible Audi electromagnetic car concept could one day look like. A mix of Jetson’s tech and a touch of I, Robot‘s sweeping lines, the forward-thinking designer blends Audi’s traditional sports car lineage with magnetic levitation technology in place of the usual axles and wheels to allow it to float much like the high-speed trains in Japan. While we may not see this car come to pass for some time, you have to admit Clarridge is pretty spot on with its Audi-like look.
     Pretty much, it’s an Audi hover car. No wheels, no axles, just the ability to float along the magnetically charged roads of the future with an aggressively beautiful design and classic coach doors. The classic Audi rings are prominently visible, while the design seems to have deep roots in the existing R8.

While it may sound like the tech for this kind of a car is still off in the distant future, it’s not impossible to think that we may see such a car in our lifetimes. Lexus unveiled a working hoverboard in August of this year, and it’s just a matter of time until they can adapt that tech to a larger, heavier mode of transportation.

10 Tips for Good Smartphone Photography

Recently we took a look at the hardware that makes up your smartphone camera. While it's interesting to know and understand what constitutes a digital camera module, that won't help much when it comes to actually taking a photo on your smartphone. From a photography enthusiast and mobile hardware reviewer, I've put together this guide to tackle that part of the equation.
We've laid out ten tips for taking good photos on a smartphone, so hopefully you'll be well on your way to producing some awesome shots from a fairly limited camera platform.

1-
Know Your Auto Mode
Knowing how the automatic shooting mode on your smartphone camera works can greatly help you take good photos. Take the time to learn when it uses high ISOs, when it uses long shutter speeds, and adjust how you take photos accordingly. It especially helps to know when you decide to…
Two photos taken with the Nokia Lumia 930. Adjusting the white balance manually is necessary to get a good photo

2-
Override the Defaults
Smartphones can be pretty good when it comes to choosing settings, but not always. Metering can sometimes be pretty shoddy indoors and in cloudy conditions, which is where overriding some of the settings can come in handy.
If you think the white balance is off, change it. If the photo is underexposed, use the sliders found in most camera applications to boost it. If you’d prefer grain to blur, up the ISO used by the camera manually. Don’t forget about the flash either, which is sometimes necessary.
If center-weighted metering isn’t providing the right results, you might also considering switching to spot-metering, which some cameras allow you to do. Center-weighted looks at the entire image and meters according to what it sees, with a preference on the center of the frame. When shooting subjects off-center, it can be a good idea to switch to spot metering so the area around the ‘spot’ you select is exposed perfectly.

3-
Use Good Posture (or Even a Tripod)
A key method for reducing blur is knowing how to hold a smartphone camera in a stable way. Holding your arms outstretched or far away from your body can make them sway more when photographing. Moving your elbows into the sides of your body can give a bit of extra stability where needed, as can physically resting the smartphone on a stable object.
If you want perfect stability, it is possible to get a tripod attachment that you can slot your smartphone into. You’ll probably look a bit silly bringing a tripod out and about to use with your phone, but I have seen and achieved myself some fantastic shots with a tripod in hand.
The Samsung Galaxy S5's HDR mode greatly improves visible detail in shadows

4-
Harness HDR Mode
Dynamic range – the range of light intensities a camera can capture in the one photo while preserving detail – tends to be a weak point in smartphone cameras. In scenes with both dark and bright areas, such as a shadowed forest, it’s difficult to capture detail in the shadows and highlights at the same time. This is where HDR mode, or high dynamic range mode, comes into play.
HDR mode takes two images of different exposures near-simultaneously, and then combines them to produce one image that has higher dynamic range than the sensor can normally achieve. On most smartphones, this is something you can and should enable when the scene you’re photographing has widely varying contrast. The difference in photos can be vast, especially on Samsung smartphones where the HDR mode is particularly effective.
HDR mode shouldn’t be used all the time, though. As it has to take two photos and combine them, trying to photograph a fast-moving subject in HDR mode can lead to nasty ghosting and other unwanted effects. Using HDR mode in darker conditions can also introduce blur, simply from the combination of two images with slow shutter speeds.
5-
Use the Whole Sensor
Something that really irks me about smartphone OEMs is their choice to always default to a 16:9 image capture ratio even if the sensor itself is not 16:9. You won’t have to do anything if you have a smartphone with a 16:9 sensor like the Galaxy S5 or HTC One M8, but if you don’t, switching back to standard 4:3 can be beneficial.
Shooting in 4:3 on a 4:3 sensor not only gives you access to the full resolution of the camera, but it still allows you to crop down to 16:9 after the fact with more pixels to play with. Didn’t frame the shot perfectly the first time? Well if you were shooting in 4:3 and using the whole sensor, you might be able to get a better photo out of your shot.

HDR shot taken with a Samsung Galaxy S5 and edited in Adobe Lightroom. The original can be seen here.


6-Edit
The final piece of the puzzle that often stops a photo captured with a smartphone from looking truly awesome is the post-processing stage. All the detail and necessary information has been captured, but it may not look as vibrant as you were after, or as sharp, or as beautiful.
It’s easy to fix this: chuck the photo in an editing program on your computer, like Lightroom, or even use an app on the device itself and begin playing around. After moving a few sliders and ticking a few boxes, the results might astound you and your friends.
7-
Check the App Store
You don’t have to use the default camera application on your smartphone. Check the Google Play Store, App Store or Windows Phone Store on your respective device and look for a standout camera app. Look online to see what people are saying, because there are some gems out there that can add features and controls to the smartphone photography experience.
Camera Zoom FX, as silly as it may sound, is a really solid camera replacement for Android devices. If you’re using a Windows Phone and it’s made by Nokia, make sure you’re using Nokia Camera. As for iOS, Camera+ and ProCamera are some applications to consider.
8-
Never Zoom
Most smartphone cameras have the ability too zoom in while taking a photo. As the overwhelming majority of smartphones don't have an optical zoom module, this zoom feature digitally zooms, simply enlarging and cropping the output from the sensor before the photo is captured. To get the best photos from your camera, never use the zoom feature.
Zooming before capturing does not allow you to reframe the image after the fact: you're essentially losing data and reducing quality with no way backwards. Yes, the image will appear to show an image in the distance closer than it would otherwise, but you can very easily take the photo without zooming first, and then crop it afterwards. Taking the photo without zooming provides flexibility and the ability to change your mind later.

Taken with the Sony Xperia Z2 and its f/2.0 lens

9- Go Macro
Smartphone cameras don’t have the best bokeh from their wide-angle lenses, meaning it’s hard to achieve DSLR-like background blur with medium range shots (unless you have some fancy tools like the Duo Camera on the HTC One M8). How do you achieve that pleasant blur? Simply get closer to the subject of your shot, utilizing the close macro range of the focus system.
Some of the best photos I’ve achieved with a smartphone have been macro-style, using the small amount of bokeh that’s achievable to my advantage. On an f/2.4 camera system, like the LG G2 or Nokia Lumia 930, don’t expect anything incredible; but if you’re blessed with an f/2.0 system like the Sony Xperia Z2 results can be surprising.
10-
Light It Right
If you want to get serious about smartphone photography, it’s crucial that your photos are lit well. Small sensors typically found in phones are not very capable when lighting gets poor, so it’s always best to ensure your subject is well lit when taking a shot. If you can use your camera at ISO 100 or lower, you’ll see less grain in the resultant image, and photos will look clearer and more impressive.
One way to achieve better lighting for your smartphone photos is to get strong artificial lights, but this probably isn’t practical or worth it considering it’s not a DSLR. The flash also tends not to be so great, so you can rule that out as well. This leaves natural light as the best source, and there are a few tips to getting the best shots in the lighting you have.

Taken with the merely okay HTC One Mini camera. Placing the paperweight near a window helps improve lighting for a better photo.

Like when photographing with any camera, ideally the sun should be behind the camera’s lens, shining light onto the subject without entering the lens directly. Pointing a camera towards the sun will cause shadowing and a loss of contrast, so try not to do so unless you want the artistic effect. In cloudy conditions the sun can be diffused throughout the sky, so avoid shooting up to the sky if it’s not a sunny day.
As I mentioned earlier, it might also be worth exploring spot metering to get the exposure just right, especially when there’s strong backlighting. Ideally you wouldn’t be shooting when there’s strong backlighting as smartphone cameras typically have weak dynamic range, but sometimes it’s necessary. And sometimes you can experiment with reflective surfaces to get light in just the right positions: often a simple white piece of paper will suffice at directing light from the sun (or an artificial light) on to your subject.
Finally, as some bonus tips for you budding videographers out there, make sure that you set your smartphone to record at the maximum resolution possible. Many smartphones that record at 4K will default to 1080p, so changing the appropriate setting will lead to better quality videos. Another thing, try recording HDR or 60 frames per second video for better quality or smoother videos.

Saturday, 17 October 2015

Jet packs-A device of transportation in future


         
               



The future is going to be pretty awesome. Each one of us will have our own personal jet pack. Instead of a long, slow daily commute, we'll zip straight to work at 100 mph, skimming along the tree tops. Family vacations will include jet pack trips to scenic locations unmarred by roads. Workers will use jet packs to complete work in high places, such as inspecting bridge supports or even cleaning skyscraper windows.

Wait … weren't we saying this about the future more than 50 years ago? Wh­y has development of the jet pack been so slow? For many, this has been one of life's major disappointments. From the first promising flight tests in the 1940s, jet pack technology has hardly advanced at all. In fact, over the decades, jet packs have simply been unable to overcome some very fundamental problems. But it hasn't been all bad news. Along the way, jet packs have benefitted from several technological advancements, and they've even made a few high-profile appearances in the popular media.

With that said, is there any way that the average person will be able to get their hands on a real jet pack? Is it practical? Is it affordable?



Jet Pack or Rocket Pack?


Most of the ­devices we refer to as jet packs are actually rocket packs, sometimes called rocket belts. The difference between a rocket and a jet is significant. A jet intakes air, compresses it with a turbine and pushes it out the back, mixing it with fuel and combusting it in the process. The oxygen in the air is a key ingredient in the combustion phase, so a jet needs a constant air intake to work. A rocket carries all its fuel and oxidizer (which may be liquid oxygen or some other chemical), mixes them together and combusts them. No air intake is needed.

Turbojet packs



Depiction of a jetpack with folding wings
Packs with a turbojet engine are fueled with traditional kerosene-based jet fuel. They have higher efficiency, greater height and a duration of flight of many minutes, but they are complex in construction and very expensive. Only one working model of this pack was made; it underwent flight tests in the 1960s and at present it no longer flies. Jet packs and rocket packs have much better flight time on a tankful of fuel if they have wings like an aeroplane's.

Hydrojet packs



Jetlev water powered Jetpack

A Flyboard with its distinctive configuration of having the nozzles located below the pilot's feet
The 21st century has seen a new approach to jet packs where water is used as a high-density propulsion fluid. This requires a very large mass of fluid that makes a self-contained jetpack infeasible. Instead, this approach separates the engine, fuel and fluid supply from the pilot's flying apparatus, using a long flexible hose to feed the water to the jet nozzle pack attached to the pilot's body. These inventions are known as "hydro jet packs", and successful designs have used jetski technology as the powerplant operating in a body of water (an ocean, lake, or pool) to provide the needed propulsion. Several hydro jet pack approaches have been successfully tested and put into production. Flow rate can be controlled by a throttle operator on the jetski, or by the pilot using a remote actuator.

Another significant difference with hydro jet packs is that they can be operated below the surface as well as above it. As of 2013, many hydro jet pack rental businesses are operating in various locations around the world.


Friday, 16 October 2015

The top 5 future tech - Revolutionary technology for genext

Today’s post is about 5 upcoming, real-life products that is set to revolutionize the world as we know it. Get ready to control the desktop and slice Ninja fruits with your eyes. Get ready to print your own creative physical product. Get ready to dive into the virtual world, and interact with them. Come unfold the future with us

1. Google Glass

Augmented Reality has already gotten into our life in the forms of simulated experiment and education app, but Google is taking it several steps higher with Google Glass. Theoretically, with Google Glass, you are able to view social media feeds, text, Google Maps, as well as navigate with GPS and take photos. You will also get the latest updates while you are on the ground.

It’s truly what we called vision, and it’s absolutely possible given the fact that the Google’s co-founder, Sergey Brin has demo’ed the glass with skydivers and creatives. Currently the device is only available to some developers with the price tag of $1500, but expect other tech companies out and building an affordable consumer version.

2. Form 1


Just as the term suggests, 3D printing is the technology that could forge your digital design into a solid real-life product. It’s nothing new for the advanced mechanical industry, but a personal 3D printer is definitely a revolutionary idea.
Everybody can create their own physical product based on their custom design, and no approval needed from any giant manufacturer! Even the James Bond’s Aston Martin which was crashed in the movie was a 3D printed product!

Form 1 is one such personal 3D printer which can be yours at just $2799. It may sound like a high price but to have the luxury of getting producing your own prototypes, that’s a reaonable price.
Imagine a future where every individual professional has the capability to mass produce their own creative physical products without limitation. This is the future where personal productivity and creativity are maximized.

3. Oculus Rift



Virtual Reality gaming is here in the form of Oculus Rift. This history-defining 3D headset lets you mentally feel that you are actually inside a video game. In the Rift’s virtual world, you could turn your head around with ultra-low latency to view the world in high resolution display.
There are premium products in the market that can do the same, but Rift wants you to enjoy the experience at only $300, and the package even comes as a development kit. This is the beginning of the revolution for next-generation gaming.

The timing is perfect as the world is currently bombarded with the virtual reality topic that could also be attributed to Sword Art Online, the anime series featuring the characters playing games in an entirely virtual world. While we’re getting there, it could take a few more years to reach that level of realism. Oculus Rift is our first step.

4. Leap Motion


Multi-touch desktop is a (miserably) failed product due to the fact that hands could get very tired with prolonged use, but Leap Motion wants to challenge this dark area again with a more advanced idea. It lets you control the desktop with fingers, but without touching the screen.

It’s not your typical motion sensor, as Leap Motion allows you to scroll the web page, zoom in the map and photos, sign documentss and even play a first person shooter game with only hand and finger movements. The smooth reaction is the most crucial key point here. More importantly, you can own this future with just $70, a price of a premium PS3 game title!
If this device could completely work with Oculus Rift tribulate a real-time gaming experience, gaming is going to get a major make-over.

5. Eye Tribe



Eye tracking has been actively discussed by technology enthusiasts throughout these years, but it’s really challenging to implement. But Eye Tribe actually did this. They successfully created the technology to allow you to control your tablet, play flight simulator, and even slice fruits in Fruit Ninja only with your eye movements.
So, guys ready future.

Multifunctional Mouse Flips Open to Reveal Number Pad

Many laptops simply do not have the space to allocate to a normal number pad – something many of us are used to using on external keyboards or home computers. This simple-but-brilliant solution by Adesso combines keypad functionality to accommodate a traveler who does not wish to bring an entire extra keyboard.
Housed within clear plastic casing, the keypad not only ads a functional dimension to an ordinary mouse – it also makes use of the unerlying keys as an aesthetic expression of the multiple functions of this portable gadget. For those of us who like to crunch numbers on the go this is an essential mouse to pack along.