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27 Nov 2013

Gravity Screen - On / Off

 Gravity Screen - On / Off - screenshot

 Gravity Screen - On / Off




Using your phone often? Tired of the On-Off switching?
This app turns automatically your screen off when you put your phone into your pocket or onto a table and turn the screen on when you take it out or up. No need to touch any button and you are ready to go. 

It monitors the orientation of the device through the gravity sensor. When your phone is pointing downward by its top, below a certain angle, it's likely to be out of use. In this situation the proximity sensor is activated to determine if it is covered. If yes, the screen turns off because probably you placed the phone into your pocket or onto a table.
To keep the battery usage low the program turns on the proximity sensor only when it's really necessary. Moreover, when it turns your screen off and the proximity sensor is covered it puts your phone into deep sleep state to save as much energy as possible.
- Pocket Sensor: Recognizes if your phone is in your pocket.
- Table Sensor: Detects your phone is lying on a table and turns the screen off.
- Turn Screen On by Motion: If the screen is off and it's facing up the device can be woken up by any movements, for example lift up by hand.
- Keep Screen On by Motion: It's a Screebl like feature but it's relying on the small movements you are doing by your hand while holding the phone. If small motions are detected while the screen is facing up the feature keeps the screen on because it can be suspected that the phone is held and probably you are reading something. If the phone is steady the normal screen timeout will apply in any position you leave your device.
- Exclude Apps option: The app pauses itself anytime if selected app is running, it'll resume when you close the app. Useful when playing games etc.
- Tasker, Llama, Locale supported by plug-in.

It should be not significant. I experienced about 6 per cent extra consumption on the test device. However it can be much higher by often using the Turn Screen On by Motion feature. Thus, keep your phone face down if you want to save energy.
On some devices (e.g. HTC One) the alarm clock is switched off by the app after it had gone off! Please check if it's the case for you. If, yes, use a third party app, for example:
- The app was not widely tested. Hopefully it will work fine for you. But, if you experience any issue or just have a question, please email me.
In the Pro version the screen can be turned on by motion up to 16 hours instead of 15 minutes. Also, in the Pro version the Table sensor is more accurate. Unlock version has everything what Pro has plus it can be paused if any app running from the Exclude app list.
Q: The screen not always turns off when I put my phone into my pocket, why?
A:The proximity sensor not always accurate. It can fail recognizing some materials specially if they are very close to it. If it happens to you often, you can activate the False Turn-On Protection feature which effectively reduces the number of accidental wake-ups.
Q: I'm experiencing high battery usage, why?
A: The app should use about 6 percent extra energy per day if you are not using too much the Turn Screen On by Motion feature, for example keeping your phone face down when it's on a table. Moreover, please, keep in mind that the android en-built battery consumption measurement can show much higher results if it's based on a short period of time.

download this for ur phone


 Gravity Screen - On / Off - screenshot        Gravity Screen - On / Off - screenshot

4 Nov 2013

New Optical Disc

New Optical Disc Can Store Information “for a billion years” 




If you’ve been worried about how to preserve your digital records, you may soon be able to purchase a new optical disk that could store data for up to a billion years. To some this may seem hubristic, to others definitely not.
According to the latest gizmag report, a researcher at the University of Twente in the Netherlands has developed a new optical memory device made out of tungsten and silicon nitride that could store data for extremely long periods of time—up to a billion years.

Hard drives are very susceptible to external magnetic fields and mechanical failures, with a normal lifespan not much longer than 10 years; similarly CDs, DVDs and flash drives each have their own Achilles’ heel.
University of Twente researcher Jeroen de Vries set out to solve this problem by designing his own data storing device. For the materials he chose tungsten, which can withstand very high temperatures, encapsulated in silicon nitride, which is highly resistant to fracture and deforms very little when exposed to high levels of heat.
The disc, de Vries claims, is so sturdy that it could be used to store important data on the human race and retain it well past its extinction, for the benefit of whoever is left (of course, that’s assuming that the aliens, robots, or mutants will somehow know exactly how to decode the information on the disk in the first place)

From left to right: the QR codes after fabrication, after two hours at 613 K, and after two hours at 763 K (Image: de Vries/University of Twente)

Inside the device, information is stored by etching QR codes in tungsten – which can be easily decoded by today’s smartphones. This method is very resilient because the information is still preserved even when up to seven percent of the data has been compromised. Each pixel of the code also has within it a second set of much smaller QR codes, with pixels of only a few microns in size.
To find out how long the device could retain information, de Vries relied on the Arrhenius model, which simulates extended periods of time by exposing the device to predetermined levels of heat for a set amount of time.
The researcher heated the storage device to a temperature of 200 °C (400 °F) for one hour and noted no visible degradation, which according to the model simulates one million years of usage. The device only showed some signs of degradation once it was heated to much higher temperatures, around 440 °C (820 °F) – but even then, the tungsten was not harmed and the data was still readable.
Though the mathematical model used for testing was limited to exposure to high temperatures (and, as the researcher admits, may not be entirely accurate), de Vries says that if they can find a place that is very stable to store the device, such as a nuclear storage facility, then the disc and the data it contains still has all the requisites to last for extremely long periods of time, on the order of millions of years.


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