338 results found displaying 10-12
    
imax500
 Australia
Responsible Use of Firearms Device Printer Friendly Version
Firearm misuse is rife throughout the world, especially in the USA where gun deaths number in the tens of thousands per annum. Where an outright ban of guns is not feasible, nor is a ban of ammunition, systems are needed that ensure that guns are used for their intended peaceful purpose, eg hunting. This is especially so in jurisdictions, such as Western Europe and Australasia, where the use of guns in self-defence may not constitute a legal defence against a criminal prosecution for manslaughter. Also in these jurisdictions often the licensing of firearms is restricted to specific functions, such as hunting or rifle-range activities, and the use of guns for other purposes is expressly banned.
There has been much focus on the use of gun control to limit the use of illegal use of guns. This invention describes a smart system with position and time detectors that limit the use of guns to their licensed purpose and place.
First, gun users and guns must be licensed with relevant and authorities and the licenses will include conditions of the use of each gun, e.g. specific locations (e.g. shooting range, forest etc) where the gun can be discharged, specific times and dates when the gun can be discharged (e.g. a specific hunting season, rifle range opening times) and the like.
The key is for the gun to be only to be able to be used at (a) a certain place as determined by sensors, e.g. GPS or proxies such as cell network triangulation or other, (b) certain times and date as determined by any computer enabled clock but that is also contained in any processor.
Examples include where the gun can have incorporated in it a GPS sensor such that the position of the gun can be communicated to an internet service controlled by the government authorities. This gun may also have an internet wireless communication capability built in.
Alternatively, the user may have a special application on their smartphone that also has an Internet communications capability and a GPS sensor in it and means to communicate via, say Bluetooth to the gun, detecting the co-location of the gun, the user and the smartphone, thereby placing the user and the gun together in a specific place at a specific time.
Alternatively the smartphone may have a secure application built in which has in it the user privileges downloaded (and updated as required) thereby not requiring the smart phone to communicate to a database via the internet. This model might be preferred when gun use is in places such as wild forest where internet phone coverage is poor.
Alternatively the gun may incorporate both the GPS sensor and the smart application, and thus be an independent device. It may from time to time require that updates of software or database information en loaded onto it via a local wireless or even a plug-in communication device, but its use can be independent of these communication requirements.
Each gun would have a secure unique ID as would the smartphone app if used.
By these means the user of the gun will have unimpeded use of the gun for lawful and licensed activity. However the gun, if for example, is stolen will not be able to be used since it cannot be discharged without, for example, the smartphone tethered app with accompanying permissions for legal discharge based on time and place. Even if stolen, in the case of the smartphone app, the smartphone app would require a secure password entry before opening and allowing gun use.
For authorities this system also enables them to monitor gun use and control and possibly intervene to disable a gun when the user is using the gun illegally for any reasons. It would also allow authorities to track gun use and transport, and develop algorithms which correlate illegal gun use patterns, allowing for early intervention.

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basilg
 Russia
Modifiable keyboard layout backlight Printer Friendly Version
Working as a programmer (and not only) in non-English speaking country makes one switch (rather often) the keyboard layout - from English to native language and back. And very often while typing fast, how irritating it is to 'discover'
that you actually haven't switched. If there were a keyboard that would illuminate the current assignment of keys
(English or native language) it would kill two birds with one stone: help using keyboard at night and save time and nerve for those using two languages alternately and switching between them.
Reward: a keyboard described above 

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29°

    
CARRUTHERS
 United Kingdom
Small Scale Desalination Dome Printer Friendly Version
There are many types of solar powered desalinators being suggested, some even patented, but the one I am considering should be cheapest to build and run for very small scale or local uses, and easiest to use in areas of strong sunlight and salt water supply, such as coastal areas or brackish lakes.
Design:
A dome of clear material is placed over a pool of saline water, such as on a quiet coastal strip or brackish lake. The edges of the dome are submerged to several inches but is open underneath.
Inside the dome a mat black ceramic tile is placed angled so the flat facing is towards the prevailing sunlight direction. At the top of the dome a tube is connected and is angled towards the ground some distance away. At the other end of the tube, preferably below ground level, is a cooling radiator, and collection sump. These are protected from the sun but, like a weather station may be open to the winds. The radiator extends upwards and projects a couple of meters above the ground level to catch the winds.
At the opening to the tube, just at the top of the dome, is an impeller or fan, which is connected to a small fan on the outside of the tube.
The impeller is also connected to a small pump and tube inside the dome, behind the ceramic plate, that takes water from the saline pool and discharges onto the top of the tile.
Operation:
Sunlight heats up the air in the dome and the black ceramic plate until it becomes hot enough to boil a thin film of water passing across its surface.
A combination of winds on the external fan, and internal pressure increase from the heated air within the dome, turns the impeller and activates the pump to pump a small amount of salt water up the pipe and discharges it across the face of the ceramic tile.
As the water on the tile evaporates into steam, the increased pressure drives the impeller in the tube and pumps more water onto the tile. The flow of water on the tile washes away any salt residue to keep the tile clean.
Steam from the dome flows down the tube from the impeller to the cooling radiators, held below ground level or protected under a cover. Winds, and the effect of cooler temperatures at sub-ground levels, condenses the steam which collects in the sump, ready for collection or piping away for use. Excess heat is lost to the atmosphere through the elevated radiator surfaces.
By being open ended at below the water surface the design allows the concentrated saline to flow away from the dome, whilst the salt water level keeps a pressure seal for the domes atmosphere to heat up and expand through the tube and impeller.

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33°

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