Saturday, February 27, 2010
Internet Security- Take care of your computer's safety yourself!
Thursday, February 11, 2010
Google tools- Google Earth
- Flight Simulator:- Since Google Earth v4.2, a flight simulator has been included as a hidden feature (on version 4.3 and above it is not a hidden feature any more and can be accessed from the Tools menu). The Google Earth flight simulator features the ability to fly to any supported locations of the world. The pilot can choose any location to start a flight or attempt to land a flight in the world. Fly time is not very accelerated, as it takes the F-16 at highest speed at least 60 minutes to fly from coast-to-coast in the US. Aircraft can land on any level surface in the world (including under the ocean in Google Earth 5.0) as long as the aircraft is below 250knots and is falling at less than 610 m (2,000 ft) per minute when touching ground. However, with an extremely low descent rate, aircraft can land at as much as 600 knots. This requires an extremely long runway distance to stop safely. When landing at any speed higher than that, such as 700 knots, the aircraft's virtual nose gear will compress so much into the virtual fuselage that the simulator will tell the user that the plane has crashed. Here is a video on how to get started with the flight simulator.
- Sky Mode:- Google Sky is a feature that was introduced in Google Earth 4.2 on August 22, 2007, and allows users to view stars and othercelestial bodies.
- Street View:- Google Street View provides 360° panoramic street-level views and allows users to view parts of selected cities and their surrounding metropolitan areas at ground level.
- Ocean:- Introduced in version 5.0 (February 2009), the Google Ocean feature allows users to zoom below the surface of the ocean and view the 3D bathymetry beneath the waves. Supporting over 20 content layers, it contains information from leading scientists and oceanographers. On April 14, 2009, Google added underwater terrain data for the Great Lakes.
- Historical Imagery:- Introduced in version 5.0, Historical Imagery allows users to traverse back in time and study earlier stages of any place. This feature is very useful for research purposes that require analysis of past records of various places.
- Mars:- Google Earth 5 includes a separate globe of the planet Mars, that can be viewed and analysed for research purposes. The maps are of a much higher resolution than those on the browser version of Google Mars and it also includes 3D renderings of the Martian terrain. There are also some extremely high resolution images from the Mars Reconnaissance Orbiter's HiRISE camera that are of a similar resolution to those of the cities on Earth. Finally, there are many high resolution panoramic images from various Mars landers, such as the Mars Exploration Rovers, Spirit and Opportunity, that can be viewed in a similar way to Google Street View. Interestingly enough, layers on Google Earth (such as World Population Density) can also be applied to Mars. Layers of Mars can also be applied onto Earth. Mars also has a small application found near the face on Mars. It is called Meliza, and features a chat between you and an automatic robot speaker. It is useful for research on Mars, but is not recommended for normal conversations.
- Moon:- On July 20, 2009, the 40th anniversary of the Apollo 11 mission, Google introduced the Google Earth version of Google Moon, which allows users to view satellite images of the Moon. It was announced and demonstrated to a group of invited guests by Google along with Buzz Aldrin at the Newseum in Washington, D.C.
Saturday, February 6, 2010
Microsoft Surface Technology - What Is It And Can It Help E-Learning?
Microsoft notes four main components being important in Surface's interface: direct interaction, multi-touch contact, a multi-user experience, and object recognition.
Direct interaction refers to the user's ability to simply reach out and touch the interface of an application in order to interact with it, without the need for a mouse or keyboard. Multi-touch contact refers to the ability to have multiple contact points with an interface, unlike with a mouse, where there is only one cursor. Multi-user is a benefit of multi-touch -- several people can orient themselves on different sides of the surface to interact with an application simultaneously. Object recognition refers to the device's ability to recognize the presence and orientation of tagged objects placed on top of it.
The technology allows non-digital objects to be used as input devices. In one example, a normal paint brush was used to create a digital painting in the software. This is made possible by the fact that, in using cameras for input, the system does not rely on restrictive properties required of conventional touchscreen or touchpad devices such as the capacitance, electrical resistance, or temperature of the tool used (see Touchscreen).
The computer's "vision" is created by a near-infrared, 850-nanometer-wavelength LED light source aimed at the surface. When an object touches the tabletop, the light is reflected to multiple infrared cameras with a net resolution of 1024 x 768, allowing it to sense, and react to items touching the tabletop.
Surface will ship with basic applications, including photos, music, virtual concierge, and games, that can be customized for the customers.
A unique feature that comes preinstalled with Surface is the pond effect "Attract" application. Simply, it is a "picture" of water with leaves and rocks within it (a lot like a screen saver used in Windows XP or Vista). By touching the screen, users can create ripples in the water, much like a real stream. Additionally, the pressure of touch alters the size of the ripple created, and objects placed into the water create a barrier that ripples bounce off, just as they would in real life.
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