In particle physics, the tracking is the act of measuring the direction and magnitude of charged particlesmomenta. The particles entering a tracker (the device used for tracking), release part of their energy in the device: the tracker has to be finely segmented in order to be able to reconstruct with good precision where the particle passed. Since the tracking is usually made in a region where a magnetic field is present, it is possible to reconstruct part of the helix made by the particle inside the tracker (that is called track), and from the track parameters, and by knowing the mass of the particle under study (which is known by the use of particle identification), it is possible to reconstruct the actual direction and magnitude of the particle momenta. From these information the tracking of charged particles can be used to reconstruct secondary decays, this can be done for B-tagging (in experiments like CDF or at LHC) or to fully reconstruct events (like in BaBar and Belle).
Tracking, one of the first freefall skills learned by a novice skydiver, is the technique of assuming a body position that allows the skydiver to move horizontally while freefalling.
Although there are many variations of the basic body position it essentially involves the skydiver moving out of the traditional face to earth arched position, straightening the legs, bringing the arms to the sides and de-arching, using the body to cup the air as a means of providing greater lift. There is, however, debate over what exactly constitutes the most efficient tracking position (providing the best glide ratio) especially concerning how far (if at all) the skydiver's legs should be spread. Some variations of the tracking position work well for some individuals and not so well for others. Also, when a skydiver gains experience, his or her preferred body position often changes.
It is claimed that good trackers can cover nearly as much ground as the distance they fall, approaching a glide ratio of 1:1. It is known that the fall rate of a skydiver in an efficient track is significantly lower than that of one falling in a traditional face-to-earth position; the former reaching speeds as low as 90mph, the latter averaging around the 120mph mark.
Microsoft PowerPoint is a slide showpresentation program currently developed by Microsoft. PowerPoint initially named "Presenter", was created by Forethought Inc.. Microsoft's version of PowerPoint was officially launched on May 22, 1990, as a part of the Microsoft Office suite. PowerPoint is useful for helping develop the slide-based presentation format, and is currently one of the most commonly-used presentation programs available.
Originally designed for the Macintosh computer, the initial release was called "Presenter", developed by Thomas Rudkin and Dennis Austin of Forethought, Inc. In 1987, it was renamed to "PowerPoint" due to problems with trademarks, the idea for the name coming from Robert Gaskins. In August of the same year, Forethought was bought by Microsoft for $14 million USD ($29.2million in present-day terms), and became Microsoft's Graphics Business Unit, which continued to develop the software further. Microsoft's version of PowerPoint was officially launched on May 22, 1990, the same day that Microsoft released Windows 3.0.
As of January 10, 2012, support for Office 2004 for Mac has ended: no further updates or support will be provided from Microsoft.
Microsoft Office for Mac 2004 is available in three editions: Standard, Professional, and Student and Teacher. All three editions include Word, Excel, PowerPoint and Entourage. The Professional Edition adds Virtual PC. The Student and Teacher Edition cannot be upgraded, which means when a later version of Office is released, people who purchased the Student and Teacher edition must buy a new package.
Microsoft Office 2011 includes more robust enterprise support and greater feature parity with the Windows edition. Its interface is now more similar to Office 2007 and 2010 for Windows, with the addition of the Ribbon. Support for Visual Basic for Applications macros has returned after having been dropped in Office 2008 (). If you purchase the home premium version of Office for Mac you are not automatically allowed telephone support to query any problems with the VBA interface. There are however, apparently, according to Microsoft Helpdesk, some third party applications that can address problems with the VBA interface with Office for Mac. In addition, Office 2011 supports online collaboration tools such as OneDrive and Office Web Apps, allowing Mac and Windows users to simultaneously edit documents over the web. It also includes limited support for Apple's high-density Retina displays, allowing the display of sharp text and images, although most icons within applications themselves are not optimized for this.