Topic
Personal computer
About: Personal computer is a research topic. Over the lifetime, 58809 publications have been published within this topic receiving 800814 citations. The topic is also known as: PC.
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Patent•
28 May 1998
TL;DR: In this article, an electronic reading system is disclosed which allows users to download books and other types of content to a hand-held reader device for viewing, using software which runs on a personal computer (PC), the user can download titles from Internet sites to the PC.
Abstract: An electronic reading system is disclosed which allows users to download books and other types of content to a hand-held reader device for viewing. Using software which runs on a personal computer (PC), the user can download titles from Internet sites to the PC. Titles are then automatically transferred to the device when the device is placed in a cradle which is connected to the PC. Using the device's touch-sensitive display and graphical user interface, the user can access various software-implemented features associated with the display and management of the content. One feature is a user-definable hotkey that can be "dragged and dropped" onto a menu item to create a shortcut to that item. Another feature allows the user to tap twice on a displayed word to cause the device to look the word up in a pre-specified or default reference title, such as a dictionary or an encyclopedia. Another feature allows the user to block a passage on the touch-sensitive display and then specify one or more destinations (email addresses, file folders, fax numbers, printers, etc.) for routing the passage; when the device is subsequently placed in the cradle, the passage is automatically retrieved by the PC and routed to the specified destination(s). The device also implements a user interface feature for allowing the user to rapidly and conveniently adjust the orientation of the displayed title.
135 citations
TL;DR: Calculations in Gaussian optics should be replaced by state‐of‐the‐art numerical methods, which can be run on any standard personal computer.
Abstract: Purpose To improve accuracy in intraocular lens (IOL) calculations and clarify the effect of various errors. Setting University eye hospitals, Mainz, Germany, and Vienna, Austria. Methods A numerical ray-tracing calculation has been developed for the pseudophakic eye. Individual rays are calculated and then undergo refractions on all surfaces of the IOL and cornea. The calculations do not use approximations; ie, the refractions are calculated exactly using Snell’s law. Rays can be calculated for any distance from the optical axis and for other parameter variations. The effects of aspheric surfaces can also be investigated. Instead of IOL powers, manufacturers’ IOL data (radii, refractive index, thickness) are used in the calculations for different IOL types. The resulting optical quality is visualized by using Landolt rings superimposed on the grid of retinal receptors. Results Intraocular lens design, corneal asphericity, and specific spherical aberration influence the visual quality of the pseudophakic eye significantly. The IOL refractive power is an ambiguous parameter that cannot characterize the visual outcome sufficiently accurately for an IOL implanted at a given position. The effects can be calculated only in numerical ray tracing, not in Gaussian optics. The accuracy of numerical ray tracing is independent of axial length. Therefore, very long or very short eyes gain the most from the higher accuracy of this approach. For average-size eyes, however, the results are the same as with SRK calculations. Conclusion Calculations in Gaussian optics should be replaced by state-of-the-art numerical methods, which can be run on any standard personal computer.
135 citations
TL;DR: In this paper, an integrated model for the personal computer is presented, in which a variety of preventive and control strategies with respect to foot-and-mouth disease (FMD) in Dutch cattle and pig herds were examined economically.
135 citations
Patent•
21 Dec 1992
TL;DR: In this paper, a portable computer has a hinge assembly which allows the cover and display screen to be tilted from the base of the portable computer and then swiveled about a vertical axis.
Abstract: A portable computer having a hinge assembly which allows the cover and display screen to be tilted from the base of the portable computer and then swiveled about a vertical axis. One hinge is provided at the rear edge of the base of the portable computer about which the cover both tilts and swivels. The hinge assembly includes stops which limit the amount of tilt and swivel. The cover of the personal computer may be tilted backwards from a closed position to 115° and swiveled 30° from a straight-forward position.
135 citations
01 Nov 1987
TL;DR: The basic principles of Guide are evaluated, the interplay between the product and the continuing hypertext research programme is described, and the interplays between users and authors are described.
Abstract: The Guide system is a successful commercial product that originally came out of some ideas of a research project Unlike many other hypertext systems, Guide is aimed at naive users and authors in the personal computer market This paper evaluates the basic principles of Guide, and describes the interplay between the product and the continuing hypertext research programme
135 citations