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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.


Papers
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Journal ArticleDOI
TL;DR: Genetic amniocentesis should be considered in women of any age when second-trimester ultrasonography reveals the presence of one or more of the following: fetal structural malformations, short femur (determined by biparietal diameter-to-femur length ratio), combination of short Femur and humerus, abnormal nuchal fold thickening, echogenic bowel, or short ear length.

163 citations

Patent
21 Sep 1999
TL;DR: In this paper, an interactive display of any portion of a spherical image is presented, where an input interface comprises a display including a magnification region and a directional cursor for pointing the direction to a next spherical image.
Abstract: Apparatus for interactive display of any portion of a spherical image preferably comprises a personal computer or other digital processor apparatus for storing digital data representative of at least one image having a 180 degree or greater field of view (or hemispherical image). In order to view a selected image portion without warp or distortion at the seam between opposite hemispherical images, edge filtering is applied to eliminate a halo effect. Moreover, an opposite hemispherical image may either be obtained by creating a mirror image of a first hemispherical image or by capturing a second hemispherical image by means of an oppositely directed camera and storing the digital image. Equations for image transformation are based on a lens' characteristics including the lens' radius R. An input interface preferably comprises a display including a magnification region and a directional cursor for pointing the direction to a next spherical image. “Hot spots” can be linked to audio, text, graphics, or other media or trigger a charge for a pay event or identify program links to the next spherical image.

162 citations

Journal ArticleDOI
TL;DR: An electronic funds transfer system (EFT) is described in which retail terminals located in stores are connected through a public switched telecommunication system to card issuing agencies data processing centers and users are issued with intelligent secure bank cards.
Abstract: Components of previous security systems were designed independently from one another and were often difficult to integrate. Described is the recently available IBM Transaction Security System. It implements the Common Cryptographic Architecture and offers a comprehensive set of security products that allow users to implement end-to-end secure systems with IBM components. The system includes a mainframe host-attached Network Security Processor, high-performance encryption adapters for the IBM Personal Computer and Personal System/2® Micro Channel®, an RS-232 attached Security Interface Unit, and a credit-card size state-of-the-art Personal Security™ card containing a high-performance microprocessor. The application programming interface provides common programming in the host and the workstation and supports all of the Systems Application Architecture™ languages except REXX and RPG. Applications may be written to run on Multiple Virtual Storage (MVS) and PC DOS operating systems.

162 citations

Journal ArticleDOI
TL;DR: In this article, a correction scheme was proposed to shift distorted MT curves to their correct values based on I-D inversion of a TEM sounding taken at the same location as the MT site.
Abstract: Surficial bodies can severely distort magnetotelluric (MT) apparent resistivity data to arbitrarily low frequen- ties. This distortion, known as the MT static shift, is due to an electric field generated from boundary charges on surficial inhomogeneities, and persists throughout the entire MT recording range. Static shifts are manifested in the data as vertical, parallel shifts of log-log apparent resistivity sounding curves, the impedance phase being unaffected. Using a three-dimensional (3-D) numerical modeling algorithm, simulated MT data with finite length electrode arrays are generated. Significam.staticshifts are produced in this simulation; however, for some geometries they are impossible to identify. Techniques such as spatial averaging and electromag- netic array profiling (EMAP) are effective in removing static shifts, but they are expensive, especially for correct- ing a previously collected MT data set. Parametric repre- sentation and use of a single invariant quantity, such as the impedance tensor determinant, are only useful in lim- ited circumstances and can lead the MT interpreter astray. Transient electromagnetic (TEM) sounding data are rela- tively inexpensive to collect, do not involve electric field measurements, and are only affected at very early times by surficial bodies. Hence, using TEM data acquired at the same location provides a natural remedy for the MT static shift. We describe a correction scheme to shift distorted MT curves to their correct values based on I-D inversion of a TEM sounding taken at the same location as the MT site. From this estimated 1-D resistivity structure an MT sounding is computed at frequencies on the order of 1 Hz and higher. The observed MT curves are then shifted to the position of the computed curve, thus eliminating static shifts. This scheme is accurate when the overlap region between the MT and TEM sounding is l-D, but helpful information can be gleaned even in multidimensional envi- ronments. Other advantages of this scheme are that it is straightforward to ascertain if the correction scheme is being accurately applied and it is easy to implement on a personal computer.

162 citations

Patent
12 Oct 1994
TL;DR: In this article, a multi-applications portable card that can be plugged in notably into a reader of a personal computer comprises a first connector designed for a connection with the reader and positioned on the periphery of a pack.
Abstract: A multi-applications portable card that can be plugged in notably into a reader of a personal computer comprises a first connector designed for a connection with the reader and positioned on the periphery of a pack. The portable card comprises, firstly, a mobile rack positioned on an edge of the card that gets fitted into a cavity of the pack, the mobile rack further including a housing provided with a bottom and designed to receive a chip borne by a token and, secondly, a second connector electronically linked to the first connector. The disclosed device can be applied in particular to PCMCIA cards.

162 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202310
202227
2021418
2020954
20191,407
20181,342