smd and gate array. new integration technologies in electronics. i

progress in printed circuit board and integrated circuit miniaturisation has contributed to surface mounting of electronic components and the use of asics in custom circuits. surface mount, thick film, hybrid, thin film, asic, gate array, standard cell, full custom circuit, and programmable array logic technologies are briefly explained. ..

medical image communication using halftone algorithms

physicians frequently need to see retinal, biopsy, and other images, produced originally by medical diagnostic equipment and then processed by computers. at present this is done using either time-consuming photography or expensive video equipment. the authors have used digital halftoning as a method for fast communication of images both o..

sbc (sbc 286 at, ibm pc at clone)

the sbc 286at is a conventionally configured taiwanese-made pc at clone' hard disk (20 mb on the base model), a single high capacity floppy (1.2 mb), a generous megabyte of ram, a 10 mhz 80286 processor, mono screen (with cga and ega graphics standard options), printer and two serial ports, eight expansion slots (six of them 16-bit): in f..

pc-to-fax saves more than nickels and dimes

f.w. woolworth, manhattan, is exploring cost-effective electronic mail schemes. among the chosen is a pc-based communications package that allows pc-users to send documents directly to the firm's facsimile machines. called gammafax, the product, from gammalink, palo alto, ca, is a hardware/software package for the ibm pc, xt, at, and comp..

p/sup +/n n/sup +/ and pin low cost silicon solar cell technology

the results of a study into the fabrication of silicon solar cell panels using only simple techniques is presented. spin-on diffusion sources were used to form the junctions, while silk screen printing was employed forming the cell contacts. the photovoltaic diode developed during the course of the work has a p/sup +/n n/sup +/ structure ..

the differential effect of optic nerve disease on pattern and focal electroretinograms

the authors studied nine cases of retrobulbar neuritis with confirmed multiple sclerosis and six cases of optic atrophy from other causes. pattern and focal electroretinograms (macular ergs) were recorded with high (400 cd/m/sup 2/) and low (40 cd/m/sup 2/) intensity stimuli. contrast sensitivity was also measured with simple printed test..

cataloging a special art collection

since 1986, a project has been underway to catalog a private collection of the massive body of work of the artist anne ward huey the project has progressed from a handwritten card file to a computer file using aacr 2 and oclc tags and format. a compact disc or videotape file is also presently projected. in addition to taking traditional l..

egg-laying wool-bearing milk-giving sow (image processing terminal)

the author tests the guis teller fax 207 image processing terminal, which is not only a facsimile transceiver but also a scanner, printer and copier. the 207 needs an ibm pc/xt/at and ms-dos 2.0 or ms-windows, costs 5000 dm, scans with a resolution of 200 dpi horizontally and 100-400 dpi vertically, sends at 4800 baud and uses special the..

easy-pc (circuit cad package)

easy-pc, offered by number one systems, is a software package for board design and circuit drawing, which copes with up to eight track layers. the complete package consists of one main component, easy-pc itself, and two optional subsidiary programs' easy-plot and easy-gerb. easy-plot is a post-processor for printing stored pcb or schemati..

novel preparation methods for high t/sub c/ oxide superconductors

high t/sub c/ oxide superconductors can be prepared by a variety of novel metallurgical or ceramic processing techniques. for example, forming metallic precursors of yba/sub 2/cu/sub 3/ or reba/sub 2/cu/sub 3/, where re is a rare earth element, followed by oxidation has yielded the corresponding ceramic oxide in pellet, wire, and thin fil..