We surveyed 470 Amazon.com merchants regarding their experience, knowledge and perceptions of digitally-signed email. Some of these merchants (93) had been receiving digitally-signed VAT invoices from Amazon for more than a year. Respondents attitudes were measured as to the role of signed and/or sealed mail in e-commerce. Among our findings: 25.2% of merchants thought that receipts sent by onl...

Let C be a binary linear self-dual doubly-even code of length n and minimal weight d. Such codes exist only if 12 = 0 (mod 8). We put II = 24r + 8s, s = 0, 1, 2. It follows from the work of Gleason [2] and of Mallows and Sloane [6] that d s 4r + 4. C is called extremal if d = 4r + 4. In the following, an extremal code means a binary linear self-dual doubly-even extremal code. We use the set-the...

PURPOSE To select, digitally record, evaluate, and psychometrically equate word recognition materials that can be used to measure the speech perception abilities of native speakers of Taiwan Mandarin in quiet. METHOD Frequently used bisyllabic words produced by male and female talkers of Taiwan Mandarin were digitally recorded and subsequently evaluated using 20 native listeners with normal h...

The aim of this article is to explain the use of a computer-aided three-dimensional planning protocol in combination with previously placed mini-implants and computer-aided design/computer-assisted manufacture (CAD/CAM) technology to restore a completely edentulous patient. Mini-implants were used to establish a setup for computerized tomographic imaging and a surgical template. The software an...

We show that the ring of the weight enumerators of a self-dual doubly even code dn in arbitrary genus is finitely generated. Indeed enough elements to generate it are given. The latter result is applied to obtain a minimal set of generators of the ring in genus two.

Text gathered from a variety of different sources may not be immediately readable by a computer. First, the data itself might be pictures of text taken from an archive or hand-written manuscripts that are not yet digitized. In these cases, Optical Character Recognition (OCR) technologies may be required. Even if they have been digitized, texts may be stored digitally using different encodings a...