We present a measurement of the rate of gluon splitting into bottom quarks, g → bb̄, in hadronic Z decays collected by SLD from 1996 to 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. A topological vertex mass technique was used to tag the two jets with the smallest angle between them as b/b̄. We obtained a rate of g → bb̄ per hadr...

We consider combinatorial problems motivated by sensor networks for beacon-based point-to-point routing and covering. A beacon b is a point that can be activated to effect a ‘magnetic pull’ toward itself everywhere in a polygonal domain P . The routing problem asks how many beacons are required to route between any pair of points in a polygonal domain P . In simple polygons with n vertices we s...

The 2 major treatment approaches for congenitally missing maxillary lateral incisors are space closure via orthodontic therapy, or space opening to allow prosthodontic replacements either with a fixed prosthesis or single-tooth implant. Both of these treatment approaches can potentially compromise aesthetics, periodontal health, and function. It is essential for an interdisciplinary dental spec...

Traditionally designers have explored the aesthetics of interaction through the relationship between the product form and the activity people use it for. However, in the increasing complexity of interconnected and multi-activity devices in the home, aesthetics have been sacrificed in a move to increase usability. In this paper we present an emerging theory that interaction designs that take a c...

OBJECTIVES To compare cleft lip and palate patients' satisfaction with aesthetics and functional parameters after conventional advancement of the maxilla or by the use of distraction osteogenesis. MATERIAL AND METHODS Case series observational study. Group of distraction osteogenesis (DO) consisted of 15 patients treated with distraction osteogenesis while group conventional (CONV) included 1...

BACKGROUND Several aesthetic indexes have been described to assess implant aesthetics. The aim of this study was to compare the aesthetic assessment made by dental professionals and students of single-tooth implants placed in the upper incisors. MATERIALS AND METHODS A cross-sectional survey study using a subjective questionnaire to assess the aesthetics in 3 implant supported single-tooth ca...

UNLABELLED A longitudinal field experiment was carried out over a period of 2 weeks to examine the influence of product aesthetics and inherent product usability. A 2 × 2 × 3 mixed design was used in the study, with product aesthetics (high/low) and usability (high/low) being manipulated as between-subjects variables and exposure time as a repeated-measures variable (three levels). A sample of ...

Aesthetics is a subject receiving increasing attention in the design of pervasive information systems. One reason is the realisation that existing approaches centred on usability and utility do not seem to cover aspects of use essential to the realm of the everyday. Another reason aesthetics enters the picture is that by leaving the established domain of personal computing, pervasive informatio...

Samuel Johnson, the colourful 18th-century English lexicographer, asserted that ‘No man but a blockhead ever wrote, except for money’ (Boswell, 1934). Since unlikely to be applicable to the two books discussed here, Dr Johnson’s quip leads one to seek alternative motives and ask what led the authors to write these books, and why and for whom each book was written. Dealing first with what inspir...