This paper presents a hierarchical model for a catenet environment. The model consists of three levels of models, and it reflects the end to end delay between two host computers each connected to a different LAN. The two LANs are connected via gateways by a WAN. The model incorporates a basic flow control mechanism, standardized local area network behaviour, as well as gateway functions in terms o

Ever since the first three-dimensional computer graphics appeared half a century ago, the goal has been to model and simulate how light interacts with materials and objects to form an image. The ultimate goal is photorealistic rendering, where the created images reach a level of accuracy that makes them indistinguishable from photographs of the real world. There are many applications ñ visualizati

We consider the problem of deriving optimal marketing policies for the spread of innovations in a social network. We seek to compute policies that account for i) endogenous network influences, ii) the presence of competitive firms, that also wish to influence the network, and iii) possible uncertainties in the network model. Contrary to prior work in optimal advertising, which also accounts for ne

Note on the bad habit at universities and/ or university colleges not properly to advertise new academic jobs.

BACKGROUND: The incidence of fragility fractures has increased during the last half of the 1990's. One important determinant of fractures is the bone mineral content (BMC) or bone mineral density (BMD), the amount of mineralised bone. If we could increase peak bone mass (the highest value of BMC reached during life) and/or decrease the age-related bone loss, we could possibly improve the skeletal

BACKGROUND: Urothelial carcinomas originate from the epithelial cells of the inner lining of the bladder and may appear as single or as multiple synchronous tumors. Patients with urothelial carcinomas frequently show recurrences after treatment making follow-up necessary. The leading hypothesis explaining the origin of meta- and synchronous tumors assumes a monoclonal origin. However, the genetic

Tegeltillverkning i Skåne i början på 1900-talet beskriven med hjälp av dokumentation förvarad på Folklivsarkivet.

West Greenlandic Eskimo vowel spectra were investigated in carefully pronounced words and in continuous speech, and spectral differences were observed between the two situations. Spectra were compared in two consonantal environments - pharyngeal (uvular) and non-pharyngeal. In order to reconstruct vowel articulations, spectra were referred to nomograms from the three-parameter model of vowel artri

The propagation channel determines the fundamental basis of wireless communications, as well as the actual performance of practical systems. Therefore, having good channel models is a prerequisite for developing the next generation wireless systems. This thesis first investigates one of the main channel model building blocks, namely clusters. To understand the concept of clusters and channel chara

Kulturartikel om Clint Eastwood som ikon i film och politik med utgångspunkt för en rad nyutkomna böcker och aktuella webbsajter om honom.