Push Communication Services: a Short History, a Concrete Experience and Some Critical Reflections
نویسندگان
چکیده
This article presents some reflections on the development of push services and technologies over the Internet, based on work done by the authors in the Swisscast research project from 1997 to 2000 (www.swisscast.net). About five years ago push services were seen as a major trend in Internet communication. Users so it seemed would simply have to subscribe to a series of these services; then, they would receive all new information "just in time" on their computer in a suitable format. However, the actual development has been quite disappointing: despite some initial success, almost all of these services and software tools have been discontinued (see section 1). While one could simply dismiss push as a short-lived fashion, our experience in developing a push service (see section 2) and theoretical reflections (see section 3) show that services that organise contents and deliver them to subscribers may correspond to a real need of communication on the Internet and, thus, may have a real market opportunity.
منابع مشابه
Seismic Vulnerability Assesment of Jacket Type Offshore Platforms
Most of oil and gas offshore platforms are located in the seismic regains. So, Seismic vulnerability evaluation of the offshore platforms is one of the most important and vital issues in the structural systems. In this study, jacket type offshore platforms are studied by incorporating the pushover analyses and nonlinear time history analyses, in such a way that, first some push over analyses ar...
متن کاملSeismic Reliability Evaluation of the Jacket Structure of an Offshore Platform Based on Nonlinear Time History Analyses
Regarding the previous earthquake damages in offshore structures, as vital structures in the oil and gas industries, it is important that their seismic design will be performed with very high reliability. Accepting the Nonlinear Time History Analyses (NLTHA) as the most reliable seismic analysis method, in this paper an offshore platform of jacket type with the height of 304 feet and with a dec...
متن کاملEffect of the Concrete Strength on the Concrete-Steel Bond in Concrete Filled Steel Tubes
In this study, the concrete-steel bond strength of concrete filled cylindrical steel tubes has been experimentally investigated. 22 short, high strength and normal concrete filled circular steel tubes were tested. Push-out test was carried out as the common method to evaluate the bond carrying capacity. Four different concrete mixes were used in preparing the specimens. The steel tubes were w...
متن کاملTesting and numerical modelling of Steel-Concrete-Steel with stud bolts connectors subject to push-out loading
Steel-concrete-steel (SCS) sandwich panels are composed of two steel plates with low thicknesses and high densities and strengths and one thick layer between both plates with low strength and density known as core that is composed of concrete. Cohesive material-epoxy resin or shear connectors are usually used to connect the plates to the concrete core. SCS sandwich composites are being develope...
متن کاملPush-over analysis of concrete gravity dams due to flood inflow
This study numerically predicts the failure scenario of a cracked concrete gravity dam through a push-over nonlinear analysis. The mixed-mode Linear Elastic Fracture Mechanics (LEFM) was employed using the extended finite element method (XFEM). The dam base was considered to be fully fixed without any foundation effects. The hydrostatic pressure on the dam's upstream face was increased incremen...
متن کامل