We demonstrate a mesoscopic spin polarizer/analyzer system that allows the spin polarization of current from a quantum point contact in a large in-plane magnetic field to be measured. A transverse electron focusing geometry is used to couple current from an emitter point contact into a collector point contact. At large in-plane fields, with the point contacts biased to transmit only a single sp...

We show the difficulties that arise for the implementation of a real-time garbage collector in a multi-threaded system. A mechanism for synchronization between threads and the garbage collector activities is proposed for a single processor system. It is shown how this mechanism can be used to maintain exact information on roots, to implement efficient write-barriers, to do incremental or even c...

A new garbage collection algorithm for distributed object systems, called DMOS (Distributed Mature Object Space), is presented. It is derived from two previous algorithms, MOS (Mature Object Space), sometimes called the train algorithm, and PMOS (Persistent Mature Object Space). The contribution of DMOS is that it provides the following unique combination of properties for a distributed collect...

It is challengeable to utilize and integrate RFID data into current Enterprise Information Systems because high volume of RFID data is captured at high speed and the data are in heterogeneous formats. In this paper, we propose a “store and forward” and subscriptionbased integration approach in WinRFID Data Collector to solve the challenges. The Data Collector is a middleware which processes and...

In the present work the efficiency of a solar parabolic trough has been investigated experimentality. parabolic trough solar collector constitute a proven source of thermal energy for industrial process heat and power genaration. The impact of  using the partially porous media in the absorber on the efficiency of PTC (parabolic trough collector) has been investigated. The porosity of copper foa...

In this research, cerium recycling was studied by Adsorbing Colloid Flotation (ACF). Ten important parameters including collector type and dosage, cerium and colloid concentrations, frother type, activator type, preparation and frothing time, air flowrate and pH, each in two levels, were investigated. Statistical design of experiment was implemented for process modelling and analysis of var...

R efuse is collected all around the world. The following collecting methods are mentioned in the literature: bags (plastic and paper), bins (110–150 l), drums (110–210 l), twowheeled containers (80–360 l), and four-wheeled containers (300–1800 l). Over all, the job of a refuse collector can be characterised by frequent lifting, carrying, pushing, and/or pulling of heavy objects. In the Netherla...

An oldest-first generational garbage collector leaves intact the most recently allocated object space, and instead collects the remaining, older objects. Because these older objects have had more time to die, an oldestfirst copying collector will generally do less copying that a traditional generational collector (which operates youngest-first), a non-generational collector, and even Clinger an...