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Träfflista för sökning "WFRF:(Persson Fredrik) ;srt2:(2000-2004)"

Sökning: WFRF:(Persson Fredrik) > (2000-2004)

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11.
  • Hallén, Anders., et al. (författare)
  • Ion implantation of silicon carbide
  • 2002
  • Ingår i: Nuclear Instruments and Methods in Physics Research Section B. - 0168-583X .- 1872-9584. ; 186, s. 186-194
  • Tidskriftsartikel (refereegranskat)abstract
    • Ion implantation is an important technique for a successful implementation of commercial SiC devices. Much effort has also been devoted to optimising implantation and annealing parameters to improve the electrical device characteristics. However, there is a severe lack of understanding of the fundamental implantation process and the generation and annealing kinetics of point defects and defect complexes. Only very few of the most elementary intrinsic point defects have been unambiguously identified so far. To reach a deeper understanding of the basic mechanisms SiC samples have been implanted with a broad range of ions, energies, doses, etc., and the resulting defects and damage produced in the lattice have been studied with a multitude of characterisation techniques. In this contribution we will review some of the results generated recently and also try to indicate where more research is needed. In particular, deep level transient spectroscopy (DLTS) has been used to investigate point defects at very low doses and transmission electron microscopy (TEM) and Rutherford backscattering spectrometry (RBS) are used for studying the damage build-up at high doses.
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14.
  • Magnusson, Alf, 1958, et al. (författare)
  • A Comparison of Spray Properties for Model Fuel and Diesel Using Several Optical Methods
  • 2004
  • Ingår i: 19th Ilass Europe.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Many experiments are carried out using a model fuel, for instance for measurement technique reasons. These data are usually transferred to situations where standard diesel fuel is used. The objective of this work is to characterize the liquid and vapour phase penetration of two different diesel fuels, one two-component model fuel, IDEA (70% n-decane and 30% α-methylnaphthalene) and one standard diesel fuel (Swedish Environmental Class I), when injected into air with density corresponding to early injections up to self ignition conditions in diesel engines. The experimental study was carried out in the high-pressure, high-temperature (HP/HT) spray rig at Chalmers, which was pressurized in the range of 4 to 85 bar and with temperature ranging from 400 to 800 K.A common-rail injection system with a single hole nozzle was used. Several optical methods (Schlieren, Shadowgraph, LIF (Laser Induced Fluorescence) and Mie-scattering) were used together or separately which allow a comparison of the output. Phase Doppler Anemometry (PDA) was used for the two fuels as a complement to the planar methods. Results from measurements show that there are differences in liquid penetration, fuel vaporization and droplet distribution in between the fuels and relatively good agreement between the methods
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  • Olhager, Jan, 1955-, et al. (författare)
  • Supply chain impacts at Ericsson - From production units to demand-driven supply units
  • 2002
  • Ingår i: International Journal of Technology Management. - 0267-5730 .- 1741-5276. ; 23:1-3, s. 40-59
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper deals with the impact of supply chains on operations management at Ericsson Mobile Communications. It specifically deals with the transition of the Link÷ping plant from being a production unit to the role of a supply unit in a demand-driven supply chain. This change has had a great impact on many factors. We discuss and analyse the most important issues. These are related to supply chain structure and flexibility, reengineering the information flow, the management of the supply process, and performance measurement.
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  • Orremo, Fredrik, et al. (författare)
  • E-Business in a Vendor-Customer Interface: Implications for Logistics Concerning Physical Distribution and Information Management
  • 2003
  • Ingår i: [Host publication title missing].
  • Konferensbidrag (refereegranskat)abstract
    • In today’s business environment the use of e-business is gradually becoming more common. This paper sets out to highlight the implications for logistical operations and possible future developments in a vendor-customer relationship (B2B environment) when e-business is introduced. The paper implies that use of an e-business solution does not necessarily mean any changes in the physical distribution. It also shows that reality does not always correspond to the expectations of bypassing different functions in the supply chain. Both case studies show a change in the information flow but the different steps the information goes through remain the same; hence, no prior steps are bypassed with the e-business solution. However, value can be added to the vendor-customer relationship, i.e. increased information, online tracking of orders etc.
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  • Resultat 11-20 av 46
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