Search for dissertations about: "PDC"

Showing result 1 - 5 of 38 swedish dissertations containing the word PDC.

2. 1. On-demand Restricted Delegation : A Framework for Dynamic, Context-Aware, Least-Privilege Delegation in Grids

   Author : Mehran Ahsant; Lennart Johnsson; Marty Humphrey; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Grid Security; Restricted and Context-Aware Delegation; Delegation Protocol; On-demand Delegation; Dynamic Trust Federation; Grid Interoperability; Credential Mapping; Computer science; Datalogi;

   Abstract : In grids, delegation is a key facility that can be used to authenticate and authorize requests on behalf of disconnected users. In current grid systems,delegation is either performed dynamically, in an unrestricted manner, or by a secure but static method. READ MORE

4. 2. Security and Privacy of Sensitive Data in Cloud Computing

   Author : Ali Gholami; Erwin Laure; Seif Haridi; Schahram Dustdar; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cloud Computing; Security; Privacy; Trust; Opertaing System; Computer Science; Datalogi;

   Abstract : Cloud computing offers the prospect of on-demand, elastic computing, provided as a utility service, and it is revolutionizing many domains of computing. Compared with earlier methods of processing data, cloud computing environments provide significant benefits, such as the availability of automated tools to assemble, connect, configure and reconfigure virtualized resources on demand. READ MORE

5. 3. Distribution and Long-term Effects of the Environmental Neurotoxin β-N-methylamino-L-alanine (BMAA) : Brain changes and behavioral impairments following developmental exposure

   Author : Oskar Karlsson; Eva Brittebo; Nils Gunnar Lindquist; Erika Roman; Sandra Ceccatelli; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ALS PDC; Guam; Developmental neurotoxicity; Brain growth spurt; Behavior; Nonprotein amino acid; Excitotoxic; Cyanobacteria; Apoptosis; BMAA; environmental toxin; Algal blooming; Algblomning; algtoxin; alggift; hjärnutveckling; Toxicology; Toxikologi; Toxicology; Toxikologi;

   Abstract : Many cyanobacteria are reported to produce the nonprotein amino acid β-N-methylamino-L-alanine (BMAA). Cyanobacteria are extensively distributed in terrestrial and aquatic environments and recently BMAA was detected in temperate aquatic ecosystems, e.g. the Baltic Sea. READ MORE

6. 4. Diagnosis of Moisture in Transformer Insulation - Application of frequency domain spectroscopy

   Author : Chandima Ekanayake; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; moisture content; diagnostic methods; modelling; polarisation depolarisation currents PDC ; frequency domain spectroscopy FDS ; dielectric response measurements; Oil-impregnated pressboard paper insulation; Karl Fischer titration KFT ; conductivity; ageing;

   Abstract : This thesis presents application of dielectric response measurements for identifying condition of high voltage insulation in power transformers. Results of such measurements, incorporated with different modelling techniques, allow to estimate moisture content in solid part of transformer insulation. READ MORE

7. 5. Venturing Further into the Field of 2D Materials and their Laminated Parent Phases

   Author : Pernilla Helmer; Johanna Rosén; Jonas Björk; Martin Dahlqvist; Hannu-Pekka Komsa; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Density Functional Theory; Bonding analysis; Themodynamical stability; Electronic band structure; Computational screening; Dynamical stability; Nanolaminate; MXene; 2D material; Boridene; Chemical exfoliation; Selective etching;

   Abstract : The field of 2D materials is a relatively young and rapidly growing area within materials science, which is concerned with atomically thin states of matter. Because of their intrinsic 2D morphology, 2D materials have exceptionally high surface to weight or surface to volume ratio. READ MORE