Loading...
Search for:
traceability
0.151 seconds
Design of a Traceable Optimistic Fair Exchange Protocol
, M.Sc. Thesis Sharif University of Technology ; Salmasizadeh, Mahmoud (Supervisor)
Abstract
Fair exchange of digital items through computer network is an important research topic of modern cryptography. Generallty, a fair exchange protocol is a way which helps two parties to exchange their digital items fairly, so that at the end of the protocol execution, both parties recieve their desirable items or none of them recieves anything. In a practical applications, fair exchange protocol is widely used in different but related fields like contract signing protocols,non-repudiation protocols,e-ayment system and certified e-mails. In a fair exchange protocol, a trusted third party (TTP) acts as an arbitrator between two parties. To reduce the traffic load of the arbitrator, the concept...
Establishment, Characterization and Evaluation of a Reference Field in a MNSR Reactor for Calibration Neutron Dosimeters
, Ph.D. Dissertation Sharif University of Technology ; Hosseini, Abolfazl (Supervisor) ; Choopan Dastjerdi, Mohammad Hossein (Co-Supervisor) ; Mokhtari, Javad (Co-Supervisor)
Abstract
The purpose of this research is to establish a neutron reference field for the calibration of neutron dosimeters based on the beam of the neutron radiography system in the Isfahan miniature neutron source reactor (MNSR). The aim is to address the several limitations, including the inability to achieve a wide range of dosimetry, high uncertainty due to variations in distance from the source, significant scattering, and non-uniformity. To overcome these issues, a linear, stable, and wide-range dosimetry field based on MNSR have been established, characterized and evaluated by using the variations of the reactor power. In the first step of establishing the calibration field, the linear and...