Sökning: "watchdog"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet watchdog.

1. 1. Hardware and Software Mechanisms for Control Flow Checking

   Författare :Ghassem Miremadi; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fault tolerance; error detection latency; signature monitoring; watchdog processor; dependability evaluation; transient faults; physical fault injection; concurrent error detection; control flow checking; error detection coverage;

   Sammanfattning : The improvement of dependability in computing systems requires the evaluation of fault tolerance mechanisms such as error detection, error recovery and reconfiguration. Central to this thesis is an experimental evaluation of several hardware and/or software implemented mechanisms for the concurrent detection of control flow errors. LÄS MER

3. 2. Journalism Worthy of the Name: A Human Rights Perspective on Freedom within the Press

   Författare :Herdis Thorgeirsdottir; Juridiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; positive requirements; dignity; democracy; Public Watchdog; European Convention on Human Rights; Article 10; journalism; freedom within the press;

   Sammanfattning : There is much tension between the conception of the press as a private enterprise subject to the logic of the market and the press as an instrument of democracy. One of the broken promises of democracy is the failure of the market in guaranteeing a vigorous political debate. LÄS MER

4. 3. On Concurrent Error Detection and Error Propagation

   Författare :Joakim Ohlsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; error models; control flow monitoring; simulation experiments; concurrent error detection; permanent faults; watchdog processors; fault injection; transient faults;

   Sammanfattning : This thesis addresses three important steps in the selection of error detection mechanisms for microprocessors: (i) the design and evaluation of error detection mechanisms, (ii) the study of microprocessor error behavior and propagation and (iii) the design and use of error models. The first part of the thesis evaluates four error detection methods with respect to para- meters such as error detection coverage and performance loss, while the second and third parts focus on determining the error patterns most likely to occur in a computer system when different types of faults are present and how to incorporate those error patterns into error models. LÄS MER

5. 4. Design and evaluation techniques for detection and coverage estimation of low-level errors

   Författare :Örjan Askerdal; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; simulation-based fault injection; error detection techniques; double execution; watchdog timers; fault tolerance; COTS; self-tests; embedded systems; assertion checks;

   Sammanfattning : .... LÄS MER

7. 5. Physical fault injection for validation of dependable computing systems and a fault-tolerant computer design for safety critical missions

   Författare :Ulf Gunneflo; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; single event upsets; watchdog processors; Fault injection; transient faults; dependability validation; power supply disturbances;

   Sammanfattning : .... LÄS MER