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Träfflista för sökning "WFRF:(Rauf Muhammad) srt2:(2020)"

Sökning: WFRF:(Rauf Muhammad) > (2020)

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1.
  • Abbas, Muhammad, et al. (författare)
  • Keywords-based test categorization for Extra-Functional Properties
  • 2020
  • Ingår i: 2020 IEEE International Conference on Software Testing, Verification and Validation Workshops (ICSTW). - : IEEE. - 9781728110752 ; , s. 153-156
  • Konferensbidrag (refereegranskat)abstract
    • Categorizing existing test specifications can provide insights on coverage of the test suite to extra-functional properties. Manual approaches for test categorization can be time-consuming and prone to error. In this short paper, we propose a semi-automated approach for semantic keywords-based textual test categorization for extra-functional properties. The approach is the first step towards coverage-based test case selection based on extra-functional properties. We report a preliminary evaluation of industrial data for test categorization for safety aspects. Results show that keyword-based approaches can be used to categorize tests for extra-functional properties and can be improved by considering contextual information of keywords.
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2.
  • Yousaf, M., et al. (författare)
  • Evaluation of rare earth (Yb, La) doped (Sm3Fe5O12) garnet ferrite membrane for LT-SOFC
  • 2020
  • Ingår i: International journal of hydrogen energy. - : Elsevier Ltd. - 0360-3199 .- 1879-3487.
  • Tidskriftsartikel (refereegranskat)abstract
    • Rare earth element doping is a popular methodology for improving the electrical and electrochemical properties of materials. Inspired by this ideology, garnet ferrite material Sm3Fe5O12 (SFO) doped by rare earth (Yb, La) metal ions to form Sm3-0.5Yb0.5Fe5O12 (SYFO) and Sm3-0.5La0·5Fe5O12 (SLFO). The samples are synthesized by sol gel auto combustion and have been applied as electrolyte membrane for the first time in low temperature solid oxide fuel cell (LT-SOFC). The results indicate that the as-prepared materials have triple charge transport (H+/O−2/e−) carrier which promotes the hydrogen oxidation reaction (HOR) and oxygen reduction reactions (ORR) in SOFC at triple phase boundary region (TPB). Electrochemical impedance spectroscopy (EIS) reveals that the polarization resistance of SLFO membrane significantly reduces from 0.92 Ω-cm2 to 0.45 Ω-cm2 and the power output improve from 310 mW/cm2 to 650 mW/cm2 at 550 °C temperature in comparison with that of SYFO and SFO electrolyte supported cells. UV-vis diffused spectroscopy explains the semiconducting nature of the prepared materials due to the existence of optical bandgap in the semiconductor region. The further investigation also verifies the protonic conduction of SLFO membrane by constructing oxygen ion blocking fuel cell with configuration of Ni-NCAL/BZCY/SLFO/BZCY/Ni-NCAL having 427.94 mW/Cm2 fuel cell performance with 1.03 OCV at 550 °C temperature. 
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  • Resultat 1-2 av 2

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