P2r – A Pairwise Testing Strategy Supporting Execution Resumption

Achieving an accepted level of software product quality assurance requires exhaustive and time consuming testing process, especially when testing software with large number of parameters and large number of possible input values for its parameters. Pairwise software testing have been commonly employed since it proved its usefulness to sample lists of test cases for such software while achieving an accepted level of code line and function coverage. However this process might require hours even days, since reducing the size of the produced list require time consuming computations. In case interruption occurred while generating test suite (e.g. due to power failure, hardware or software malfunctions), the process must be restarted from the beginning, much time and effort will be wasted if process have been interrupted when it’s near completion. In order to address the aforementioned issue, a number checkpointing schemes have been studied to refer the most suitable scheme to match pairwise test suite strategy. The project focuses on the development of a new pairwise strategy P2R, which can generate sufficiently competitive pairwise test suites in terms of test suite size and execution time. In order to achieve this target, P2R employed a new checkpointing scheme that is based on an amalgam of periodic and dynamic checkpointing schemes. Experiments have proven that P2R provides the ability to resume existing test while generating competitive results

Copper selenide film electrodes prepared by combined electrochemical/chemical bath depositions with high photo-electrochemical conversion efficiency and stability

Copper selenide (of the type Cu2-xSe) film electrodes, prepared by combined electrochemical (ECD) followed by chemical bath deposition (CBD), may yield high photo-electrochemical (PEC) conversion efficiency (~14.6%) with no further treatment. The new ECD/CBD-copper selenide film electrodes show enhanced PEC characteristics and exhibit high stability under PEC conditions, compared to the ECD or the CBD films deposited separately. The electrodes combine the advantages of both ECD-copper selenide electrodes (in terms of good adherence to FTO surface and high surface uniformity) and CBD-copper selenide electrodes (suitable film thickness). Effect of annealing temperature, on the ECD/CBD film electrode composition and efficiency, is discussed.The results of this work are partly based on K. Murtada M.Sc. Thesis, under direct supervision of H.S. Hilal. Other experimental measurements and calculations, including dark current experiments, film thickness measurement, electrical conductivity, SEM analysis, XRD &AFM analysis revisions were performed by A. Zyoud after the thesis completion. Additional film electrode stability experiments under PEC conditions, were also performed by A. Zyoud after the Thesis completion. SEM micrographs and EDX spectra were measured by T.W. Kim and H-J.C. at the KIER, Korea. The XRD patterns were measured by D-H. Park and H. Kwon at PUK. M.H.S. Helal and H. Bsharat contributed with literature search, discussions and modeling. M. Faroun measured AFM micrographs at Al-Quds University. H.S. Hilal acknowledges financial support from ANU, Islamic Development Bank, Al-Maqdisi Project and Union of Arab Universities. T.W. Kim and H-J. Choi acknowledge financial support from the framework of the Research and Development Program of the Korea Institute of Energy Research (B6-2523)

P2R - A Pairwise Testing Strategy Supporting Execution Resumption

Pairwise strategies have been proven to be useful to systematically sample test data for interaction testing consideration. However, generating pairwise test suite can be a painstakingly difficult endeavor especially involving large configurations. Here, the generation process can take hours and even days to complete owing to the need to sample from large numbers of input parameters and values. In the case of interruption (e.g. due to power failure or hardware malfunctions), there is often a need to restart the whole generation process again from the beginning. If the pairwise test suite is significantly large and the overall progress is near completion, restarting means a lot of wasted efforts.In order to address the aforementioned issues, we have developed a new pairwise strategy, called P2R, which can generate sufficiently competitive pairwise test suite. Unlike existing pairwise strategies, P2R also has the capability to seamlessly resume existing test generationprocess upon interruption

Enhanced PEC characteristics of pre-annealed CuS film electrodes by metalloporphyrin/polymer matrices

High conversion efficiency (η) values have been obtained from modified CuS film electrodes electrochemically deposited onto Glass/FTO. The modification involved pre-annealing the film followed by coating with tetra(-4-pyridyl)porphyrinato manganese (MnTPyP+) ions embedded inside a polyethylene (PE) matrix. The Glass/FTO/CuS/MnTPyP/PE electrodes exhibited enhanced photo-electrochemical (PEC) characteristics under solar simulated illumination (5.6 mW/cm−2) in aqueous media, compared to the as-prepared Glass/FTO/CuS films which showed no PEC activity. Up to 17.4% efficiency and 85% fill factor (FF) values were obtained from the modified film electrodes. Such characteristics have not been widely known for metal chalcogenide based film electrodes before. Different pre-annealing temperatures were attempted and the 250 °C temperature, followed by quenching, showed favorable results. Different aqueous redox couples were studied and the environmentally safe FeCl2/FeCl3 aqueous system showed highest PEC characteristics. Effect of pre-annealing on film electrode characteristics is discussed. The MnTPyP/PE matrix behaves as charge transfer catalyst for the holes across the CuS film/liquid junction

Aspects of urinary tract infections and antimicrobial resistance in hospitalized urology patients in Asia: 10-Year results of the Global Prevalence Study of Infections in Urology (GPIU)

10.1016/j.jiac.2017.11.013Journal of Infection and Chemotherapy244278-283JICH