431,702 research outputs found

    Wireless Sensors for Health Monitoring of Marine Structures and Machinery

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    Remote structural and machinery health monitoring (SMHM) of marine structures such as ships, oil and gas rigs, freight container terminals, and marine energy platforms can ensure their reliability. However, the wired sensors currently used in these applications are difficult and expensive to install and maintain. Wireless Sensor Networks (WSN) can potentially replace them but there are significant capability gaps that currently prevent their long-term deployment in the harsh marine environment and the structurally-complex, compartmentalised, all-metal scenarios with high volume occupancy of piping, ducting and operational machinery represented by marine structures. These gaps are in sensing, processing and communication hardware and firmware capabilities, reduction of power consumption, hardware assembly and packaging for reliability in the marine environment, reliability of wireless connectivity in the complex metal structures, and software for WSN deployment planning in the marine environment. Taken together, these gaps highlight the need for a systems integration methodology for marine SMHM and this is the focus of the research presented in this thesis. The research takes an applied approach by first designing the hardware and firmware for two wireless sensing modules specifically for marine SMHM, one a novel eddy-current-based 3D module for measuring multi-axis metal structural displacement, the second a fully integrated module for monitoring of structure and machinery reliability. The research then addresses module assembly and packaging methods to ensure reliability in the marine environment, the development of an efficient methodology for characterising the reliability of wireless connectivity in complex metal structures, and development of user interface software for planning WSN deployment and for managing the collection of WSN data. These are then individually and collectively characterised and tested for performance and reliability in laboratory, land-based and marine deployments. In addition to the research outcomes in each of these individual aspects, the overall research outcome represents a systems integration methodology that now allows deployment, with a high expectation of reliability of marine SMHM WSNs

    An evaluation criterion for open source software projects: enhancement process effectiveness

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    Enhancement process is a key process in which open source software (OSS) project responds to user needs in terms of suggesting and implementing software features, thus the dimension of enhancement effectiveness corresponds nicely to adopters' concern about open source software. This study aims to construct a valid, reliable measurement model for the enhancement process effectiveness in an open source environment. We examine the validity and reliability of an initial list of indicators through two rounds of data collection and analysis from 240 and 750 OSS projects respectively, and come up with a measurement model for the effectiveness of enhancement process comprising four indicators. The implication of this measurement model for practitioners is explained through a numerical example followed by implications for research community.Griffith Sciences, School of Information and Communication TechnologyFull Tex

    An investigation of the relationship between Service Quality and Customer Satisfaction in Melaka Bookstore

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    Customer satisfaction is a significant factor in influencing the service sector’s revenue. In this competitive environment which full of advance technologies, delivering a high quality of service is a factor for a stable competitive advantage. Customer satisfaction has a beneficial impact on the profitability of an organization. Service quality will reflect the customer's satisfaction in dimension of tangibles, reliability, assurances, empathy and responsiveness. Although there are many researches about SERVQUAL Model, but there are not much academic evidence measuring customer satisfaction in the bookstore services. Therefore, this research attempts to describe the relationship of service quality and customer satisfaction in the business-to-consumer (B2C). Business to Consumer or B2C is used by businesses that intend to market the products or services to consumers. B2C will conduct directly that business with customers without middleman. Data collection covers 15 bookstores in Melaka state. This research will focusing on selected bookstores such as Popular bookstore, MPH bookstore, TS Commerce bookstore, Kedai Buku Pintar Sdn Bhd and other bookstores that situated in the area of Melaka Tengah. The 151 survey questionnaires received and analyzed using SPSS software. Based on the regression analysis, onlytwo variables from five variables are significant. The two significant variables are reliability and empathy but have positive relationship with customer satisfaction

    The effectiveness of digital storytelling in the classrooms: a comprehensive study

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    In recent years the use of new technologies in educational systems has increased worldwide as digital cameras, personal computers, scanners, and easy-to-use software have become available to educators to harness the digital world. The impact of new technologies in educational contexts has been mostly positive as new technologies have given educators the opportunity to enhance their knowledge, skills, and therefore enhance the standard of education. Researchers have found that student engagement, achievement and motivation are enhanced through integration of such technologies. However, education systems still face many challenges: one of these challenges is how to enhance student engagement to provide better educational outcomes. It has become increasingly important to use innovative pedagogical models to engage learners. Digital storytelling is one of the innovative pedagogical approaches that can engage students in deep and meaningful learning. This research project aimed to create a constructivist learning environment with digital storytelling. The research investigated the pedagogical aspects of digital storytelling and the impact of digital storytelling on student learning when teachers and students use digital stories. A multi-site case study was conducted in one Australian school at primary and secondary levels. In selected classrooms, students and teachers had the opportunity to engage in innovative learning experiences based on digital storytelling. In order to enhance the reliability and validity of the research, multiple methods of data collection and analysis were used. Data was collected with qualitative and quantitative methods. An evaluation rubric was used to collect quantitative data, while interviews and observation were used to collect qualitative data. Data collection was guided by a mixed methods research design in order to evaluate if and how digital storytelling enhances teaching and learning outcomes. The findings from this study suggest that digital storytelling is a powerful tool to integrate instructional messages with learning activities to create more engaging and exciting learning environments. It is a meaningful approach for creating a constructivist learning environment based on novel principles of teaching and learning. Thus, this approach has the potential to enhance student engagement and provide better educational outcomes for learners

    Measuring the software process and product: Lessons learned in the SEL

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    The software development process and product can and should be measured. The software measurement process at the Software Engineering Laboratory (SEL) has taught a major lesson: develop a goal-driven paradigm (also characterized as a goal/question/metric paradigm) for data collection. Project analysis under this paradigm leads to a design for evaluating and improving the methodology of software development and maintenance
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