4 research outputs found

    Improving Energy Effeciency and Reliability of Disk Storage Systems

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    Numerous energy saving techniques have been developed to aggressively reduce energy dissipation in parallel disks. However, many existing energy conservation schemes have substantial adverse impacts on disk reliability. To remedy this deficiency, in this paper we address the problem of making tradeoffs between energy efficiency and reliability in parallel disk systems. Among several factors affecting disk reliability, the two most important factors - disk utilization and ages - are the focus of this study. We built a mathematical reliability model to quantify the impacts of disk age and utilization on failure probabilities of mirrored disk systems. In light of the reliability model, we proposed a novel concept of safe utilization zone, within which energy dissipation in disks can be reduced without degrading reliability. We developed two approaches to improving both reliability and energy efficiency of disk systems through disk mirroring and utilization control, enforcing disk drives to be operated in safe utilization zones. Our utilization-based control schemes seamlessly integrate reliability with energy saving techniques in the context of fault-tolerant systems. Experimental results show that our approaches can significantly improve reliable while achieving high-energy efficiency for disk systems under a wide range of workload situations

    Reversing the Tide in Science, Engineering, Technology and Mathematics (Stem): Academically Gifted African American Students in Historically Black Colleges & Universities

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    What started off as a national concern has escalated to the point of crisis (Bonner, Alfred, Lewis, Nave & Frizell, 2009; Chubin & Malcolm, 2008; Hrabowski, Summers & Hrabowski, 2006). The current state of affairs regarding African American participation in STEM disciplines has become one of the thorniest issues of contemporary focus. This article highlights data collected for a NSF Education Research grant. The focus of this HBCU-UP project was to uncover factors contributing to the success of academically gifted (high-achieving) African American students enrolled in engineering programs at the 12 ABET accredited four-year institutions in the U.S. Specifically, this research highlights qualitative case study data including key categories and themes identified as impacting the academic success of this high-achieving cohort across each of the 12 institutions included in this study. Based on the findings of this study, recommendations are provided to increase the success of African American gifted students in STEM fields at HBCUs

    Increasing the Retention of Females of Color in Engineering and Technology Degree Programs through Professional Development Activities

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    This paper provides an overview of professional development activities designed to provide minority female engineering students with the knowledge and essential skills to enhance their preparedness to transition into the engineering workforce and their ability to sustain a successful career. Three professional development workshops are discussed that focused on such topics as breaking the glass ceiling, leadership, soft skills development, balancing technical and non-technical skill development, professional etiquette, mentoring, and creating a growth plan. Industry partnerships have been a critical component to the success of these activities
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