Entries by 'Grace Lewis'

HTML5 for Mobile Software Applications at the Edge

Handheld Devices 4 Comments »

By Grace Lewis 
Principal Investigator, Edge-Enabled Tactical Systems
Software Solutions Division

Grace Lewis Many warfighters and first responders operate at what we call “the tactical edge,”  where users are constrained by limited communication connectivity, storage availability, processing power, and battery life.  In these environments, onboard sensors are used to capture data on behalf of mobile applications to perform tasks such as face recognition, speech recognition, natural language translation, and situational awareness. These applications then rely on network interfaces to send the data to nearby servers or the cloud if local processing resources are inadequate. While software developers have traditionally used native mobile technologies to develop these applications, the approach has some drawbacks, such as limited portability. In contrast, HTML5 has been touted for its portability across mobile device platforms, as well an ability to access functionality without having to download and install applications. This blog post describes research aimed at evaluating the feasibility of using HTML5 to develop applications that can meet tactical edge requirements. 

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Application Virtualization for Cloudlet-Based Cyber-Foraging at the Edge

Cloud Computing 2 Comments »

By Grace Lewis
Technical Lead, Edge-Enabled Tactical Systems Research
SEI Software Solutions Division

Grace LewisSoldiers and emergency workers who carry smartphones in the battlefield, or into  disaster recovery sites (such as Boston following the marathon bombing earlier this year) often encounter environments characterized by high mobility, rapidly-changing mission requirements, limited computing resources, high levels of stress, and limited network connectivity. At the SEI, we refer to these situations as “edge environments.” Along with my colleagues in the SEI’s Advanced Mobile Systems Initiative, my research aims to increase the computing power of mobile devices in edge environments where resources are scarce. One area of my work has focused on leveraging cloud computing so users can extend the capabilities of their mobile devices by offloading expensive computations to more powerful computing resources in a cloud. Some drawbacks to offloading computation to the cloud in resource-constrained environments remain, however, including latency (which can be exacerbated by the distance between mobile devices and clouds) and limited internet access (which makes traditional cloud computing unfeasible). This blog post is the latest in a series that describes research aimed at exploring the applicability of application virtualization as a strategy for cyber-foraging in resource-constrained environments.

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Architecting Service-Oriented Systems

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By Grace Lewis
Technical Lead
Edge-Enabled Tactical Systems Research

Grace Lewis In 2009, a popular blogger published a post entitled “SOA is Dead,” which generated extensive commentary among those who work in the field of service-oriented architecture (SOA). Many practitioners in this field completely misinterpreted the post; some read the title and just assumed that the content referenced the demise of SOA. Quite the opposite, the post was inviting people to stop thinking about SOA as a set of technologies and start embracing SOA as an approach for designing, developing, and managing distributed systems that goes beyond just the technology. Unfortunately, even though SOA is still alive and widely adopted, a belief still persists that SOA can be purchased off the shelf. This post highlights recent research aimed at clarifying this misperception for architects, as well as identifying the elements that constitute a service-oriented system and the relationships between these elements.

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Standards in Cloud Computing Interoperability

Cloud Computing No Comments »

By Grace Lewis
Technical Lead,
Edge-Enabled Tactical Systems Research

Grace Lewis In 2011, Col. Timothy Hill, director of the Futures Directorate within the Army Intelligence and Security Command, urged industry to take a more open-standards approach to cloud computing. “Interoperability between clouds, as well as the portability of files from one cloud to another, has been a sticking point in general adoption of cloud computing,” Hill said during a panel at the AFCEA International 2011 Joint Warfighting Conference. Hill’s view has been echoed by many in the cloud computing community, who believe that the absence of interoperability has become a barrier to adoption.  This posting reports on recent research exploring the role of standards in cloud computing and offers recommendations for future standardization efforts.

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Cloud Computing at the Tactical Edge

Cloud Computing 1 Comment »

By Grace Lewis,
Senior Member of the Technical Staff
Research Technology & System Solutions

Grace Lewis Cloudlets, which are lightweight servers running one or more virtual machines (VMs), allow soldiers in the field to offload resource-consumptive and battery-draining computations from their handheld devices to nearby cloudlets. This architecture decreases latency by using a single-hop network and potentially lowers battery consumption by using WiFi instead of broadband wireless. This posting extends our original post by describing how we are using cloudlets to help soldiers perform various mission capabilities more effectively, including facial, speech, and imaging recognition, as well as decision making and mission planning.

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