Precision Agriculture systems allow farmers to have a deeper, more detailed knowledge about the a... more Precision Agriculture systems allow farmers to have a deeper, more detailed knowledge about the agricultural field, and helps them make better management decisions. However, the existing solutions rely upon significant investment in new equipment and changes in field layouts making it impractical to farms with less mechanized methods. In this paper we propose an Agricultural Workforce Monitoring system to enrich data on production models. Our approach uses a conventional smartphone embedded with sensors to monitor workers’ locations and movements that allow for activity inference. The solution uses GPS and Dead Reckoning to capture worker’s locations in the agricultural field, and Machine Learning to classify the agricultural worker activities throughout their working day. The developed system was implemented and evaluated in actual olive fields.
Building multi-services in personal mobile devices based on partially trusted domains
ist.utl.pt
Services based on personal devices are usually supported by self-contained infrastructures with s... more Services based on personal devices are usually supported by self-contained infrastructures with specific terminals, managed by a supervising organization that ensures a trust domain with overall consistency. Well-known examples are automated banking, mobile ...
We describe the rationale for the design and the architecture of a Memory Management Unit (MMU) f... more We describe the rationale for the design and the architecture of a Memory Management Unit (MMU) for object-oriented systems. The CAMOES 1 MMU supports arbitrary size protected objects mapped on a single virtual address space. Support for object invocations is provided in the form of an operations cache closely coupled with the addressing hardware. The MMU only executes in hardware those functions crucial for performance; other functions and, namely, the management of internal buffers and associative memories, and object management policies, are handled in software. This functional organisation is suitable for current generation processors based on RISC principles and is able to support open multi-lingual environments.
Precision Agriculture systems allow farmers to have a deeper, more detailed knowledge about the a... more Precision Agriculture systems allow farmers to have a deeper, more detailed knowledge about the agricultural field, and helps them make better management decisions. However, the existing solutions rely upon significant investment in new equipment and changes in field layouts making it impractical to farms with less mechanized methods. In this paper we propose an Agricultural Workforce Monitoring system to enrich data on production models. Our approach uses a conventional smartphone embedded with sensors to monitor workers’ locations and movements that allow for activity inference. The solution uses GPS and Dead Reckoning to capture worker’s locations in the agricultural field, and Machine Learning to classify the agricultural worker activities throughout their working day. The developed system was implemented and evaluated in actual olive fields.
Building multi-services in personal mobile devices based on partially trusted domains
ist.utl.pt
Services based on personal devices are usually supported by self-contained infrastructures with s... more Services based on personal devices are usually supported by self-contained infrastructures with specific terminals, managed by a supervising organization that ensures a trust domain with overall consistency. Well-known examples are automated banking, mobile ...
We describe the rationale for the design and the architecture of a Memory Management Unit (MMU) f... more We describe the rationale for the design and the architecture of a Memory Management Unit (MMU) for object-oriented systems. The CAMOES 1 MMU supports arbitrary size protected objects mapped on a single virtual address space. Support for object invocations is provided in the form of an operations cache closely coupled with the addressing hardware. The MMU only executes in hardware those functions crucial for performance; other functions and, namely, the management of internal buffers and associative memories, and object management policies, are handled in software. This functional organisation is suitable for current generation processors based on RISC principles and is able to support open multi-lingual environments.
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Papers by Alberto Cunha