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We present a compiler algorithm called Bit Value, which can discover both unused and constant bits in dusty-deck C programs. Bit-Value uses forward and backward dataflow analyses, generalizing constant-folding and dead-code detection at the bit-level. This algorithm enables compiler optimizations which target special processor architectures for computing on non-standard bitwidths. Using this...
In this paper, we delineate the causes of performance variations when scaling provisioned virtual resources for a variety of MapReduce applications. Hadoop MapReduce facilitates the development and execution processes of large-scale batch applications on big data. However, provisioning suitable resources to achieve desired performance at an affordable cost requires expertise into the execution model...
Understanding performance scalability in MapReduce applications presents a challenging problem. The difficulty lies in the distributed locations of input data and the distributed compute resources that utilize varied network substrates. User-defined Map and Reduce stages, with numerous application parameters, further complicate the problem. Using small datasets and limited test runs to understand...
Predicting execution behavior of MapReduce applications when scaling the input dataset presents a challenging problem. The difficulty lies in the distributed locations of input data and the distributed, virtualized compute resources that utilize different network substrates. The potential payoff lies in using small datasets and limited test runs to understand how applications will behave with "big...
Achieving homophily, or association based on similarity, between a human user and a robot holds a promise of improved perception and task performance. However, no previous studies that address homophily via ethnic similarity with robots exist. In this paper, we discuss the difficulties of evoking ethnic cues in a robot, as opposed to a virtual agent, and an approach to overcome those difficulties...
HRI studies in a Middle Eastern environment are subject to nuances and subtleties. This study explores the nature of interactions, in an uncontrolled environment, between a permanently deployed bi-lingual robot-receptionist and interlocutors of varied native tongues. We correlate an interlocutor's native language with their propensity for accepting an invite and the duration of the ensuing conversation...
Hala is a bilingual (Arabic and English) culturally-sensitive robot receptionist located at Carnegie Mellon University in Qatar. We report results from Hala's deployment by comparing her English dialogue corpus to that of a similar monolingual robot (named ??Tank??) located at CMU's Pittsburgh campus. Specifically, we compare the average number of turns per interaction, duration of interactions, frequency...
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