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We present the design, implementation, and evaluation of Direct File System (DFS) for virtualized flash storage. Instead of using traditional layers of abstraction, our layers of abstraction are designed for directly accessing flash memory devices. DFS has two main novel features. First, it lays out its files directly in a very large virtual storage address(More)
Advances in video compression technology have been driven by ever-increasing processing power available in software and hardware. The emerging High Efficiency Video Coding (HEVC) standard aims to provide a doubling in coding efficiency with respect to the H.264/AVC high profile, delivering the same video quality at half the bit rate. In this paper,(More)
Over the last twenty years the interfaces for accessing persistent storage within a computer system have remained essentially unchanged. Simply put, seek, read and write have defined the fundamental operations that can be performed against storage devices. These three interfaces have endured because the devices within storage subsystems have not(More)
Low power has developed as an important subject in today's and Kaijian Shi, “Low Power Methodology Manual for System on Chip Design”. Embedded Systems 1 (Politecnico di Milano AA 2014/2015) Kaijian Shi, "Low Power Methodology Manual: For System-on-Chip Design", Springer 2008. approach capturing lowpower design characteristics in earlier design stages. (1)(More)
One of today's most successful embedded devices, the mobile phone, embodies a set of challenging design requirements: long battery life, small size, high performance and low cost. The single parameter that complicates the simultaneous fulfilment of all of these design goals is energy efficiency of the system, since batteries only hold a finite amount of(More)
Nuclear factor (NF)-kappaB is a major survival pathway engaged by the Human T-Lymphotropic Virus type 1 (HTLV-1) Tax protein. Tax1 activation of NF-kappaB occurs predominantly in the cytoplasm, where Tax1 binds NF-kappaB Essential Modulator (NEMO/IKKgamma) and triggers the activation of IkappaB kinases. Several independent studies have shown that(More)
BACKGROUND Injection drug users and female sex workers are two of the populations most at risk for becoming infected with HIV in countries with concentrated epidemics. Many of the adults who fall into these categories are also parents, but little is known about the vulnerabilities faced by their children, their children's sources of resilience, or(More)
The Smart Grid (SG) is conceived as the evolution of the current electrical grid representing a big leap in terms of efficiency, reliability and flexibility compared to today's electrical network. To achieve this goal, the Wireless Sensor Networks (WSNs) are considered by the scientific/engineering community to be one of the most suitable technologies to(More)