627,338 research outputs found
Web Publishing of the Files Obtained by Flash
The aim of this article is to familiarize the user with the Web publishing of
the files obtained by Flash. The article contains an overview of Macromedia
Flash 5, as well as the running of a Playing Flash movie, information on Flash
and Generator, the publishing of Flash movies, a HTLM publishing for Flash
Player files and publishing by Generator templates.Comment: 10 pages, exposed on 5th International Conference "Actualities and
Perspectives on Hardware and Software" - APHS2009, Timisoara, Romani
Spatial contexts can inhibit a mislocalization of visual stimuli during smooth pursuit
The position of a flash presented during pursuit is mislocalized in the direction of the pursuit. Although this has been explained by a temporal mismatch between the slow visual processing of flash and fast efferent signals on eye positions, here we show that spatial contexts also play an important role in determining the flash position. We put various continuously lit objects (walls) between veridical and to-be-mislocalized positions of flash. Consequently, these walls significantly reduced the mislocalization of flash, preventing the flash from being mislocalized beyond the wall (Experiment 1). When the wall was shortened or had a hole in its center, the shape of the mislocalized flash was vertically shortened as if cutoff or funneled by the wall (Experiment 2). The wall also induced color interactions; a red wall made a green flash appear yellowish if it was in the path of mislocalization (Experiment 3). Finally, those flash–wall interactions could be induced even when the walls were presented after the disappearance of flash (Experiment 4). These results indicate that various features (position, shape, and color) of flash during pursuit are determined with an integration window that is spatially and temporally broad, providing a new insight for generating mechanisms of eye-movement mislocalizations
uFLIP: Understanding Flash IO Patterns
Does the advent of flash devices constitute a radical change for secondary
storage? How should database systems adapt to this new form of secondary
storage? Before we can answer these questions, we need to fully understand the
performance characteristics of flash devices. More specifically, we want to
establish what kind of IOs should be favored (or avoided) when designing
algorithms and architectures for flash-based systems. In this paper, we focus
on flash IO patterns, that capture relevant distribution of IOs in time and
space, and our goal is to quantify their performance. We define uFLIP, a
benchmark for measuring the response time of flash IO patterns. We also present
a benchmarking methodology which takes into account the particular
characteristics of flash devices. Finally, we present the results obtained by
measuring eleven flash devices, and derive a set of design hints that should
drive the development of flash-based systems on current devices.Comment: CIDR 200
Adobe Flash as a medium for online experimentation: a test of reaction time measurement capabilities
Adobe Flash can be used to run complex psychological experiments over the Web. We examined the reliability of using Flash to measure reaction times (RTs) using a simple binary-choice task implemented both in Flash and in a Linux-based system known to record RTs with millisecond accuracy. Twenty-four participants were tested in the laboratory using both implementations; they also completed the Flash version on computers of their own choice outside the lab. RTs from the trials run on Flash outside the lab were approximately 20 msec slower than those from trials run on Flash in the lab, which in turn were approximately 10 msec slower than RTs from the trials run on the Linux-based system (baseline condition). RT SDs were similar in all conditions, suggesting that although Flash may overestimate RTs slightly, it does not appear to add significant noise to the data recorded
On Coding Efficiency for Flash Memories
Recently, flash memories have become a competitive solution for mass storage.
The flash memories have rather different properties compared with the rotary
hard drives. That is, the writing of flash memories is constrained, and flash
memories can endure only limited numbers of erases. Therefore, the design goals
for the flash memory systems are quite different from these for other memory
systems. In this paper, we consider the problem of coding efficiency. We define
the "coding-efficiency" as the amount of information that one flash memory cell
can be used to record per cost. Because each flash memory cell can endure a
roughly fixed number of erases, the cost of data recording can be well-defined.
We define "payload" as the amount of information that one flash memory cell can
represent at a particular moment. By using information-theoretic arguments, we
prove a coding theorem for achievable coding rates. We prove an upper and lower
bound for coding efficiency. We show in this paper that there exists a
fundamental trade-off between "payload" and "coding efficiency". The results in
this paper may provide useful insights on the design of future flash memory
systems.Comment: accepted for publication in the Proceeding of the 35th IEEE Sarnoff
Symposium, Newark, New Jersey, May 21-22, 201
Geometry-based Detection of Flash Worms
While it takes traditional internet worms hours to infect all the vulnerable hosts on the Internet, a flash worm takes seconds. Because of the rapid rate with which flash worms spread, the existing worm defense mechanisms cannot respond fast enough to detect and stop the flash worm infections. In this project, we propose a geometric-based detection mechanism that can detect the spread of flash worms in a short period of time. We tested the mechanism on various simulated flash worm traffics consisting of more than 10,000 nodes. In addition to testing on flash worm traffics, we also tested the mechanism on non-flash worm traffics to see if our detection mechanism produces false alarms. In order to efficiently analyze bulks of various network traffics, we implemented an application that can be used to convert the network traffic data into graphical notations. Using the application, the analysis can be done graphically as it displays the large amount of network relationships as tree structures
Toward a Unified Performance and Power Consumption NAND Flash Memory Model of Embedded and Solid State Secondary Storage Systems
This paper presents a set of models dedicated to describe a flash storage
subsystem structure, functions, performance and power consumption behaviors.
These models cover a large range of today's NAND flash memory applications.
They are designed to be implemented in simulation tools allowing to estimate
and compare performance and power consumption of I/O requests on flash memory
based storage systems. Such tools can also help in designing and validating new
flash storage systems and management mechanisms. This work is integrated in a
global project aiming to build a framework simulating complex flash storage
hierarchies for performance and power consumption analysis. This tool will be
highly configurable and modular with various levels of usage complexity
according to the required aim: from a software user point of view for
simulating storage systems, to a developer point of view for designing, testing
and validating new flash storage management systems
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