Hewlett-Packard

About: Hewlett-Packard is a company organization based out in Palo Alto, California, United States. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 34663 authors who have published 59808 publications receiving 1467218 citations. The organization is also known as: Hewlett Packard & Hewlett-Packard Company.

What's inside the Cloud? An architectural map of the Cloud landscape

Abstract: We propose an integrated Cloud computing stack architecture to serve as a reference point for future mash-ups and comparative studies. We also show how the existing Cloud landscape maps into this architecture and identify an infrastructure gap that we plan to address in future work.

Molecular wire crossbar memory

Abstract: A molecular wire crossbar memory (MWCM) system is provided. The MWCM comprises a two-dimensional array of a plurality of nanometer-scale devices, each device comprising a junction formed by a pair of crossed wires where one wire crosses another and at least one connector species connecting the pair of crossed wires in the junction. The connector species comprises a bi-stable molecular switch. The junction forms either a resistor or a diode or an asymmetric non-linear resistor. The junction has a state that is capable of being altered by application of a first voltage and sensed by application of a second, non-destructive voltage.

The HP AutoRAID hierarchical storage system

Abstract: Configuring redundant disk arrays is a black art To configure an array properly, a system administrator must understand the details of both the array and the workload it will support Incorrect understanding of either, or changes in the workload over time, can lead to poor performance We present a solution to this problem: a two-level storage hierarchy implemented inside a single disk-array controller In the upper level of this hierarchy, two copies of active data are stored to provide full redundancy and excellent performance In the lower level, RAID 5 parity protection is used to provide excellent storage cost for inactive data, at somewhat lower performance The technology we describe in this article, know as HP AutoRAID, automatically and transparently manages migration of data blocks between these two levels as access patterns change The result is a fully redundant storage system that is extremely easy to use, is suitable for a wide variety of workloads, is largely insensitive to dynamic workload changes, and performs much better than disk arrays with comparable numbers of spindles and much larger amounts of front-end RAM cache Because the implementation of the HP AutoRAID technology is almost entirely in software, the additional hardware cost for these benefits is very small We describe the HP AutoRAID technology in detail, provide performance data for an embodiment of it in a storage array, and summarize the results of simulation studies used to choose algorithms implemented in the array

Efficient RDF storage and retrieval in Jena2

Abstract: RDF and related Semantic Web technologies have been the recent focus of much research activity. This work has led to new specifications for RDF and OWL. However, efficient implementations of these standards are needed to realize the vision of a world-wide semantic Web. In particular, implementations that scale to large, enterprise-class data sets are required. Jena2 is the second generation of Jena, a leading semantic web programmers' toolkit. This paper describes the persistence subsystem of Jena2 which is intended to support large datasets. This paper describes its features, the changes from Jena1, relevant details of the implementation and performance tuning issues. Query optimization for RDF is identified as a promising area for future research.

Media content protection utilizing public key cryptography

Abstract: A system and method for providing protection of content stored on a bulk storage media is disclosed. The technique for providing protection from unauthorized utilization of the content so stored is provided publicly in order to allow for those utilizing a conforming media device to master or generate content protected according to the present invention. Various ways in which to protect content are disclosed including verification of the authenticity of a particular media, utilization of an accepted list of media play-back devices and their corresponding published public keys in order to securely pass media content keys thereto, and utilization of an external contact to provide media content keys and/or updates of accepted media play-back devices.