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.

Molecular-wire crossbar interconnect (MWCI) for signal routing and communications

Abstract: A molecular-wire crossbar interconnect for signal routing and communications between a first level and a second level in a molecular-wire crossbar is provided The molecular wire crossbar comprises a two-dimensional array of a plurality of nanometer-scale switches Each switch is reconfigurable and self-assembling and comprises a pair of crossed wires which form a junction 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 molecule Each level comprises at least one group of switches and each group of switches comprises at least one switch, with each group in the first level connected to all other groups in the second level in an all-to-all configuration to provide a scalable, defect-tolerant, fat-tree networking scheme The primary advantage is ease of fabrication, because an active switch is formed any time two wires cross This saves tremendously on circuit area (a factor of a few times ten), since no other wires or ancillary devices are needed to operate the switch or store the required configuration This reduction of the area of a configuration bit and its switch to just the area of two crossing wires is a major advantage in constructing a defect-tolerant interconnect network

System and method of graphically displaying data for an intrusion protection system

Abstract: In an embodiment of the present invention, a method of displaying data related to an intrusion event on a computer system comprising the steps of capturing data related to the intrusion event, decoding the captured data from a predetermined format to a predetermined format decipherable by humans, the decoded data comprising data components intrusion signature, data summary, and detailed data, correlating data components of the intrusion signature, data summary and detailed data to one another. The method further comprises the steps of retrieving an web browser-based template, and graphically displaying the correlated decoded data components using the web browser-based template.

SAIL: single access point-based indoor localization

Abstract: This paper presents SAIL, a Single Access Point Based Indoor Localization system. Although there have been advances in WiFi-based positioning techniques, we find that existing solutions either require a dense deployment of access points (APs), manual fingerprinting, energy hungry WiFi scanning, or sophisticated AP hardware. We design SAIL using a single commodity WiFi AP to avoid these restrictions. SAIL computes the distance between the client and an AP using the propagation delay of the signal traversing between the two, combines the distance with smartphone dead-reckoning techniques, and employs geometric methods to ultimately yield the client's location using a single AP. SAIL combines physical layer (PHY) information and human motion to compute the propagation delay of the direct path by itself, eliminating the adverse effect of multipath and yielding sub-meter distance estimation accuracy. Furthermore, SAIL systematically addresses some of the common challenges towards dead-reckoning using smartphone sensors and achieves 2-5x accuracy improvements over existing techniques. We have implemented SAIL on commodity wireless APs and smartphones. Evaluation in a large-scale enterprise environment with 10 mobile users demonstrates that SAIL can capture the user's location with a mean error of 2.3m using just a single AP.

General Green’s-function formalism for transport calculations with spd Hamiltonians and giant magnetoresistance in Co- and Ni-based magnetic multilayers

Abstract: A general Green’s-function technique for elastic spin-dependent transport calculations is presented, which ~i! scales linearly with system size and ~ii! allows straightforward application to general tight-binding Hamiltonians ( spd in the present work!. The method is applied to studies of conductance and giant magnetoresistance ~GMR! of magnetic multilayers in current perpendicular to planes geometry in the limit of large coherence length. The magnetic materials considered are Co and Ni, with various nonmagnetic materials from the 3d ,4 d , and 5d transition metal series. Realistic tight-binding models for them have been constructed with the use of density functional calculations. We have identified three qualitatively different cases which depend on whether or not the bands ~densities of states! of a nonmagnetic metal ~i! form an almost perfect match with one of spin subbands of the magnetic metal ~as in Cu/Co spin valves!, ~ii! have almost pure sp character at the Fermi level ~e.g., Ag!, and ~iii! have almost pure d character at the Fermi energy ~e.g., Pd, Pt!. The key parameters which give rise to a large GMR ratio turn out to be ~i! a strong spin polarization of the magnetic metal, ~ii! a large energy offset between the conduction band of the nonmagnetic metal and one of spin subbands of the magnetic metal, and ~iii! strong interband scattering in one of spin subbands of a magnetic metal. The present results show that GMR oscillates with variation of the thickness of either nonmagnetic or magnetic layers, as observed experimentally. @S0163-1829~99!03118-5#

Integrated nucleic acid analysis system for MALDI-TOF MS

Abstract: An integrated nucleic acid sample analysis system for matrix-assisted laser-desorption/ionization time-of-flight mass spectroscopy (MALDI-TOF MS) is described. The integrated system comprises a miniaturized sample preparation compartment interfaced directly with a MALDI-TOF ionization surface for amplifying and/or otherwise chemically manipulating an oligonucleotide analyte and presenting the analyte to a MALDI ionization surface for mass spectrometry analysis. The miniaturized integrated sample handling system disclosed herein finds application in the amplification and analysis of DNA samples for genetic diagnosis and other uses.