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 & Substrate (printing). The organization has 34663 authors who have published 59808 publications receiving 1467218 citations. The organization is also known as: Hewlett Packard & Hewlett-Packard Company.

Method for more efficiently installing software components from a remote server source

Abstract: This invention includes a method for more efficiently installing a subset of software components and data files contained in a component pool in a distributed processing network such as the Internet. An installation package delivered to a requesting end user is custom configured at a remote server location prior to delivery to a client system operated by the user, in response to the user's inputs. The delivered installation package contains only the programs, data, and local installation tools required for the user's unique installation requirements. The user initiates the installation process by connecting to the remote server system via a telecommunications link within a distributed processing network, such as the Internet. Engaging in a dialog with the server which provides informational links to server-side databases, the user chooses all software components and options that he desires his software package to have. Such a package may be, for example, a subset of a software suite. After selection of all options, a single package is manufactured on the server. A single download then occurs of a single file. This is no bigger or smaller than what is absolutely required by the components and options selected. Upon receipt of the downloaded file, the user executes the file to unpack the installation directory. An auto-start feature can also be included which immediately launches the installation of the selected applications and options.

Identity-based key agreement protocols from pairings

Abstract: In recent years, a large number of identity- based key agreement protocols from pairings have been proposed. Some of them are elegant and practical. However, the security of this type of protocol has been surprisingly hard to prove, even in the random oracle model. The main issue is that a simulator is not able to deal with reveal queries, because it requires solving either a computational problem or a decisional problem, both of which are generally believed to be hard (i.e., computationally infeasible). The best solution so far for security proofs uses the gap assumption, which means assuming that the existence of a decisional oracle does not change the hardness of the corresponding computational problem. The disadvantage of using this solution to prove security is that such decisional oracles, on which the security proof relies, cannot be performed by any polynomial time algorithm in the real world, because of the hardness of the decisional problem. In this paper we present a method incorporating a built-in decisional function into the protocols. The function transfers a hard decisional problem in the proof to an easy decisional problem. We then discuss the resulting efficiency of the schemes and the relevant security reductions, in the random oracle model, in the context of different pairings one can use. We pay particular attention, unlike most other papers in the area, to the issues which arise when using asymmetric pairings.

Integrating user-perceived quality into Web server design

Abstract: As the number of Web users and the diversity of Web applications continues to explode, Web Quality of Service (QoS) is an increasingly critical issue in the domain of e-commerce This paper presents experiments designed to estimate users' tolerance of QoS in the context of e-commerce In addition to objective measures, we discuss contextual factors that influence these thresholds and show how users' conceptual models of Web tasks affect their expectations We then show how user thresholds of tolerance can be taken into account when designing Web servers This integration of user requirements for QoS into systems design is ultimately of benefit to all stakeholders in the design of Internet services

Starting up at least one virtual machine in a physical machine by a load balancer

Abstract: A system has plural physical machines that contain virtual machines. A load balancer receives a request from a client. In response to the request, it is determined whether at least one additional virtual machine should be started up. In response to determining that at least one additional virtual machine should be started up, the load balancer sends at least one command to start up the at least one additional virtual machine in at least one of the physical machines.

Temperature- and magnetic-field-dependent longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond.

Abstract: We present an experimental study of the longitudinal electron-spin relaxation time (T1) of negatively charged nitrogen-vacancy (NV) ensembles in diamond. T1 was studied as a function of temperature from 5 to 475 K and magnetic field from 0 to 630 G for several samples with various NV and nitrogen concentrations. Our studies reveal three processes responsible for T1 relaxation. Above room temperature, a two-phonon Raman process dominates; below room temperature, we observe an Orbach-type process with an activation energy of 73(4) meV, which closely matches the local vibrational modes of the NV center. At yet lower temperatures, sample dependent cross-relaxation processes dominate, resulting in temperature independent values of T1 from milliseconds to minutes. The value of T1 in this limit depends sensitively on the magnetic field and can be tuned by more than 1 order of magnitude.