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.

Application security testing

Abstract: The present disclosure provides a system that includes a server hosting an application under test (AUT), an observer configured to monitor instructions executed by the AUT, and a computing device communicatively coupled to the AUT and the observer through a common communication channel. The computing device may be configured to send an application request to the AUT, wherein the application request is configured to expose a potential vulnerability of the AUT. The computing device may receive an application response from the AUT in accordance with the AUT's programming. The computing device may send a service request to the observer, and receive a service response from the observer that contains information corresponding to the instructions executed by the AUT due to the application request, information about the AUT, or information about a server hosting the AUT.

Understanding and Designing New Server Architectures for Emerging Warehouse-Computing Environments

Abstract: This paper seeks to understand and design next-generation servers for emerging "warehouse-computing" environments. We make two key contributions. First, we put together a detailed evaluation infrastructure including a new benchmark suite for warehouse-computing workloads, and detailed performance, cost, and power models, to quantitatively characterize bottlenecks. Second, we study a new solution that incorporates volume non-server-class components in novel packaging solutions, with memory sharing and flash-based disk caching. Our results show that this approach has promise, with a 2X improvement on average in performance-per-dollar for our benchmark suite.

Inversion of Spin Polarization and Tunneling Magnetoresistance in Spin-Dependent Tunneling Junctions

Abstract: An inversion of spin polarization has been observed in spin-dependent tunneling (SDT) junctions with ${\mathrm{Ta}}_{2}{\mathrm{O}}_{5}$ and ${\mathrm{Ta}}_{2}{\mathrm{O}}_{5}/{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ barriers. The resistance of an SDT junction is found to be lower with magnetization of the ferromagnetic electrodes aligned antiparallel under specific voltage configurations. The tunneling magnetoresistance effect changes sign with applied voltage and varies from $+1%$ to $\ensuremath{-}4%$ at room temperature. This inversion is believed to be due to the change in sign with bias of the spin polarization of one of the two electrodes. The strong dependence on voltage suggests negative spin polarization could arise from the densities of states for spins being different at the two electrode/barrier interfaces.

Twinkling lights and nested loops: distributed problem solving and spreadsheet development

Abstract: In contrast to the common view of spreadsheets as “single-user” programs, we have found that spreadsheets offer surprisingly strong support for cooperative development of a wide variety of applications. Ethnographic interviews with spreadsheet users showed that nearly all of the spreadsheets used in the work environments studied were the result of collaborative work by people with different levels of programming and domain expertise. We describe how spreadsheet users cooperate in developing, debugging and using spreadsheets. We examine the properties of spreadsheet software that enable cooperation, arguing that: (1) the division of the spreadsheet into two distinct programming layers permits effective distribution of computational tasks across users with different levels of programming skill; and (2) the spreadsheet's strong visual format for structuring and presenting data supports sharing of domain knowledge among co-workers.