Search results

Filter

Filetype

Your search for "*" yielded 534631 hits

Absolute quantification of perfusion using dynamic susceptibility contrast MRI: pitfalls and possibilities.

Absolute quantification of cerebral blood flow, cerebral blood volume and mean transit time is desirable in the determination of tissue viability thresholds and tissue at risk in acute ischaemic stroke, as well as in cases where a global reduction in cerebral blood flow is expected, for example, in patients with dementia or depressive disorders. Absolute values are also useful when comparing seque

Company for the Ultra-high Density, Ultra-short Period Sub-Earth GJ 367 b: Discovery of Two Additional Low-mass Planets at 11.5 and 34 Days

GJ 367 is a bright (V ≈ 10.2) M1 V star that has been recently found to host a transiting ultra-short period sub-Earth on a 7.7 hr orbit. With the aim of improving the planetary mass and radius and unveiling the inner architecture of the system, we performed an intensive radial velocity follow-up campaign with the HARPS spectrograph—collecting 371 high-precision measurements over a baseline of nea

Control of Liquid Slosh in an Industrial Packaging Machine

Linear movement of open containers containing liquid is considered. The design is based on a simple linearized slosh model. An open-loop acceleration trajectory is calculated using optimal control techniques. The calculated acceleration profiles are evaluated using experiments with a laser-based sensor and recordings by a video camera. The performance is better than previous ad-hoc controllers

Software Engineering Meets Control Theory

The software engineering community has proposed numerous approaches for making software self-adaptive. These approaches take inspiration from machine learning and control theory, constructing software that monitors and modifies its own behavior to meet goals. Control theory, in particular, has received considerable attention as it represents a general methodology for creating adaptive systems. Con

Dealing with Economic Stress Through Migration: Lessons from Nineteenth Century Rural Sweden

Preindustrial society was characterised by vast uncertainties due to harvest failures and fluctuations in prices of basic commodities. These economic fluctuations had severe effects on the standard of living, especially for the poorer segments of the population, as shown for instance, by the increased mortality following economic crises. This article examines the extent to which migration could be

Influence of distributed compensation on earth fault protection in cable distribution systems

The growing use of underground cables in distribution systems increases the capacitive coupling of the network to earth and as a consequence the capacitive earth fault current. In rural systems consisting of long cable feeders the extensive reactive current transportation gives rise to resistive losses that influence the earth fault protection. Simulations carried out in this work suggest the resi