2,188 research outputs found
Recommended from our members
Scientific Findings of the Neskak Gora Project on Second Generation Immigrant Girls and Young Women from North African and South Asian Families in Europe
Research project “Neskak Gora” on discrimination against young second generation female migrants in six European countrie
Political Political Theory Theory
Book review: Political political theory: essays on institutions. By Jeremy Waldron. Harvard University Press, 2016. 403 pages. Reviewed by Jeremy D. Farris and William A. Edmundso
Effect of muscle force during stretch on eccentric contraction-induced muscle damage
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recor
Mechanical and energetic determinants of optimal cycling cadence
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recor
The evolution of gregariousness in parasitoid wasps
Data are assembled on the clutch-size strategies adopted by extant species of parasitoid wasp. These data are used to reconstruct the history of clutch-size evolution in the group using a series of plausible evolutionary assumptions. Extant families are either entirely solitary, both solitary and gregarious, or else clutch size is unknown. Parsimony analysis suggests that the ancestors of most families were solitary, a result which is robust to different phylogenetic relationships and likely data inadequacies. This implies that solitariness was ubiquitous throughout the initial radiation of the group, and that transitions to gregariousness have subsequently occurred a minimum of 43 times in several, but not all lineages. Current data suggest that species-rich and small-bodied lineages are more likely to have evolved gregariousness, and contain more species with small gregarious brood sizes. I discuss the implications of these data for clutch-size theory
Deconstructing the power resistance relationship for squats: a joint-level analysis
Generating high leg power outputs is important for executing rapid movements. Squats are commonly used to increase leg strength and power. Therefore, it is useful to understand factors affecting power output in squatting. We aimed to deconstruct the mechanisms behind why power is maximized at certain resistances in squatting. Ten male rowers (age = 20 ± 2.2 years; height = 1.82 ± 0.03 m; mass = 86 ± 11 kg) performed maximal power squats with resistances ranging from body weight to 80% of their one repetition maximum (1RM). Three-dimensional kinematics was combined with ground reaction force (GRF) data in an inverse dynamics analysis to calculate leg joint moments and powers. System center of mass (COM) velocity and power were computed from GRF data. COM power was maximized across a range of resistances from 40% to 60% 1RM. This range was identified because a trade-off in hip and knee joint powers existed across this range, with maximal knee joint power occurring at 40% 1RM and maximal hip joint power at 60% 1RM. A non-linear system force-velocity relationship was observed that dictated large reductions in COM power below 20% 1RM and above 60% 1RM. These reductions were due to constraints on the control of the movement
Inferior vena cava branch variations in C57BL/6 mice have an impact on thrombus size in an IVC ligation (stasis) model
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/110835/1/jth12866.pd
The performance of the MROI fast tip-tilt correction system
The fast tip-tilt (FTT) correction system for the Magdalena Ridge Observatory Interferometer (MROI) is being developed by the University of Cambridge. The design incorporates an EMCCD camera protected by a thermal enclosure, optical mounts with passive thermal compensation, and control software running under Xenomai real-time Linux. The complete FTT system is now undergoing laboratory testing prior to being installed on the first MROI unit telescope in the fall of 2014. We are following a twin-track approach to testing the closed-loop performance: tracking tip-tilt perturbations introduced by an actuated flat mirror in the laboratory, and undertaking end-to-end simulations that incorporate realistic higher-order atmospheric perturbations. We report test results that demonstrate (a) the high stability of the entire opto-mechanical system, realized with a completely passive design; and (b) the fast tip-tilt correction performance and limiting sensitivity. Our preliminary results in both areas are close to those needed to realise the ambitious stability and sensitivity goals of the MROI which aims to match the performance of current natural guide star adaptive optics systems.Previously funded by the Naval Research Laboratory (under Agreement No. N00173-01-2-C902), MROI is currently funded by the US Department of Transportation, the State of New Mexico and by New Mexico Tech
- …