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Study of isomeric states in 198,200,202,206Pb and 206Hg populated in fragmentation reactions

Isomeric states in isotopes in the vicinity of doubly-magic 208Pb were populated following reactions of a relativistic 208Pb primary beam impinging on a 9Be fragmentation target. Secondary beams of 198,200,202,206Pb and 206Hg were isotopically separated and implanted in a passive stopper positioned in the focal plane of the GSI Fragment Separator. Delayed γ rays were detected with the Advanced Gam

Klassisk karaktär. Den moraliska samhällsnyttan av klassiska studier, ca 1807–1828

I denna uppsats undersöks sambandet mellan klassiska studier och moralisk fostranunder 1800-talets tre första decennier. Utifrån en genomgång av reformmaterial,debattryck och artiklar spåras argument om antikstudiets samhällsnytta. Återkommande framhölls dess betydelse för att utveckla karaktärsdrag som manlighet, fosterlandskärlek och pliktuppfyllande i debatten. Klassiska språk och antik littera

Computational models for spatiotemporal filtering strategies in insect motion vision at low light levels

We explore a promising new approach to understanding the neural filter mechanisms intermediate in motion processing at low luminance. We carefully account for the known filter properties of early stages of visual processing in a nocturnal moth, and then measured spatiotemporal tuning of higher order neurons. We then use a computational model to identify likely strategies used to reject noisy signa

Hunter-gatherer olfaction is special

People struggle to name odors [1–4]. This has been attributed to a diminution of olfaction in trade-off to vision [5–10]. This presumption has been challenged recently by data from the hunter-gatherer Jahai who, unlike English speakers, find odors as easy to name as colors [4]. Is the superior olfactory performance among the Jahai because of their ecology (tropical rainforest), their language fami

Effects of growth and aging on the reference values of pulmonary nitric oxide dynamics in healthy subjects

The lung just like all other organs is affected by age. The lung matures by the age of 20 and age-related changes start around middle age, at 40-50 years. Exhaled nitric oxide (FENO) has been shown to be age, height and gender dependent. We hypothesize that the nitric oxide (NO) parameters alveolar NO (CANO), airway flux (JawNO), airway diffusing capacity (DawNO) and airway wall content (CawNO) wi

Influence of the rotor configuration on the electrostatic charging of helicopters

A helicopter flying through an atmosphere containing particulates may accumulate high electrostatic charges that can challenge its operational safety. In this paper the influence of the helicopter configuration on its electrification is reported. The current study is based on a recently developed numerical approach in which the turbulent airflow around the rotorcraft is estimated via large-eddy si

Dynamic Magnetic Model Identification of Permanent Magnet Synchronous Machines

This paper presents a dynamic method that derives the magnetic model of permanent magnet synchronous machines. The method uses the moment of inertia of the rotating parts to limit the speed dynamics while specific stator winding currents accelerate and brake the machine. Measurements of the rotor position and the phase voltages give the voltages in the dq frame and the rotational frequency, which

An optimization model for affine flow thinning - A traffic protection mechanism for FSO networks

Flow thinning (FT) is an active traffic protection mechanism destined for communication networks with variable capacity of links, as for example wireless networks. In FT, end-to-end traffic demands are equipped with dedicated logical tunnels (for example MPLS tunnels) whose maximal capacity is subject to thinning in order to follow the fluctuations of the currently available link capacity. It foll

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Artikeln går på djupet i utvalda prosaomskrivningar av historien om hjälten Theseus från Köln och täcker versioner från 1300- till 1700-talet. Den undersöker hur de är uppbyggda, språkligt, strukturellt och innehållsligt, och i vilka yttre kontexter de nya versionerna dyker upp.

Effects of voids in tensile single-crystal Cu nano-beams

Molecular dynamic simulations of defect nano-sized beams of single-crystal Cu, loaded in displacement controlled tension until rupture, have been performed. The defects are square-shaped, through-the-thickness voids of different sizes, placed centrally in the beams. Three different cross section sizes and two different crystallographic orientations are investigated. As expected, the sizes of the b

Comparative genomics reveals that loss of lunatic fringe (LFNG) promotes melanoma metastasis

Metastasis is the leading cause of death in patients with advanced melanoma, yet the somatic alterations that aid tumour cell dissemination and colonisation are poorly understood. Here, we deploy comparative genomics to identify and validate clinically relevant drivers of melanoma metastasis. To do this, we identified a set of 976 genes whose expression level was associated with a poor outcome in

Labile carbon 'primes' fungal use of nitrogen from submerged leaf litter

Microbial decomposers colonising submerged leaf litter are in close spatial proximity with periphytic algae and can use carbon (C) exudates released during photosynthesis. We investigated whether labile C delivered as algal exudates could affect the microbial colonisation and decomposition of leaf litter. Using microcosms, we submerged leaf litter in pond water and monitored fungal and bacterial g