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Din sökning på "polarization of sound" gav 779 sökträffar

Polarization charge of particles near threshold due to the coupling to shape oscillations

It is shown that the isoscalar strength in the energy region just above the low energy threshold, which is created by exciting particles to the continuum in nuclei far from β-stability lines, can be reduced by the attractive coupling to isoscalar shape oscillations. This is in contrast to the well known fact that in β-stable nuclei low lying isoscalar particle hole strengths are always increased b

Interference of 7-hydroxymethotrexate with the determination of methotrexate in plasma samples from children with acute lymphoblastic leukemia employing routine clinical assays

The accuracy of two clinical assays, the enzyme-multiplied immunoassay (EMIT) and fluorescence polarization immunoassay (FPIA2), universally employed for measurement of plasma levels of methotrexate (MTX) in children administered a high dose of this drug for treatment of acute lymphoblastic leukemia was evaluated here. Because of its superior specificity, sensitivity, and precision, high performan

Effect of bi-layer interconnector design on mass transfer performance in porous anode of solid oxide fuel cells

We propose a novel interconnector design, termed bi-layer interconnector, for solid oxide fuel cells (SOFCs). It can disturb the fuel gas and air on the planes normal to the SOFC three-phase-boundary (TPB) layer. In this paper, a two-dimensional half-cell model is developed to study the concentration overpotentials in the fuel side of the SOFC stack with conventional and novel bi-layer interconnec

Response of a free-flying songbird to an experimental shift of the light polarization pattern around sunset

The magnetic field, the sun, the stars and the polarization pattern of visible light during twilight are important cues for orientation in nocturnally migrating songbirds. As these cues change with time and location on Earth, the polarization pattern was put forward as a likely key reference system calibrating the other compass systems. Whether this applies generally to migratory birds is, however

Wide-Angle Radome Design for Low-Cost Additive Manufacturing

En radar använder elektromagnetiska vågor för att kunna skicka och motta signaler. Precis på samma sätt som att våra öron, ögon och tungor är mottagare och vår röst och vårt kroppsspråk är sändare av signaler till världen omkring oss. För både människan och för radarn så behövs det skydd mot omgivningen. Till exempel, har våra ögon ögonlock och vår röst är dold inne i halsen. Utan ögonlock skulle The radome, a portmanteau of the words radar and dome, is a protective dielectric cover to protect a radar from its surrounding environment. The surrounding environment can be rain, wind, sand, dust and whatever else that might harm the radar. Radomes come in many different shapes, materials and thicknesses, where each of these parameters are decided based on the need for the given radar applicati

Thermal stress analysis of a planar anode-supported solid oxide fuel cell : Effects of anode porosity

A Fuel cell is a highly efficient device for converting chemical energy in fuels to electrical energy and the electrical efficiency is strongly affected by the porosity in electrodes due to its close couplings with mass transfer and active sites for the electrochemical reactions, which will also cause changes in distribution of thermal stresses inside the electrodes. A three-dimensional computatio

Cfewp30

Andreas Önnerfors MONTERAD FINAL.indd 1 Från Kadmos till CAP – åtta uppsatser om europeiska nätverk, nationer och narrativ 2 3 Från Kadmos till CAP – åtta uppsatser om europeiska nätverk, nationer och narrativ Andreas Önnerfors (utg.) CFE Working papers series No. 30 Lund 2005 4 Omslagsillustration: Carl Milles, ”Europa och tjuren”, Stortorget i Halmstad Foto: Kristiina Savin CFE Working Papers se

https://www.cfe.lu.se/en/sites/cfe.lu.se.en/files/2020-12/cfewp30.pdf - 2026-06-14

VB 2018 Tillgänglig 0

CFE verksamhetsberättelse 2018 (tillgänglig) Verksamhetsberättelse 2018 Centrum för europaforskning 1 Centrum för europaforskning Verksamhetsberättelse 2018 Verksamhetsberättelse 2018 Centrum för europaforskning 2 Nedan redovisas 2018 års verksamhet inom Centrum för europaforskning. Redovisningen är uppdelad i de fyra huvuduppdrag som centret arbetar med: • Att främja av samverkan mellan instituti

https://www.cfe.lu.se/en/sites/cfe.lu.se.en/files/2021-04/VB%202018%20tillg%C3%A4nglig_0.pdf - 2026-06-14

Cichlids respond to conspecific sounds but females exhibit no phonotaxis without the presence of live males

Many fish species are able to produce sounds, which are often associated with courtship. In an earlier study, we showed for the Lake Victoria cichlid Pundamilia nyererei that females prefer to associate with a male with sound over a male without sound. As a follow-up to this earlier finding, we here investigated whether playback of conspecific sounds is sufficient to attract females in the absence

“Not a Sight, but a Sound” : Listening in E. M. Forster’s A Passage to India

This article examines what happens when we listen to E. M. Forster’s A Passage to India (1924), suggesting that sound has several important functions in the novel, which relate both to the conflicts between the different cultural groupings and to the existential questions that underpin the plot. In making a distinction both between eye and ear, and then between hearing and listening, the article a

Honeybee navigation: critically examining the role of the polarization compass

Although it is widely accepted that honeybees use the polarized-light pattern of the sky as a compass for navigation, there is little direct evidence that this information is actually sensed during flight. Here, we ask whether flying bees can obtain compass cues derived purely from polarized light, and communicate this information to their nest-mates through the 'waggle dance'. Bees, from an obser

Sound propagation over inhomogeneous ground including a sound velocity profile

The atmospheric profile whose sound speed varies linearly with height is simple in concept, but leads to complications when solving for the sound pressure. Its effects are commonly approximated by a similar profile whose squared refractive index is a linear function of height. In this paper, the validity of the approximation has been examined for sound propagation above an impedance ground and a c

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ULF DAHLSTRAND, JENNY HULT (IKVL, LU, ÖGONKLINIKEN SUS) Fotoakustik för detektion och avgränsning av hudtumörer Kliniska problem Historiskt… … och än idag! Tumören borta Lagom Tumörceller kvar För snävt Onödigt stor defekt För stor marginal Existerande metoder för diagnos och avgränsning Dermatoskopi • Visuell metod • Ytlig undersökning • Kräver mycket träning för att bemästra • Subjektiv Konfokal

https://www.mlc.lu.se/fileadmin/mlc/Minnesanteckningar/Fotoakustik_foer_detektion_och_avgraensning_av_hudtumoerer.pdf - 2026-06-13

Challenges and some new directions in channel coding

Three areas of ongoing research in channel coding are surveyed, and recent developments are presented in each area: spatially coupled Low-Density Parity-Check (LDPC) codes, non-binary LDPC codes, and polar coding.

Two-photon excitation in fluorescence polarization receptor-ligand binding assay

Fluorescence polarization is one of the most commonly used homogeneous assay principles in drug discovery for screening of potential lead compounds. In this article, the fluorescence polarization technique is combined with 2-photon excitation of fluorescence. Theoretically, the use of 2-photon excitation of fluorescence increases the volumetric sensitivity and polarization contrast of fluorescence

VB 2019 Tillgänglig 0

CFE verksamhetsberättelse 2019 (tillgänglig) Verksamhetsberättelse 2019 Centrum för europaforskning 1 Centrum för europaforskning Verksamhetsberättelse 2019 Verksamhetsberättelse 2019 Centrum för europaforskning 2 Nedan redovisas 2019 års verksamhet inom Centrum för europaforskning. Redovisningen är uppdelad i de fyra huvuduppdrag som centret arbetar med: • Att främja av samverkan mellan instituti

https://www.cfe.lu.se/en/sites/cfe.lu.se.en/files/2021-04/VB%202019%20tillg%C3%A4nglig_0.pdf - 2026-06-14

Verksamhetsberattelse 2019

2019 -Verksamhetsberättelse rev Centrum för europaforskning Verksamhetsberättelse 2019 2 Nedan redovisas 2019 års verksamhet inom Centrum för europaforskning. Redovisningen är uppdelad i de fyra huvuduppdrag som centret arbetar med: o Att främja av samverkan mellan institutioner och enskilda forskare vid Lunds universitet som är engagerade i forskning om Europa o Att främja utbildning om Europa o

https://www.cfe.lu.se/sites/cfe.lu.se/files/2020-12/verksamhetsberattelse_2019.pdf - 2026-06-14

Modular Polarization-Engineered Optical Phased Arrays for Optical Wireless Indoor Networks

The growing passion for indoor optical wireless networks reflects their immense capability to deliver consistent high-quality data connectivity across diverse indoor environments. This study examines how polarization can be engineered to enhance near-field beam focusing in optical wireless indoor networks using a modular clustered optical phased array aperture. The aperture follows a ceiling-mount