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Showing 1 to 12 of 147 entries
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Participative Facility Planning for Obstetrical and Neonatal Care Processes: Beginning of Life Process.

Journal of healthcare engineering

Reijula J, Karvonen S, Petäjä H, Reijula K, Lehtonen L.
PMID: 29058863
J Healthc Eng. 2016;2016. doi: 10.1155/2016/7836493.

INTRODUCTION: Old hospitals may promote inefficient patient care processes and safety. A new, functionally planned hospital presents a chance to create an environment that supports streamlined, patient-centered healthcare processes and adapts to users' needs. This study depicts the phases...

Coherent-mode representation of partially polarized pulsed electromagnetic beams.

Journal of the Optical Society of America. A, Optics, image science, and vision

Voipio T, Setälä T, Friberg AT.
PMID: 24322946
J Opt Soc Am A Opt Image Sci Vis. 2013 Nov 01;30(11):2433-43. doi: 10.1364/JOSAA.30.002433.

Coherent-mode representation provides physical insight and computational simplification into the analysis of random optical signals. In this work, we present the coherent-mode decomposition for pulsed electromagnetic beam fields. We show that the mode decomposition can be done for any...

Generation of nearly 3D-unpolarized evanescent optical near fields using total internal reflection.

Optics letters

Hassinen T, Popov S, Friberg AT, Setälä T.
PMID: 27367071
Opt Lett. 2016 Jul 01;41(13):2942-5. doi: 10.1364/OL.41.002942.

We analyze the time-domain partial polarization of optical fields composed of two evanescent waves created in total internal reflection by random electromagnetic beams with orthogonal planes of incidence. We show that such a two-beam configuration enables to generate nearly...

Corrigendum: Polluted dust promotes new particle formation and growth.

Scientific reports

Nie W, Ding A, Wang T, Kerminen VM, George C, Xue L, Wang W, Zhang Q, Petäjä T, Qi X, Gao X, Wang X, Yang X, Fu C, Kulmala M.
PMID: 25735455
Sci Rep. 2015 Mar 04;5:8949. doi: 10.1038/srep08949.

No abstract available.

Rotational frequency shifts in partially coherent optical fields.

Journal of the Optical Society of America. A, Optics, image science, and vision

Hautakorpi M, Lindberg J, Setälä T, Kaivola M.
PMID: 16642194
J Opt Soc Am A Opt Image Sci Vis. 2006 May;23(5):1159-63. doi: 10.1364/josaa.23.001159.

We study the frequency shifts taking place when a random, stationary optical field rotates with respect to an observer. The field is expanded in terms of fully coherent Laguerre-Gaussian basis modes, for which the rotational frequency shifts have been...

Theory of partially coherent electromagnetic fields in the space-frequency domain.

Journal of the Optical Society of America. A, Optics, image science, and vision

Tervo J, Setälä T, Friberg AT.
PMID: 15535379
J Opt Soc Am A Opt Image Sci Vis. 2004 Nov;21(11):2205-15. doi: 10.1364/josaa.21.002205.

We construct the coherent-mode representation for fluctuating, statistically stationary electromagnetic fields. The modes are shown to be spatially fully coherent in the sense of a recently introduced spectral degree of electromagnetic coherence. We also prove that the electric cross-spectral...

Toward direct measurement of atmospheric nucleation.

Science (New York, N.Y.)

Kulmala M, Riipinen I, Sipilä M, Manninen HE, Petäjä T, Junninen H, Maso MD, Mordas G, Mirme A, Vana M, Hirsikko A, Laakso L, Harrison RM, Hanson I, Leung C, Lehtinen KE, Kerminen VM.
PMID: 17761851
Science. 2007 Oct 05;318(5847):89-92. doi: 10.1126/science.1144124. Epub 2007 Aug 30.

Atmospheric aerosol formation is known to occur almost all over the world, and the importance of these particles to climate and air quality has been recognized. Although almost all of the processes driving aerosol formation take place below a...

Spatial coherence effects in light scattering from metallic nanocylinders.

Journal of the Optical Society of America. A, Optics, image science, and vision

Lindberg J, Setälä T, Kaivola M, Friberg AT.
PMID: 16715153
J Opt Soc Am A Opt Image Sci Vis. 2006 Jun;23(6):1349-58. doi: 10.1364/josaa.23.001349.

We study the scattering of a partially coherent electromagnetic beam from metallic nanocylinders and analyze the effects of plasmon resonances on the coherence and polarization properties of the optical near field. We employ the coherent-mode representation for the incident...

Dipole-dipole interaction between molecules mediated by a chain of silver nanoparticles.

Journal of the Optical Society of America. A, Optics, image science, and vision

Lindberg J, Lindfors K, Setälä T, Kaivola M.
PMID: 17975568
J Opt Soc Am A Opt Image Sci Vis. 2007 Nov;24(11):3427-31. doi: 10.1364/josaa.24.003427.

We study the dipole-dipole coupling between two fluorescent molecules in the presence of a chain of metallic nanoparticles. We analyze the spectral behavior of the coupling strength and its dependence on the molecular orientation. Our results show that for...

Subwavelength electromagnetic near-field imaging of point dipole with metamaterial nanoslab.

Journal of the Optical Society of America. A, Optics, image science, and vision

Hakkarainen T, Setälä T, Friberg AT.
PMID: 19798404
J Opt Soc Am A Opt Image Sci Vis. 2009 Oct;26(10):2226-34. doi: 10.1364/JOSAA.26.002226.

We investigate near-field imaging of a point dipole by a lossy, nanoscale metamaterial slab. Making use of the electromagnetic angular-spectrum representation, we derive the Green tensor for the field transmission through the metamaterial slab, duly considering multiple reflections, polarizations,...

Effect of absorption on the spatial coherence in scalar fields generated by statistically homogeneous and isotropic sources.

Physical review. E, Statistical, nonlinear, and soft matter physics

Blomstedt K, Setälä T, Friberg AT.
PMID: 16383768
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Nov;72(5):056604. doi: 10.1103/PhysRevE.72.056604. Epub 2005 Nov 08.

We investigate the behavior of the spectral degree of coherence of fluctuating scalar wave fields generated by statistically homogeneous and isotropic sources within absorbing media. In the limit of negligible losses, the degree of coherence is shown to be...

Effect of post-mortem temperature on beef tenderness.

Meat science

Petäjä E, Kukkonen E, Puolanne E.
PMID: 22055255
Meat Sci. 1985;12(3):145-54. doi: 10.1016/0309-1740(85)90014-2.

Beef adductor muscles were incubated for 4 h post mortem at 10°C and for 4 h and 6 h post mortem at 30°C, 37°C and 42°C. Half of the muscles were cooked just after incubation and the other half...

Showing 1 to 12 of 147 entries