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Now showing items 21-40 of 184

Chirality arising from small defects in gold nanoparticle arrays

Canfield, Brian K.; Kujala, Sami; Laiho, Kaisa; Jefimovs, Konstantins; Turunen, Jari; Kauranen, Martti (2006)

The symmetry of metal nanostructures may be broken by their overall features or small-scale defects. To separate the roles of these two mechanisms in chiral symmetry breaking, we prepare gold nanostructures with chirality ...
Transient ordered domains in single-component phospholipid bilayers

Murtola, Teemu; Rog, Tomasz; Falck, Emma; Karttunen, Mikko; Vattulainen, Ilpo (2006)

We report evidence of dense, ordered nanodomains in single-component fluid lipid bilayers. Our atomic-scale molecular dynamics simulations suggest that the area available to a lipid acyl chain exhibits large fluctuations, ...
Utilization of an indoor DAS for repeater deployment in WCDMA

Borkowski, Jakub; Niemelä, Jarno; Isotalo, Tero; Lähdekorpi, Panu; Lempiäinen, Jukka (2006)

The aim of this paper is to assess the applicability of a repeater connected to a distributed antenna system for improving indoor capacity in UMTS radio network. A guarantee of sufficient coverage and capacity for in-building ...
Measurements for distributed antennas in WCDMA indoor network

Isotalo, Tero; Niemelä, Jarno; Lempiäinen, Jukka (2006)

The target of the paper is to provide guidelines for indoor antenna selection for passive distributed antenna system or radiating cable implementation. Distributed antenna systems are commonly used for indoor installations, ...
Multipolar tensor analysis of second-order nonlinear optical response of surface and bulk of glass

Rodriguez, Francisco J.; Wang, Fu Xiang; Canfield, Brian K.; Cattaneo, Stefano; Kauranen, Martti (2007)

We use two-beam second-harmonic generation to perform a quantitative tensor analysis of the effective dipolar surface nonlinearity and the separable multipolar bulk nonlinearity for BK7 glass. The most straightforward, ...
An ordinal co-occurrence matrix framework for texture retrieval

Partio, Mari; Cramariuc, Bogdan; Gabbouj, Moncef (2007)

We present a novel ordinal co-occurrence matrix framework for the purpose of content-based texture retrieval. Several particularizations of the framework will be derived and tested for retrieval purposes. Features obtained ...
Assessing the nature of lipid raft membranes

Niemelä, Perttu S.; Ollila, Samuli; Hyvönen, Marja T.; Karttunen, Mikko; Vattulainen, Ilpo (2007)

The paradigm of biological membranes has recently gone through a major update. Instead of being fluid and homogeneous, recent studies suggest that membranes are characterized by transient domains with varying fluidity. In ...
Reptational dynamics in dissipative particle dynamics simulations of polymer melts

Nikunen, Petri; Vattulainen, Ilpo; Karttunen, Mikko (2007)

Understanding the fundamental properties of polymeric liquids remains a challenge in materials science and soft matter physics. Here, we present a simple and computationally efficient criterion for topological constraints, ...
Polarized second-harmonic generation with broadband femtosecond pulses

Canfield, Brian K.; Laiho, Kaisa; Kauranen, Martti (2007)

We computationally investigate polarized second-harmonic generation (SHG) of a spectrally broad femtosecond pulse following transmission through traditional quarter wave plates (QWPs). Because the sideband modes of a ...
Strong enhancement of second-harmonic generation in all-dielectric resonant waveguide grating

Siltanen, Mikael; Leivo, Samuli; Voima, Pauliina; Kauranen, Martti; Karvinen, Petri; Vahimaa, Pasi; Kuittinen, Markku (2007)

The authors demonstrate that a dielectric resonant waveguide grating can enhance optical second-harmonic generation by a factor of 550 compared to a similar flat surface. Their structure, which consists of purely dielectric ...
Conformational analysis of lipid molecules by self-organizing maps

Murtola, Teemu; Kupiainen, Mikko; Falck, Emma; Vattulainen, Ilpo (2007)

The authors have studied the use of the self-organizing map (SOM) in the analysis of lipid conformations produced by atomic-scale molecular dynamics simulations. First, focusing on the methodological aspects, they have ...
Codesign toolset for application-specific instruction-set processors

Jääskeläinen, Pekka; Guzma, Vladimir; Cilio, Andrea; Pitkänen, Teemu; Takala, Jarmo (2007)

Application-specific programmable processors tailored for the requirements at hand are often at the center of today's embedded systems. Therefore, it is not surprising that considerable effort has been spent on constructing ...
Yhteistä vettä. Tuusulan seudun vesilaitos kuntayhtymä 1967-2007

Katko, Tapio S. (2007)
Vesihuollon haavoittuvuus

Hukka, Jarmo J.; Katko, Tapio S. (2007)
Watering the city of Tampere from the mid-1800s to the 21st century

Katko, Tapio S.; Juuti, Petri S. (2007)
Water services in Finland: Competition for non-core operations - not for monopolies, prepared for the UNRISD project on Commercialization, Privatization and Universal Access to Water

Pietilä, Pekka E.; Hukka, Jarmo J.; Katko, Tapio S.; Seppälä, Osmo T. (2007)
Coarse-grained model for phospholipid/cholesterol bilayer employing inverse Monte Carlo with thermodynamic constraints

Murtola, Teemu; Falck, Emma; Karttunen, Mikko; Vattulainen, Ilpo (2007)

The authors introduce a coarse-grained (CG) model for a lipid membrane comprised of phospholipids and cholesterol at different molar concentrations, which allows them to study systems that are approximately 100 nm in linear ...
Uniqueness of determination of second-order nonlinear optical expansion coefficients of thin films

Wang, Fu Xiang; Siltanen, Mikael; Kauranen, Martti (2007)

Second-harmonic generation from surfaces and thin films can be described by up to three nonlinear expansion coefficients, which are associated with the quadratic combinations of the p- and s-polarized components of the ...
Multipole interference in the second-harmonic optical radiation from gold nanoparticles

Kujala, Sami; Canfield, Brian K.; Kauranen, Martti; Svirko, Yuri; Turunen, Jari (2007)

We provide experimental evidence of higher multipole (magnetic dipole and electric quadrupole) radiation in second-harmonic (SH) generation from arrays of metal nanoparticles. Fundamental differences in the radiative ...
Enhanced photoinduced birefringence in polymer-dye complexes: Hydrogen bonding makes a difference

Priimägi, Arri; Kaivola, Matti; Rodriguez, Francisco J.; Kauranen, Martti (2007)

The authors demonstrate that photoinduced birefringence in azo-dye-doped polymers is strongly enhanced by hydrogen bonding between the guest molecules and the polymer host. The primary mechanism behind the enhancement is ...

Now showing items 21-40 of 184

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