Search results for "face"
showing 10 items of 11436 documents
Uniformization of two-dimensional metric surfaces
2014
We establish uniformization results for metric spaces that are homeomorphic to the Euclidean plane or sphere and have locally finite Hausdorff 2-measure. Applying the geometric definition of quasiconformality, we give a necessary and sufficient condition for such spaces to be QC equivalent to the Euclidean plane, disk, or sphere. Moreover, we show that if such a QC parametrization exists, then the dilatation can be bounded by 2. As an application, we show that the Euclidean upper bound for measures of balls is a sufficient condition for the existence of a 2-QC parametrization. This result gives a new approach to the Bonk-Kleiner theorem on parametrizations of Ahlfors 2-regular spheres by qu…
Nodular cast iron fatigue lifetime in cyclic plane bending
2012
The fatigue behavior of a component is strongly dependent on the material and its surface condition. Therefore, the manner in which the surface is prepared during component manufacturing (surface roughness, residual stresses etc.) has a decisive role in dictating the initiation time for fatigue cracks. The fatigue behavior of the same material, a nodular cast iron, with three different surface conditions (fine ground, sand blast and as-cast) has been investigated under cyclic plane bending. The results show differences in fatigue strength, which are associated with the surface conditions. The characteristics of the surface layers of the different test specimens were examined by metallograph…
Microwave response of bulk MgB2 samples of different granularity
2006
The microwave response of three high-density bulk MgB2 samples has been investigated in the linear and nonlinear regimes. The three samples, characterized by different mean size of grains, have been obtained by reactive infiltration of liquid Mg in powdered B preforms. The linear response has been studied by measuring the microwave surface impedance; the nonlinear response by detecting the power radiated by the sample at the second-harmonic frequency of the driving field. Our results suggest that bulk MgB2 prepared by the liquid Mg infiltration technique is particularly promising for manufacturing resonant cavities operating at microwave frequencies.
MIGRATIONS AND THE CENTER OF THE AFRICAN FACE OF SICILY
2010
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Alpha frequency discrepancy and trait anxiety, activation, and inhibition in states of anxiety and mindfulness
2018
Meditaatiotekniikat tarjovat laajalti mahdollisuuksia hyvinvoinnin ylläpitämiseen ja kehittämiseen sekä stressin lievittämiseen. Useat neurotieteelliset tutkimukset ovat osoittaneet välittömiä tuloksia meditatitiivisten tekniikoiden soveltamisen ja aivojen oskillatoristen mekanismien välisessä suhteessa. Meditaatiolla on osoitettu olevan myös pitkäaikaisia vaikutuksia, joihin sisältyy ahdistuneisuuden ja murheen väheneminen. Keskittymistä tukevan aivokäyttöliittymän alustavan suunnittelun tueksi tutkittiin alpha-aallonpituuden käyttäytymistä ahdistuneisuuden ja mindfulnessin tiloissa ja niiden välisiä eroja lähestyttiin aktivaatio-/inhibitio -persoonallisuuspiirteiden sekä ahdistuneisuuteen…
How brain-computer interface technology may improve the diagnosis of the disorders of consciousness: A comparative study
2022
ObjectiveClinical assessment of consciousness relies on behavioural assessments, which have several limitations. Hence, disorder of consciousness (DOC) patients are often misdiagnosed. In this work, we aimed to compare the repetitive assessment of consciousness performed with a clinical behavioural and a Brain-Computer Interface (BCI) approach.Materials and methodsFor 7 weeks, sixteen DOC patients participated in weekly evaluations using both the Coma Recovery Scale-Revised (CRS-R) and a vibrotactile P300 BCI paradigm. To use the BCI, patients had to perform an active mental task that required detecting specific stimuli while ignoring other stimuli. We analysed the reliability and the effic…
Micelles in Mixtures of Sodium Dodecyl Sulfate and a Bolaform Surfactant
2006
Mixtures composed of water, sodium dodecyl sulfate (SDS), and a bolaform surfactant with two aza-crown ethers as polar headgroups (termed Bola C-16) were investigated by modulating the mole ratios between the components. The two surfactants have ionic and nonionic, but ionizable, headgroups, respectively. The ionization is due to the complexation of alkali ions by the aza-crown ether unit(s). Structural, thermodynamic, and transport properties of the above mixtures were investigated. Results from surface tension, translational self-diffusion, and small angle neutron scattering ( SANS) are reported and discussed. Interactions between the two surfactants to form mixed micelles result in a com…
Resurssien haltuunoton esittäminen mobiilipeleissä ja Clash of Clans -pelin resurssien haltuunoton heuristinen arviointi
2015
Resurssienhaltuunottoonpieniosaaudiovisuaalistapelisuunnittelua. Resurssienantaminenpelaajalleonmyöstärkeätapapitääylläpelaajanmielenkiin- toa peliin, ja niiden myyminen taas tärkeä osa pelin monetisaatiota. Tässä tutkiel- massa kuvaillaan pelin Clash of Clans tapaa esittää resurssien haltuunottoa ja ar- vioidaannäitätapojamobiilipelienpelattavuusheuristiikoilla.Tuloksinasaatiin,että Clash of Clans noudatti viittä kuudesta heuristiikasta. Huomionarvoista on kuiten- kin se, että hyödynnetyt heuristiikkakokoelmat ovat ajalta ennen free-to-play mo- biilipelaamisen yleistymistä. Resource gathering is an important part of audiovisual game design. Gi- ving resources to the player is also importan…
Designing New learning Environments for Music - Implementing the MobiKid experience
2009
In 2006-2008 a mobile software application MobiKid for children aged 3-6 was developed to allow children to sing, record and listen to the songs independently at home. They could even forward the recorded songs to be downloaded from a server by their teacher and relatives. With not yet completed user interface (UI) features the program offered children a motivating context for singing and musical creativity. The child-centered MobiKid UI was developed collaboratively by different experts of music education and software engineering. MobiKid pilot study was expected to reflect the preliminary requirements for child-centered software and usability features for further development among informa…
Automatic Generation of User Interfaces using the Set Description Language
2004
We present a paradigm to generate automatically graphical user interfaces from a formal description of the data model following the well-known model-view-control paradigm. This paradigm provide complete separation between data model and interface description, setting the programmer free from the low-level aspects of programming interfaces, letting him take care of higher level aspects. The interface along with the data model is described by means of a formal language, the Set Description Language. We also describe the infrastructure based on this paradigm we implemented to generate graphical user interfaces for generic applications. Moreover, it can adapt the user interface of a program to …