Search results for "OPAL"
showing 10 items of 283 documents
Tagien käyttö ja hyödyntäminen sosiaalisissa verkkopalveluissa
2013
Tämä tutkimus keskittyi tutkimaan tagien käyttöä muutamassa tagipalveluihin erikoistuneessa sosiaalisessa verkkosivustossa. Tutkimuksen aikana huomattiin, että tageja hyödynnetään hyvin monipuolisesti näissä sivustoissa osana käyttäjälle tarjottavaa palvelukokonaisuutta: tärkeimpinä palveluina tarjottiin palveluun lisättävien objektien tagaamisen lisäksi tagisuosituksia, tagihakuja ja sosiaalista verkkotoimintaa palvelun käyttäjien kesken. Tutkimuksen lisäksi tämä tutkimus pohjustaa tageihin liittyvää teoreettista taustaa. Tämän ajateltiin olevan tärkeää, sillä tageista ei ole paljoa olemassa tutkimuksia, missä tageihin liityviä teorioita ja taustoja olisi koottuna yhteen kattavasti. This s…
Análisis criptopaleontológico del lapidario de Teofrasto (s. III a.C.)
2013
The work “Perì líthon” or Teofrasto’s “Treatise of stones” has been considered the oldest text still available about minerals and rocks, even though it has remained incomplete. In this paper, the study of its contents shows that eleven of the stones called by geographic or cryptic names are either fossils from plants or vertebrates or chemical fossils. Therefore, the “Perì líthon” should also be considered as the oldest known treatise about palaeontology, because in addition to the fossils mentioned, it refers specifically to the fossilisation process.La obra “Perì líthon” o “Tratado de Piedras” de Teofrasto, es considerado el texto más antiguo conservado sobre minerales y rocas, aunque hay…
Micro/nanostructured thin films : synthesis by ALD of composites associating TiO2 inverse opals and gold nanoparticles for photocatalysis applications
2021
The aim of this work was to improve the photocatalytic properties of titanium dioxide (TiO2) thin films, a semiconductor that is widely used for photocatalysis applications, particularly for the treatment of polluted water. For this purpose, two complementary approaches were studied: increasing the surface area available for photocalatytic reactions and coupling between TiO2 and gold nanoparticles.. For the first approach, TiO2 thin films with different morphological structures were fabricated by Atomic Layer Deposition: dense and porous flat films, and inverse opals films.In order to evaluate photocatalytic activity of the different films, the degradation of methylene blue in aqueous solut…
Inverse opal TiO2 as visible-light driven photocatalysts
2017
Semiconductor photocatalysts have attracted a great deal of attention due to their potential application in environmental remediation. Titanium dioxide has been extensively investigated as the most promising photocatalyst. To improve the optical response of TiO2 in the visible region, Inverse Opal TiO2 has been recognized as an efficient photocatalyst due to its unique properties in terms of uniformly ordered and interconnected macroporous architecture.
Comparison of laser and power bleaching techniques in tooth color change
2017
BACKGROUND Laser-assisted bleaching uses laser beam to accelerate release of free radicals within the bleaching gel to decrease time of whitening procedure. The aim of this study was to compare the efficacy of power bleaching using Opalescence Xtra Boost® and laser bleaching technique using LaserSmile gel and diode laser as an activator in their tooth whitening capacity. MATERIAL AND METHODS Student t test showed that the laser bleaching group significantly outperformed the power bleaching group in changing ∆E (p=0.977). RESULTS Similarly, while comparing the groups in changing ∆L, the laser bleaching group indicated significantly superior results (p=0.953). Statistical data from student t …
Precision electroweak measurements on the Z resonance
2005
We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, $\MZ$ and $\GZ$, and its couplings to fermions, for example the $\rho$ parameter and the effective electroweak mixing angle, are precisely measured. The number of light neutrino species is determined to be 2.9840…
Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP
2013
The ALEPH, DELPHI, L3, OPAL collaborations and LEP Electroweak Working Group.-- arXiv:1302.3415
Evaluación de la técnica quirúrgica de implantación de neuroestimulador a nivel del ganglio esfenopalatino para el tratamiento de las cefaleas crónic…
2017
- Estado actual del conocimiento El ganglio esfenopalatino (GEP), situado en la fosa pterigopalatina, es una estructura anatómica compleja que ha sido reconocida como la mayor agrupación de neuronas fuera de la cavidad craneana. No posee función sensitiva, sin embargo tiene gran relación y conexiones con múltiples ramas faciales y trigeminales, por lo que se cree que interviene en la génesis y mantenimiento de dolores faciales atípicos y cefaleas unilaterales de tipo autonómico trigeminal. El GEP contiene fibras autonómicas, tanto simpáticas como parasimpáticas. Debido a ello se ha seleccionado como estructura diana en los estudios de neuroestimulación. Existen muchas técnicas intervencioni…
Incorporating digital self-services into integrated mental health care:a physician’s perspective
2018
PurposeThis paper aims to enhance the current understanding of digital self-services (computerized cognitive behavioral therapy [cCBT]) and how they could be better incorporated into integrated mental health care from the physician’s perspective. Service marketing and information systems literature are combined in the context of mental health-care delivery.Design/methodology/approachAn online survey of 412 Finnish physicians was undertaken to understand physicians’ acceptance of cCBT. The study applies thematic analysis and structural equation modeling to answer its research questions.FindingsAdopting a service marketing perspective helps understand how digital self-services can be incorpor…
Enabling transformative value creation through online weight loss services
2020
PurposeThis study aims to understand how online weight loss services could help customers achieve a durable change. The particular focus is on exploring the roles of value co-creation and well-being outcomes in reinforcing the transformative value potential, which is argued to be realized as customers’ intentions to continue a healthier lifestyle after the service period has ended.Design/methodology/approachData was collected from the participants of an online weight loss service (n = 498), and a conceptual research model was tested using structural equation modelling.FindingsThe results imply that compliance with the guidelines and social support are two value co-creation activities that c…