Search results for "Kite"

Kun äiti käyttää väkivaltaa : lastensuojelun sosiaalityöntekijöiden näkemyksiä

2014

Tämän tutkimuksen tavoitteena on tarkastella äitien lapsiinsa kohdistamaa väkivaltaa ilmiönä. Tutkimusaineiston olen kerännyt haastattelemalla kahdessa eri kaupungissa työskenteleviä kuutta lastensuojelun sosiaalityöntekijää. Tutkielmastani valmistui ensin työn teoreettinen viitekehys, jonka jälkeen toteutin haastatteluaineiston keräämisen. Haastatteluiden tuottaman tiedon avulla yritän vastata alla oleviin asettamiini tutkimusongelmiini. Kuinka usein ja millaisena ilmiönä naisten lapsiinsa kohdistama väkivalta näkyy lastensuojelussa? Määrittyykö ilmiö yhteiskunnassa sosiaaliseksi ongelmaksi? Millaisia seurauksia väkivallasta nähdään olevan? Millaista apua naiset ja lapset tarvitsevat? Mite…

Doping induced stable room temperature dual emission from gadolinium doped vacancy ordered double halide perovskite, Gd:Cs2SnCl6

2022

The recent advancement in bandgap engineering through controlled doping has widen the prospectof vacancy ordered double halide perovskites (VO DHPs) by conferring them with designableoptoelectronic properties. Here, we report synthesis of Gd doped Cs2SnCl6 via a simplesolvothermal method. Gd3+ ions doping lowers the band gap from 3.8 eV to 2.8 eV and facilitatesstable room temperature dual PL emission centered at 440 nm and 610 nm. The macroscopicemission process is well supported by the confocal PL emission studies on isolated crystallites.Both the pristine (Cs2SnCl6) and Gd:Cs2SnCl6 exhibit crystalline cubic structure with Fm3m spacegroup. Rietveld refinement correlates well with the cubi…

Preparation and characterisation of optical and optoelectronic devices based in two-dimensional semiconductors

2020

In the Materials Science field, two-dimensional materials have gained the scientific community attention in recent years. The change and the appearance of novel properties when their thickness is reduced to nanometric scale has special interest for its fundamental properties study for, from this base, the design and its implementation in devices. The wide variety of materials with the possibility of being exfoliated at the two-dimensional level opens the field to different applications, from optoelectronic devices, detection and sensing, energy storage, catalysis, medical applications and quantum information technologies, among others. This thesis gathers results in both directions: a funda…

Physical activity during pregnancy and early childhood from the perspective of gestational diabetes risk and children's body composition

2017

This study investigated the factors associated with self-reported leisure-time physical activity excluding household activities (LTPAexHH) among women at risk for gestational diabetes (GDM), change in self-reported LTPA including household activities (LTPAinHH) from pre-pregnancy to 7-year follow-up as well as the influence of risk for GDM on their children’s physical activity (PA) and body composition. The association between maternal and child PA, and associations of PA with body composition and physical fitness in preschoolers were also studied. A sample of 399 pregnant women at risk for GDM was examined in a cohort study, and 199 mother-child dyads were assessed in cross-sectional and l…

Adiposity-Related Predictors of Vascular Aging From a Life Course Perspective : Findings From the Helsinki Birth Cohort Study

2022

Brookite, the least known TiO2 photocatalyst, Catalysts

2013

Brookite is the least studied TiO2 photocatalyst due to the difficulties usually encountered in order to obtain it as a pure phase. In this review, a comprehensive survey of the different methods available for preparing brookite powders and films is reported. Attention has been paid both to the most traditional methods, such as hydrothermal processes at high temperatures and pressures, and to environmentally benign syntheses using water soluble compounds and water as the solvent. Papers reporting the photocatalytic activity of pure and brookite-based samples have been reviewed.

Applying Genre-Based Ontologies to Enterprise Architecture

2007

This paper elaborates the approach of using ontologies as a conceptual base for enterprise architecture (EA) descriptions. The method focuses on recognising and modelling business critical information concepts, their content, and semantics used to operate the business. Communication genres and open and semi-structured information need interviews are used as a domain analysis method. Ontologies aim to explicate the results of domain analysis and to provide a common reference model for Business Information Architecture (BIA) descriptions. The results are generalised to model further aspects of EA. peerReviewed

Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance

2020

Nanocrystals surface chemistry engineering offers a direct approach to tune charge carrier dynamics in nanocrystals-based photodetectors. For this purpose, we have investigated the effects of altering the surface chemistry of thin films of CsPbBr3 perovskite nanocrystals produced by the doctor blading technique, via solid state ligand-exchange using 3-mercaptopropionic acid (MPA). The electrical and electro-optical properties of photovoltaic and photoconductor devices were improved after the MPA ligand exchange, mainly because of a mobility increase up to 5 &times

Cardiorespiratory Fitness Estimation Based on Heart Rate and Body Acceleration in Adults With Cardiovascular Risk Factors : Validation Study

2022

Publisher Copyright: © Antti-Pekka E Rissanen, Mirva Rottensteiner, Urho M Kujala, Jari L O Kurkela, Jan Wikgren, Jari A Laukkanen. Originally published in JMIR Cardio (https://cardio.jmir.org), 25.10.2022. This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Cardio, is properly cited. The complete bibliographic information, a link to the original publication on https://cardio.jmir.org, as well as this copyright and license information must be included. Background: C…

Associations of physical activity and physical fitness with cardiovascular risk factors in young men

2015

Artikkeliväitöskirja. Sisältää yhteenveto-osan ja neljä artikkelia. Article dissertation. Contains an introduction part and four articles.