Search results for "erros"
showing 10 items of 88 documents
Ethnic differences in utilization of online health information sources : A test of the social inequality hypotheses
2023
The goal of the current study was to understand ethnic differences in use of online health information sources. Social stratification and social diversification hypotheses were used as study’s theoretical framework. The data were obtained from the 2017 Israel Social Survey (N = 2166). Multinomial and logistic regression techniques were used for the multivariate analysis. The results suggest that Israeli Arab respondents were less likely than Israeli-born Jewish respondents to seek health information using the Health Funds’ call centers or websites, other websites, and to utilize any number of the online health information sources. The findings provide a strong support for the social strati…
Esineiden Internet – nykyajan ja tulevaisuuden ongelmia sekä ratkaisuja kyberturvallisuuden näkökulmasta
2017
Kyberturvallisuus on hyvin tärkeä osa nykyaikaista yhteiskuntaa, sillä suuri osa toiminnastamme, esimerkiksi monissa palveluissa asiointi, tapahtuu Internetin tai muun verkoston kautta. Esineiden Internet on seuraava askel digitaaliselle yhteiskunnalle, jossa perinteisten tietokoneiden lisäksi myös muutkin arkipäiväiset laitteet yhdistetään verkkoon. Esineiden Internet kuitenkin eroa perinteisestä Internetistä monessa mielessä, ja näin ollen sen myöskin sen turvallisuuden toteuttamisessa eivät kaikki perinteiset ratkaisut toimi samalla tavalla. Tämän tutkielman tarkoituksena on käydä läpi Esineiden Internetin kyberturvallisuuden, ja jossain määrin fyysinen turvallisuuden, tilannetta tällä h…
Kaupungistumisen vaikutukset asuntojen hintakehitykseen Suomessa
2017
Viimeisten vuosien aikana asuminen sekä työpaikat ovat keskittyneet yhä enemmän kasvukeskuksiin. Tutkielman tarkoitus on tuoda esiin kaupungistumisen näkökulma havainnoitaessa asuntojen hintojen kehittymistä. Poliittista päätöksentekoa varten on tärkeää ymmärtää asuntojen hintadynamiikkaa. Tutkimuksen alkupuolella tarkastellaan yleisesti Suomen kaupungistumista ja asuntomarkkinoita. Empiirisessä osiossa kaupungistumisen vaikutuksia asuntojen hintojen kehittymiseen analysoitiin kaikkien kerrostaloasuntojen sekä yksiöiden osalta. Vuosittainen aineisto sisälsi 23 kaupunkia ja tutkittava ajanjakso oli vuodet 1995–2014. Kaupunkien väkilukua käytettiin kaupungistumista kuvaavana muuttujana. Lisäk…
Differentiation of benign and malignant lymph nodes in pediatric patients on ferumoxytol-enhanced PET/MRI.
2019
The composition of lymph nodes in pediatric patients is different from that in adults. Most notably, normal lymph nodes in children contain less macrophages. Therefore, previously described biodistributions of iron oxide nanoparticles in benign and malignant lymph nodes of adult patients may not apply to children. The purpose of our study was to evaluate if the iron supplement ferumoxytol improves the differentiation of benign and malignant lymph nodes in pediatric cancer patients on 18F-FDG PET/MRI. Methods: We conducted a prospective clinical trial from May 2015 to December 2018 to investigate the value of ferumoxytol nanoparticles for staging of children with cancer with 18F-FDG PET/MRI.…
A study of densified biochar as carbon source in the silicon and ferrosilicon production
2019
Abstract Biochar pellets were investigated as renewable reducing agents in substitution of coal and coke in the silicon and ferrosilicon production, where a high reactivity, good mechanical properties and low feedstock costs are appreciated. The usage of pyrolysis oil as binder was investigated as way to improve the quality of the pellets. Norway spruce biochar produced at 500, 800 and 1100 °C, was pelletized blended with pyrolysis oil and lignosulphonate. A second heat treatment was carried out at the same temperatures to evaluate the interaction between biochar and pyrolysis oil and to imitate the thermal stability of the pellets when used in a furnace. Density, tensile strength and mecha…
Antiferromagnetism and p‐type conductivity of nonstoichiometric nickel oxide thin films
2020
Plasma‐enhanced atomic layer deposition was used to grow non‐stoichiometric nickel oxide thin films with low impurity content, high crystalline quality, and p‐type conductivity. Despite the non‐stoichiometry, the films retained the antiferromagnetic property of NiO.
Atomic layer deposition of Ti-Nb-O thin films onto electrospun fibers for fibrous and tubular catalyst support structures
2018
Here, the authors report on the preparation of core-shell carbon-ceramic fibrous as well as ceramic tubular catalyst supports utilizing electrospinning and atomic layer deposition (ALD). In this paper, ALD of Ti-Nb-O thin films using TiCl4, Nb(OEt)5, and H2O as precursors is demonstrated. According to the time-of-flight-elastic recoil detection analysis and Rutherford backscattering spectrometry, carbon and hydrogen impurities were relatively low, but depend on the pulsing ratio of the precursors. Optimized ALD process was used for coating of sacrificial electrospun polyvinyl alcohol (PVA) template fibers to yield tubular Ti-Nb-O structures after thermal or solution based PVA removal. Anoth…
Reaction pathways for atomic layer deposition with lithium hexamethyl disilazide, trimethyl phosphate, and oxygen plasma
2020
Atomic layer deposition (ALD) of lithium-containing films is of interest for the development of next-generation energy storage devices. Lithium hexamethyl disilazide (LiHMDS) is an established precursor to grow these types of films. The LiHMDS molecule can either be used as a single-source precursor molecule for lithium or as a dual-source precursor molecule for lithium and silicon. Single-source behavior of LiHMDS is observed in the deposition process with trimethylphosphate (TMP) resulting in the deposition of crystalline lithium phosphate (Li3PO4). In contrast, LiHMDS exhibits dual-source behavior when combined with O2 plasma, resulting in a lithium silicate. Both processes were characte…
Phosphites as precursors in atomic layer deposition thin film synthesis
2021
We here demonstrate a new route for deposition of phosphorous based materials by atomic layer deposition (ALD) using the phosphites Me3PO3 or Et3PO3 as precursors. These contain phosphorous in the oxidation state (III) and are open for deposition of reduced phases by ALD. We have investigated their applicability for the synthesis of LiPO and AlPO materials and characterized their growth by means of in situ quartz crystal microbalance. Phosphites are good alternatives to the established phosphate-based synthesis routes as they have high vapor pressure and are compatible with water as a coreactant during deposition. The deposited materials have been characterized using XPS, x-ray fluorescence…
Structural and chemical analysis of annealed plasma-enhanced atomic layer deposition aluminum nitride films
2016
Plasma-enhanced atomic layer deposition was utilized to grow aluminum nitride (AlN) films on Si from trimethylaluminum and N2:H2 plasma at 200 °C. Thermal treatments were then applied on the films which caused changes in their chemical composition and nanostructure. These changes were observed to manifest in the refractive indices and densities of the films. The AlN films were identified to contain light element impurities, namely, H, C, and excess N due to nonideal precursor reactions. Oxygen contamination was also identified in the films. Many of the embedded impurities became volatile in the elevated annealing temperatures. Most notably, high amounts of H were observed to desorb from the…