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showing 10 items of 9566 documents
The Effect of Electrolytic Solution Composition on the Structure, Corrosion, and Wear Resistance of PEO Coatings on AZ31 Magnesium Alloy
2020
Plasma electrolytic oxidation coatings were prepared in aluminate, phosphate, and silicate-based electrolytic solutions using a soft-sparking regime in a multi-frequency stepped process to compare the structure, corrosion, and wear characteristics of the obtained coatings on AZ31 magnesium alloy. The XRD results indicated that all coatings consist of MgO and MgF2, while specific products such as Mg2SiO4, MgSiO3, Mg2P2O7, and MgAl2O4 were also present in specimens based on the selected solution. Surface morphology of the obtained coatings was strongly affected by the electrolyte composition. Aluminate-containing coating showed volcano-like, nodular particles and craters distributed over the …
Synergistic effect of W incorporation and pulsed current mode on wear and tribocorrosion resistance of coatings grown by plasma electrolytic oxidatio…
2019
Ceramic coatings were grown by plasma electrolytic oxidation on 7075 Al alloy using unipolar and bipolar pulsed current waveforms with 20 and 40% cathodic duty cycles, from a silicate-based bath without and with the addition of Na2WO4. Pancake-like morphology was dominant on the coatings grown by unipolar waveform, while the bipolar waveforms promoted volcano-like morphology, increased the roughness of the coating surface and the formation of more compact layers. The coatings produced using the bipolar waveforms provided higher resistances toward both tribocorrosion and dry sliding conditions, while further improvement was achieved by the presence of tungsten. The coatings produced in tungs…
High Entropy Alloys for Energy Conversion and Storage: A Review of Grain Boundary Wetting Phenomena
2022
This research was funded by the Russian Ministry of Science and Higher Education (contract no. 075-15-2021-945 grant no. 13.2251.21.0013). Support from the University of the Basque Country (project GIU19/019) and from the Basque Government (project IT1714-22) is also acknowledged.
Energy Efficient Optimization for Wireless Virtualized Small Cell Networks With Large-Scale Multiple Antenna
2017
Wireless network virtualization is envisioned as a promising framework to provide efficient and customized services for next-generation wireless networks. In wireless virtualized networks (WVNs), limited radio resources are shared among different services providers for providing services to different users with heterogeneous demands. In this paper, we propose a resource allocation scheme for an orthogonal frequency division multiplexing-based WVN, where one small cell base station equipped with a large number of antennas serves the users with different service requirements. In particular, with the objective to obtain the energy efficiency in the uplink, a joint power, subcarrier, and antenn…
Vuorovaikutus sairaalajohtoryhmien kokouksissa
2018
Kokoukset lienevät yleisin työelämän vuorovaikutuskäytänne ja siten organisoinnin keskeinen areena. Kokouksista on kirjoitettu lähinnä opaskirjallisuutta ja kokouksiin keskittyvä tutkimus on lisääntynyt vasta viime vuosina. Kokousteoreettinen jäsennys on kuitenkin edelleen vähäistä. Organisaation konstituointi tapahtuu vuorovaikutusprosesseissa. Tässä tutkimuksessa tarkastellaan sairaalajohtoryhmien kokousvuorovaikutusta. Johtoryhmäkokoukset ovat merkittävä osa sairaaloiden tiedonjakamis- ja johtamisjärjestelmiä, mutta sairaalaorganisaatioissa kokouksia on tutkittu vain vähän. Tämän väitöstutkimuksen tavoitteena on kuvata vuorovaikutusta ja jäsentää sen rakenteita sairaalajohtoryhmäkokouksi…
Managing the gap – policy and practice of parents in child care and education
2017
Always in crisis, always a solution? : The Nordic model as a political and scholarly concept
2021
While campaigning for the 2016 US Democratic Party presidential nomination, Senator Bernie Sanders invoked the Nordic countries as a model for future politics. In a debate, he declared, ‘I think we should look to countries like Denmark, like Sweden and Norway, and learn from what they have accomplished for their working people.’1 Hailing the Nordic countries, especially Denmark, as an example of ‘democratic socialism’,2 Sanders’s vision engendered a heated debate, with political opponents critiquing the implied political agenda, the prime minister of Denmark protesting the idea of Denmark as a socialist country, and journalists and pundits presenting corrective views of the economic and soc…
Smooth sailing toward more peaceful societies? Long-run Nordic development paths
2022
Publisher Copyright: © 2022 selection and editorial matter, Christopher Lloyd and Matti Hannikainen. In this chapter, the authors aim to compare the Nordic societies in a broad fashion in the last 200 years in their process of “sailing” (with the implication of rough waters along the way) from social fragmentation to more inclusive welfare societies. The authors’ main goal is to examine the coevolution of economic, political, and fiscal factors among the Nordic societies in the long run by making use of recent longitudinal data sets. In this way, they can map out some key patterns that characterized the shift toward more peaceful and well-functioning societies. First, the authors focus on t…
The Nordic Economic, Social and Political Model : Challenges in the 21st Century
2021
The Nordic Model is the 20th-century Scandinavian recipe for combining stable democracies, individual freedom, economic growth and comprehensive systems for social security. But what happens when Sweden and Finland – two countries topping global indexes for competitiveness, productivity, growth, quality of life, prosperity, and equality – start doubting themselves and their future? Is the Nordic Model at a crossroads? Historically, consensus, continuity, social cohesion, and broad social trust have been hailed as key components for the success and for the self-images of Sweden and Finland. In the contemporary, however, political debates in both countries are increasingly focused on risks, t…