Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Vitalii Boiko"'
Autor:
Giovanni Russo, Francesco Armetta, Tingke Rao, Wangchao Yuan, Vitalii Boiko, Dariusz Hreniak, Cristina Giordano, Maria Luisa Saladino
Publikováno v:
Molecules, Vol 29, Iss 19, p 4605 (2024)
In this work, two different composite nanostructures, YAG:Ce and Ga0.9In0.1N, were prepared by the Urea Glass Route method and tested for the production of white light. The first composite was prepared by synthetizing the Ga0.9In0.1N nanoparticles in
Externí odkaz:
https://doaj.org/article/e64655e22ff248159c2f635e809af2fa
Autor:
Yaraslau Padrez, Vitalii Boiko, Juraj Kajan, Tomáš Gregor, Vira Tinkova, Renata Karpicz, Mykhailo Chaika
Publikováno v:
Optical Materials: X, Vol 22, Iss , Pp 100315- (2024)
Charge Transfer Luminescence (CTL) processes play a major roles in Yb:YAG laser materials act as a source of energy losses decrease the performance of this material. In this work, the temperature dependence of CTL in Yb:YAG single crystal was investi
Externí odkaz:
https://doaj.org/article/d6c8445ad92c48c582c4352de56a0924
Publikováno v:
Фінансово-кредитна діяльність: проблеми теорії та практики, Vol 5, Iss 52 (2023)
In the article, international cooperation of territorial communities of Ukraine is defined as a strategic direction to attract financial resources and implement their investment projects. The authors name prerequisites for completing the reform of de
Externí odkaz:
https://doaj.org/article/531549c1ad5c4364a9500d1dd1598a5f
Publikováno v:
Comparative Economic Research, Vol 24, Iss 1, Pp 65-84 (2021)
Based on the multiple regression model and scenario approach to forecasting, the article estimates the Ukrainian migration aspirations towards Germany (the scale of migration, the economic activity of migrants, and their economic benefits). It is arg
Externí odkaz:
https://doaj.org/article/559b7041b6c2466e848fd434a3e7111e
Autor:
Vitalii Boiko, Zhengfa Dai, Marta Markowska, Cristina Leonelli, Cecilia Mortalò, Francesco Armetta, Federica Ursi, Giorgio Nasillo, Maria Luisa Saladino, Dariusz Hreniak
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
Abstract Co-doped Ce3+, Cr3+ and Pr3+ yttrium–aluminium–gallium garnet powders of various sizes were obtained by co-precipitation method. The microstructure and morphology were investigated by XRPD, TEM and gas porosimetry. The luminescence prope
Externí odkaz:
https://doaj.org/article/e8cdcd40f93646c78f58c83a81f4a319
Autor:
Vitalii Boiko, Zhengfa Dai, Mykhailo Chaika, Karina Grzeszkiewicz, Jiang Li, Wieslaw Strek, Dariusz Hreniak
Publikováno v:
Materials, Vol 15, Iss 13, p 4407 (2022)
In the current work, YAGG:Cr3+ nanophosphors were synthesized by the Pechini method and then annealed at different temperatures in the range 800–1300 °C. The structure and morphology of the samples were characterized by X-ray Powder Diffraction (X
Externí odkaz:
https://doaj.org/article/16a97b5b835246d4a33e807a23c2ab5d
Publikováno v:
Materials, Vol 15, Iss 7, p 2606 (2022)
The gadolinium, gallium, aluminum garnet doped with cerium and co-doped with dysprosium ions were prepared using sol gel method. The SEM images show that after synthesis, the grains are below 100 nm. The powders were ultrasonically mixed with graphen
Externí odkaz:
https://doaj.org/article/bd7c170444924308b408364b520a4ed4
Autor:
Taras Vasyltsiv, Vitalii Boiko
Publikováno v:
Стратегічна панорама, Iss 2, Pp 132-138 (2018)
The growth of the world population and the aggravation of the food shortage substantiate the feasibility of implementing effective measures to strengthen food security. Ukraine’s food security challenges are aggravated in the implementation of the
Externí odkaz:
https://doaj.org/article/f987fbb3cdaa42bc85e618c45e3ce9d0
Publikováno v:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego, Vol 17, Iss 4 (2017)
In 1996 and 2016, respectively, the Independent Creative Group (ICG) conducted a comprehensive sociological study "Economic reform - the eye of the village." The aim of the project was to explore the evaluation of economic reform of rural populations
Externí odkaz:
https://doaj.org/article/f9b86583fb0242af918f1df4201302b3
Autor:
Qiang Liu, Wenli Wang, Zhengfa Dai, Vitalii Boiko, Haohong Chen, Xin Liu, Danyang Zhu, Jian Xu, Dariusz Hreniak, Jiang Li
Publikováno v:
Journal of Rare Earths. 40:1699-1705
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::397f068482ffc32f71a2342844620a81
https://doi.org/10.1016/j.jre.2022.01.017
https://doi.org/10.1016/j.jre.2022.01.017