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Zacharoula Kalogiratou and Theodoros Monovasilis
Two-Derivative Runge?Kutta methods have been proposed by Chan and Tsai in 2010 and order conditions up to the fifth order are given. In this work, for the first time, we derive order conditions for order six. Simplifying assumptions that reduce the numbe...
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Vladimir G. Povarov, Ignaty Efimov, Ksenia I. Smyshlyaeva and Viacheslav A. Rudko
Since 2020, 0.5% limits on the sulfur content of marine fuels have been in effect worldwide. One way to achieve this value is to mix the residual sulfur and distillate low sulfur components. The main problem with this method is the possibility of sedimen...
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Jan van Schyndel, Elke Goos, Clemens Naumann, Justin S. Hardi and Michael Oschwald
Methane (CH4) is a promising rocket fuel for various future space mission scenarios. It has advantages in terms of cost, performance, and environmental friendliness. Currently, there is no clear definition on standards and specifications for liquefied me...
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Paulinus Chijioke Okwelle,Offia Tugwell Owo,Chima Christain Ibekwe
Pág. 94 - 104
The study was carried out to assess the skills required by polytechnic graduates for employment in the oil and gas industry in Nigeria's Niger-Delta region. A descriptive survey was used for the study, whose population comprised 1404 oil and gas in...
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Ksenia I. Smyshlyaeva, Viacheslav A. Rudko, Vladimir G. Povarov, Alina A. Shaidulina, Ignaty Efimov, Renat R. Gabdulkhakov, Igor N. Pyagay and James G. Speight
The effects of asphaltenes from two heavy oil residues on the sedimentation stability of residual marine fuels were assessed and compared. As base components of residual marine fuels, the vacuum residue (VacRes) and visbreaking residue (VisRes) were take...
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Ángel Bacelis, Lucien Veleva, Sebastián Feliu, Jr., Marina Cabrini and Sergio Lorenzi
This study compares corrosion activities of carbon steel B450C and SS 430 (Mn in low content) exposed for 30 days in cement extract solution. Iron oxide and hydroxide were formed as corrosion products, in addition to CaCO3, in the presence of Cr2O3 on SS...
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Yaojung Shiao, Thang Hoang and Po-Yao Chang
Exercise is good for health, quality of life, and maintenance of human muscles. Dumbbells are popular indoor exercise equipment with several benefits such as low cost, high flexibility in space and time, easy operation, and suitability for people of all ...
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Hryhorii Ilchuk,Andrii Kashuba,Ivan Kuno,Sergey Sveleba,Taras Malyi,Roman Petrus,Volodymyr Tsiumra,Ihor Semkiv
Pág. 24 - 30
Monocrystals (N(CH3)4)2MnCl4 were grown from an aqueous solution of salts by slow evaporation at room temperature. The effect of phase transitions on the behavior of photoluminescence spectra, as well as excitation spectra and time of attenuation of the ...
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Alexander Landa, Per Söderlind, Emily E. Moore and Aurelien Perron
YCo5 permanent magnet exhibits high uniaxial magnetocrystalline anisotropy energy and has a high Curie temperature. These are good properties for a permanent magnet, but YCo5 has a low energy product, which is notably insufficient for a permanent magnet....
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Tingyang Gu, Minyan Lu, Luyi Li and Qiuying Li
Current research on software vulnerability analysis mostly focus on source codes or executable programs. But these methods can only be applied after software is completely developed when source codes are available. This may lead to high costs and tremend...
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