scholarly journals Eel migration to the Sargasso: remarkably high swimming efficiency and low energy costs

2005 ◽  
Vol 208 (7) ◽  
pp. 1329-1335 ◽  
Author(s):  
V. van Ginneken
Keyword(s):  
Low Energy ◽  
Energy Costs ◽  
Swimming Efficiency

Structure and properties of powders obtained by electrodispersion of corrosion-resistant metal waste in kerosine

2021 ◽  
pp. 276-281
Author(s):  
E.V. Ageeva ◽  
E.V. Ageev ◽  
A.A. Sysoev
Keyword(s):  
High Efficiency ◽  
Experimental Studies ◽  
Low Energy ◽  
Powder Materials ◽  
Energy Costs ◽  
Structure And Properties ◽  
Corrosion Resistant ◽  
High Chromium ◽  
Metal Waste ◽  
Industrial Use

The results of experimental studies of the structure and properties of electroerosive high-chromium powders obtained in kerosene are presented. The high efficiency of using the electrodispersing technology is shown, which provides for obtaining new corrosion-resistant powder materials suitable for industrial use at low energy costs.

scholarly journals Conversion of a microwave synthesized alkali-metal MOF to a carbonaceous anode for Li-ion batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (23) ◽  
pp. 13732-13736
Author(s):  
Aamod V. Desai ◽  
Vanessa Pimenta ◽  
Cara King ◽  
David B. Cordes ◽  
Alexandra M. Z. Slawin ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Low Energy ◽  
Rechargeable Battery ◽  
Microwave Assisted Synthesis ◽  
Energy Costs ◽  
Li Ion Batteries ◽  
Microwave Assisted ◽  
Li Ion

An alkali-metal MOF is prepared using microwave-assisted synthesis, which is converted into a carbonaceous solid at low energy costs. The MOF-derived solid functions as a promising anode for Li-ion rechargeable battery (LIB).

scholarly journals Swimming mediated by ciliary beating: comparison with a squirmer model

2019 ◽  
Vol 874 ◽  
pp. 774-796 ◽  
Author(s):  
Hiroaki Ito ◽  
Toshihiro Omori ◽  
Takuji Ishikawa
Keyword(s):  
Cell Body ◽  
Hydrodynamic Interactions ◽  
Swimming Velocity ◽  
Energy Costs ◽  
Theoretical Studies ◽  
Free Swimming ◽  
Ciliary Beating ◽  
Aspect Ratios ◽  
Swimming Efficiency ◽  
Micro Organisms

The squirmer model of Lighthill and Blake has been widely used to analyse swimming ciliates. However, real ciliates are covered by hair-like organelles, called cilia; the differences between the squirmer model and real ciliates remain unclear. Here, we developed a ciliate model incorporating the distinct ciliary apparatus, and analysed motion using a boundary element–slender-body coupling method. This methodology allows us to accurately calculate hydrodynamic interactions between cilia and the cell body under free-swimming conditions. Results showed that an antiplectic metachronal wave was optimal in the swimming speed with various cell-body aspect ratios, which is consistent with former theoretical studies. Exploiting oblique wave propagation, we reproduced a helical trajectory, like Paramecium, although the cell body was spherical. We confirmed that the swimming velocity of model ciliates was well represented by the squirmer model. However, squirmer modelling outside the envelope failed to estimate the energy costs of swimming; over 90 % of energy was dissipated inside the ciliary envelope. The optimal swimming efficiency was given by the antiplectic wave; the value was 6.7 times larger than in-phase beating. Our findings provide a fundamental basis for modelling swimming micro-organisms.

DEVELOPMENT OF TECHNOLOGY FOR ELECTROEROSIVE COPPER NANOPARTICLES FROM WASTE

2016 ◽  
Vol 3 (1) ◽  
pp. 520-524
Author(s):  
Маховицкий ◽  
E. Makhovitskiy ◽  
Агеев ◽  
E. Ageev ◽  
Хорьякова ◽  
...  
Keyword(s):  
Experimental Research ◽  
Copper Nanoparticles ◽  
Copper Wire ◽  
Low Energy ◽  
Energy Costs ◽  
Conductive Material ◽  
Technology Of Production ◽  
Electroerosion Dispersion

One of the most promising methods of processing of practically any conductive material, characterized by relatively low energy costs and environmental cleanliness of the process, is the method of electroerosion dispersion. However, to obtain the electro erosion dispersing of nanoparticles it is necessary to conduct a comprehensive theoretical and experimental research. The article describes the technology of production electroerosion copper nanoparticles from the waste electrical copper wire.

scholarly journals Impacto de LoRaWAN no Desempenho de Plataformas de IoT baseadas em Nuvem e Névoa Computacional

2019 ◽  
Author(s):  
Ivan Zyrianoff ◽  
Alexandre Heideker ◽  
Dener Ottolini Silva ◽  
João Henrique Kleinschmidt ◽  
Carlos Alberto Kamienski
Keyword(s):  
Performance Evaluation ◽  
System Performance ◽  
New Technology ◽  
Fog Computing ◽  
Data Communication ◽  
Evaluation Study ◽  
Low Energy ◽  
Energy Costs ◽  
Computational Aspects ◽  
Iot Platforms

LoRaWAN is a new technology that has been consolidating as a key data communication component to send data in IoT-based systems, due to its ability to send data over long distances with low energy costs. However, literature considers only wireless aspects, disregarding its computational aspects and its integration with IoT platforms, as well as ignoring the deployment possibilities that involve cloud and fog computing. In order to understand the computational impacts of the LoRa architecture we performed a careful performance evaluation study in a complex IoT scenario, exploring cloud and fog computing scenarios and integrating with the IoT FIWARE platform. The results show that the LoRaWAN architecture is scalable, but it has impacts on system performance.

scholarly journals STRUCTURE AND PROPERTIES OF POWDER MATERIALS OBTAINED BY ELECTRODISPERSION OF NICHROME METAL WASTE

2021 ◽  
pp. 27-31
Author(s):  
E. V. Ageeva ◽  
A. Y. Altukhov ◽  
A. V. Shcherbakov
Keyword(s):  
High Efficiency ◽  
Experimental Studies ◽  
Low Energy ◽  
Powder Materials ◽  
Energy Costs ◽  
Distilled Water ◽  
Structure And Properties ◽  
Metal Waste ◽  
Industrial Use

The results of experimental studies aimed at studying the structure and properties of electroerosive nichrome powders obtained in distilled water are presented. The high efficiency of the application of the electrodispersion technology, which provides, at low energy costs, the production of new nichrome powder materials suitable for industrial use, is shown.

LED lights increase bioactive substances at low energy costs in culturing fruiting bodies of Cordyceps militaris

2014 ◽  
Vol 175 ◽  
pp. 139-143 ◽  
Author(s):  
Zhi-Li Yi ◽  
Wen-Fang Huang ◽  
Yan Ren ◽  
Eugen Onac ◽  
Guo-Fu Zhou ◽  
...  
Keyword(s):  
Cordyceps Militaris ◽  
Low Energy ◽  
Energy Costs ◽  
Fruiting Bodies ◽  
Bioactive Substances ◽  
Led Lights

FEMALE RESISTANCE AND MATING OUTCOMES IN A STREAM-DWELLING ISOPOD: EFFECTS OF MALE ENERGY RESERVES AND MATING HISTORY

Behaviour ◽  
2002 ◽  
Vol 139 (7) ◽  
pp. 875-895 ◽  
Author(s):  
Tyler Orsburn ◽  
Timothy Sparkes ◽  
Daniel Keogh
Keyword(s):  
Fertilization Success ◽  
Low Energy ◽  
Male Mating ◽  
Energy Costs ◽  
Energy Reserves ◽  
Female Resistance ◽  
Mating History ◽  
Race Track ◽  
Males And Females ◽  
The Relationship

AbstractIn the stream-dwelling isopod, Lirceus fontinalis, conspicuous mating contests occur between males and females prior to pair formation. Our previous work has shown that female resistance during contests determines contest outcomes. Here we examined whether female resistance could act as a mechanism of choice in which females discriminate against males with low energy (glycogen) reserves. We manipulated male glycogen levels by chasing males around a race-track then exposed females to males that differed in glycogen levels. We found that high-glycogen males were more successful than low-glycogen males and that this effect appeared to be due to increased female resistance towards low-glycogen males. We then examined one potential benefit to females of energy-based mate discrimination. In L. fontinalis, male mating history and levels of glycogen reserves are correlated, i.e. recently mated males are glycogen-depleted due to energy costs associated with mating. We examined whether recently mated males were also costly mates, and thus should be avoided by females. We quantified the relationship between male mating history and female fertilization success and found that females suffered an 18% reduction in fertilization success by mating with a male that had recently inseminated another female. We propose that female resistance could act as a mechanism of choice in which males with low energy reserves are avoided and that one benefit of this discrimination is that females increase fertilization success be avoiding males that have recently mated.

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