Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-3-17-22
A. Zisman, N. Ermakova
The conventional gradient and related differential operators have been uniquely extended to a cluster of nodal points. Based on general algebraic grounds, such extensions are applicable to any discrete pattern while avoiding artificial shape functions or tessellations. Thus, various constitutive equations can be represented in a discrete form that enables the numerical modeling immediately in terms of nodal variables. Accuracy of this approach should ameliorate by the reduction of nodal spacing with the increasing computational power.
{"title":"Discrete Differential Operators Immediately Applicable to Numerical Models of Solid Mechanics","authors":"A. Zisman, N. Ermakova","doi":"10.17586/2687-0568-2022-4-3-17-22","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-3-17-22","url":null,"abstract":"The conventional gradient and related differential operators have been uniquely extended to a cluster of nodal points. Based on general algebraic grounds, such extensions are applicable to any discrete pattern while avoiding artificial shape functions or tessellations. Thus, various constitutive equations can be represented in a discrete form that enables the numerical modeling immediately in terms of nodal variables. Accuracy of this approach should ameliorate by the reduction of nodal spacing with the increasing computational power.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114396573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-4-1-16
S. Rochas, Y. Kovach, P. E. Kopytov, A. Kremleva, A. Egorov
Vertical-cavity surface-emitting lasers (VCSELs) are wide-spread laser sources for different applications in optical communication and sensing. The evolution of fabrication processes and new technological approaches allow to obtain high-Q single-mode VCSELs with data rates more than 100 Gbps. This review discusses basic designs and construction features of VCSELs that effect on their applications. The advances over the past 20 years for single-mode VCSELs of 850 nm, 1300 nm and 1550 nm wavelength ranges are presented.
{"title":"Review on Single-Mode Vertical-Cavity Surface-Emitting Lasers for High-Speed Data Transfer","authors":"S. Rochas, Y. Kovach, P. E. Kopytov, A. Kremleva, A. Egorov","doi":"10.17586/2687-0568-2022-4-4-1-16","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-4-1-16","url":null,"abstract":"Vertical-cavity surface-emitting lasers (VCSELs) are wide-spread laser sources for different applications in optical communication and sensing. The evolution of fabrication processes and new technological approaches allow to obtain high-Q single-mode VCSELs with data rates more than 100 Gbps. This review discusses basic designs and construction features of VCSELs that effect on their applications. The advances over the past 20 years for single-mode VCSELs of 850 nm, 1300 nm and 1550 nm wavelength ranges are presented.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124214967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-4-62-66
D. Shiryaev, K.R. Razzhivina, I. S. Polukhin, V. Bougrov
A brief review is devoted to an evolving technology of visible light communication. The information volume transferred between users is increasing and visible light communication is becoming the option for organizing information transfer channel due to the license free broadcasting frequency range, high communication channel capacity, high noise-immunity, and high-level communication channel security. The paper presents various data transfer systems based on white phosphor LEDs and RGB LEDs by various modulation and signal processing schemes to increase the data rate.
{"title":"Visible Light Communication: a Brief Review","authors":"D. Shiryaev, K.R. Razzhivina, I. S. Polukhin, V. Bougrov","doi":"10.17586/2687-0568-2022-4-4-62-66","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-4-62-66","url":null,"abstract":"A brief review is devoted to an evolving technology of visible light communication. The information volume transferred between users is increasing and visible light communication is becoming the option for organizing information transfer channel due to the license free broadcasting frequency range, high communication channel capacity, high noise-immunity, and high-level communication channel security. The paper presents various data transfer systems based on white phosphor LEDs and RGB LEDs by various modulation and signal processing schemes to increase the data rate.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132676600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-3-35-41
S. Lipnitskaya, I.I. Dudko, I. Smirnova
In this paper, light extraction from remote phosphor LEDs were calculated in Zemax OpticStudio. The dependence of the optical characteristics of the remote phosphor LED on the parameters of phosphor and its geometrical form was considered. In case of a thin plate as a remote phosphor, phosphor particle size, phosphor mass fraction and phosphor plate thickness were carefully analyzed. Furthermore, a plane-convex lens and Fresnel lens were also considered as geometrical form of remote phosphor. The simulation results show that color coordinates of LED, using remote phosphor plate (thickness 0.25 mm, mass fraction 30% and particle size 3 μm of phosphor), are the closest to D65 point on color space compared to other considered LEDs. The use of plane-convex lens (thickness 1 mm, radius of curvature 7 mm, base diameter 7 mm) as remote phosphor results in the maximum luminous flux compared to other forms.
{"title":"Numerical Simulation of Light Extraction from Remote Phosphor LED","authors":"S. Lipnitskaya, I.I. Dudko, I. Smirnova","doi":"10.17586/2687-0568-2022-4-3-35-41","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-3-35-41","url":null,"abstract":"In this paper, light extraction from remote phosphor LEDs were calculated in Zemax OpticStudio. The dependence of the optical characteristics of the remote phosphor LED on the parameters of phosphor and its geometrical form was considered. In case of a thin plate as a remote phosphor, phosphor particle size, phosphor mass fraction and phosphor plate thickness were carefully analyzed. Furthermore, a plane-convex lens and Fresnel lens were also considered as geometrical form of remote phosphor. The simulation results show that color coordinates of LED, using remote phosphor plate (thickness 0.25 mm, mass fraction 30% and particle size 3 μm of phosphor), are the closest to D65 point on color space compared to other considered LEDs. The use of plane-convex lens (thickness 1 mm, radius of curvature 7 mm, base diameter 7 mm) as remote phosphor results in the maximum luminous flux compared to other forms.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129979931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2023-5-2-56-76
N. Chirkunova, N. Islavath, M. Dorogov
Our research is mainly focused on solving problems related to the production of hydrogen and its storage, as well as the creation of autonomous energy systems using renewable energy sources. Technological solutions for green energy depend on the development of new materials with desired properties that are able to reversibly accumulate hydrogen under appropriate environmental conditions (temperature, pressure) and on the technological processes allowing to obtain molecular hydrogen without significant energy consumption. The creation of materials with fundamentally new characteristics is inextricably linked with the production of nanoscale systems with properties that are controlled at the atomic and molecular level. The review considers the results of studies on the possibilities of using various nanostructures of titanium dioxide known for its catalytic properties and high stability in various applications of hydrogen energy. Much attention is paid to the promising direction of solid-state storage of hydrogen using hydride pastes and high-entropy alloys.
{"title":"Titanium Dioxide for Hydrogen Economy: a Brief Review","authors":"N. Chirkunova, N. Islavath, M. Dorogov","doi":"10.17586/2687-0568-2023-5-2-56-76","DOIUrl":"https://doi.org/10.17586/2687-0568-2023-5-2-56-76","url":null,"abstract":"Our research is mainly focused on solving problems related to the production of hydrogen and its storage, as well as the creation of autonomous energy systems using renewable energy sources. Technological solutions for green energy depend on the development of new materials with desired properties that are able to reversibly accumulate hydrogen under appropriate environmental conditions (temperature, pressure) and on the technological processes allowing to obtain molecular hydrogen without significant energy consumption. The creation of materials with fundamentally new characteristics is inextricably linked with the production of nanoscale systems with properties that are controlled at the atomic and molecular level. The review considers the results of studies on the possibilities of using various nanostructures of titanium dioxide known for its catalytic properties and high stability in various applications of hydrogen energy. Much attention is paid to the promising direction of solid-state storage of hydrogen using hydride pastes and high-entropy alloys.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133348515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-3-42-46
S. A. Vostrikova, D. Shiryaev, I. Smirnova, V. Bougrov, E. Kondratieva
Continuous monitoring of patient’s state in intensive care units is crucial for displaying critical conditions and identifying signs of clear consciousness. Traditional monitoring on a bedside monitor represents digital value on the screen and has several shortcomings. The observer’s perception of digital information is limited by visual acuity and affects the speed of decision-making. The radio frequency range is increasingly overloaded with the development of Internet of Things devices. It leads to numerous errors in the transmitted data. The developed system is aimed at the comprehensive elimination of the shortcomings through available means. An understandable visualization system is preferred for prompt recognition of changes in the patient’s state, increasing the speed of perception of the observer, and receiving information in the form of a data set. A data transmission system via optical wireless communication is relevant for duplicative channel for displaying and eliminating the shortcomings of systems operating in the radio frequency range. The system being developed is universal and can be used in a wide range of professional fields. In particular, if the use of the radio frequency range is limited and the stability of the data transmission channel to electromagnetic interference is essential.
{"title":"A System for Visual Display of Changes in the Physiological State of Patients with Chronic Disorders Using Data Transmission via Optical Wireless Communication","authors":"S. A. Vostrikova, D. Shiryaev, I. Smirnova, V. Bougrov, E. Kondratieva","doi":"10.17586/2687-0568-2022-4-3-42-46","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-3-42-46","url":null,"abstract":"Continuous monitoring of patient’s state in intensive care units is crucial for displaying critical conditions and identifying signs of clear consciousness. Traditional monitoring on a bedside monitor represents digital value on the screen and has several shortcomings. The observer’s perception of digital information is limited by visual acuity and affects the speed of decision-making. The radio frequency range is increasingly overloaded with the development of Internet of Things devices. It leads to numerous errors in the transmitted data. The developed system is aimed at the comprehensive elimination of the shortcomings through available means. An understandable visualization system is preferred for prompt recognition of changes in the patient’s state, increasing the speed of perception of the observer, and receiving information in the form of a data set. A data transmission system via optical wireless communication is relevant for duplicative channel for displaying and eliminating the shortcomings of systems operating in the radio frequency range. The system being developed is universal and can be used in a wide range of professional fields. In particular, if the use of the radio frequency range is limited and the stability of the data transmission channel to electromagnetic interference is essential.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132084840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2020-2-4-1-8
A. Sheinerman
{"title":"Plastic Deformation of Metal/Graphene Composites with Bimodal Grain Size Distribution: a Brief Review","authors":"A. Sheinerman","doi":"10.17586/2687-0568-2020-2-4-1-8","DOIUrl":"https://doi.org/10.17586/2687-0568-2020-2-4-1-8","url":null,"abstract":"","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116621639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-1-29-41
S. Bobylev
{"title":"Structure and Properties of Pseudo-Graphenes. Review","authors":"S. Bobylev","doi":"10.17586/2687-0568-2021-3-1-29-41","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-1-29-41","url":null,"abstract":"","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127457847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-3-27-31
E. Podlesnov, M.G. Nigamatdianov, A.O. Safronova, M. Dorogov
An overview of electrolyte materials for lithium polymer batteries and the prospects for adding metal oxide nanoparticles to the electrolyte are presented in this paper. A procedure for the synthesis of a gel polymer electrolyte based on polyvinylidene fluoride doped with copper oxide nanoparticles is also described, and the ionic conductivity is measured by the electrochemical impedance spectroscopy. Cells with the synthesized electrolyte and LiFePO4 electrode have been assembled and cycled at different currents. Stable cycling and high capacity have been exhibited by the cell with electrolyte doped with copper oxide nanoparticle (wt. 0.1%).
{"title":"Lithium Polymer Battery with PVDF-based Electrolyte Doped with Copper Oxide Nanoparticles: Manufacturing Technology and Properties","authors":"E. Podlesnov, M.G. Nigamatdianov, A.O. Safronova, M. Dorogov","doi":"10.17586/2687-0568-2021-3-3-27-31","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-3-27-31","url":null,"abstract":"An overview of electrolyte materials for lithium polymer batteries and the prospects for adding metal oxide nanoparticles to the electrolyte are presented in this paper. A procedure for the synthesis of a gel polymer electrolyte based on polyvinylidene fluoride doped with copper oxide nanoparticles is also described, and the ionic conductivity is measured by the electrochemical impedance spectroscopy. Cells with the synthesized electrolyte and LiFePO4 electrode have been assembled and cycled at different currents. Stable cycling and high capacity have been exhibited by the cell with electrolyte doped with copper oxide nanoparticle (wt. 0.1%).","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130579897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-2-39-52
D. Bachurin, A. A. Nazarov
{"title":"A Review on Accommodation Processes in Non-Equilibrium Grain Boundaries","authors":"D. Bachurin, A. A. Nazarov","doi":"10.17586/2687-0568-2021-3-2-39-52","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-2-39-52","url":null,"abstract":"","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133942441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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