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One Energy Condition for the Development of an Isolated Crack 产生孤立裂缝的一个能量条件
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080025
V. I. Dunaev, V. V. Kozhevnikov, I. A. Tereshchenko
{"title":"One Energy Condition for the Development of an Isolated Crack","authors":"V. I. Dunaev,&nbsp;V. V. Kozhevnikov,&nbsp;I. A. Tereshchenko","doi":"10.1134/S1028335823080025","DOIUrl":"10.1134/S1028335823080025","url":null,"abstract":"<p>Based on the energy approach to the process of brittle fracture, a new energy criterion for fracture was obtained in the case when an arbitrary normal symmetrical load acts on the surface of an isolated crack.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"257 - 261"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ponderomotive Forces in the Interaction of a Charged Particle with an Inhomogeneous Electromagnetic Wave 带电粒子与非均质电磁波相互作用中的思动力
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823090033
V. B. Lapshin, A. A. Skubachevskii,  A. S. Bugaev
{"title":"Ponderomotive Forces in the Interaction of a Charged Particle with an Inhomogeneous Electromagnetic Wave","authors":"V. B. Lapshin,&nbsp;A. A. Skubachevskii,&nbsp; A. S. Bugaev","doi":"10.1134/S1028335823090033","DOIUrl":"10.1134/S1028335823090033","url":null,"abstract":"<p>Based on analysis of the specific features inherent in the trajectory of a charged particle moving in an inhomogeneous electromagnetic wave, the physical processes determining the nature of ponderomotive forces are specified. In particular, the reason for switching the accelerated motion of a particle passing through an electrical field with zero amplitude in the direction perpendicular to the electrical field to deceleration with an increase in the electrical field amplitude is detailed. The effect of the inertial mass on the trajectory of a charged particle moving in an inhomogeneous electromagnetic wave is determined.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 9","pages":"298 - 301"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deformation of a Two-Dimensional Trace Pattern of a Detonation Flow with a “Continuous” Change in the Width of a Flat Channel 平面通道宽度 "连续 "变化时引爆流二维轨迹模式的变形
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080050
D. I. Kuzovlev, V. V. Markov
{"title":"Deformation of a Two-Dimensional Trace Pattern of a Detonation Flow with a “Continuous” Change in the Width of a Flat Channel","authors":"D. I. Kuzovlev,&nbsp;V. V. Markov","doi":"10.1134/S1028335823080050","DOIUrl":"10.1134/S1028335823080050","url":null,"abstract":"<p>A numerical study of two-dimensional cellular detonation of a hydrogen–air mixture in channels of various widths was carried out, and data were obtained on the process of formation of a cellular structure and on the number, shape, and size of cells depending on the channel width. Based on the results of calculations, classification of two-dimensional cellular detonation structures was carried out. This study was carried out at the facilities of the Joint Supercomputer Center, Russian Academy of Sciences. The flow model of a multicomponent reacting mixture was implemented using a customized opensource solver of the OpenFoam framework based on the Kurganov–Tadmor scheme.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"262 - 266"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carbon-Free Russia: Is There a Chance to Achieve Carbon Neutrality by 2060 无碳俄罗斯：是否有机会在 2060 年之前实现碳中和
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823070030
V. V. Klimenko,  A. V. Klimenko, A. G. Tereshin
{"title":"Carbon-Free Russia: Is There a Chance to Achieve Carbon Neutrality by 2060","authors":"V. V. Klimenko,&nbsp; A. V. Klimenko,&nbsp;A. G. Tereshin","doi":"10.1134/S1028335823070030","DOIUrl":"10.1134/S1028335823070030","url":null,"abstract":"<p>The prospects for reducing the carbon intensity of the Russian economy and the possibility of achieving climate neutrality of the national economy by 2060 are studied. On the basis of a historical-extrapolation approach to the study of the development of various sociotechnical systems by comparison with the dynamics of carbon indicators of the economies of the leading countries of the world, it is shown that full compensation for anthropogenic emissions of greenhouse gases (GHGs) by absorption by the biosphere (primarily forests) is theoretically possible with implementation of difficult-to-implement large-scale reform programs in all sectors of the country’s economy—from energy to forestry. Thus, in an optimistic scenario, the rate of decline in specific GHG emissions per capita should be the maximum value achieved in the world over the past 50 years at 1% per year, and forest management should include full compensation for growing deforestation and a 50% reduction in forest losses from fires, which are currently the second (after energy) source of GHG emissions into the atmosphere. The most likely scenario is one with a rate of reduction in specific GHG emissions per capita of 0.5%/year, and a significant reduction in the sinking capacity of forests to the level of 1990 due to the aging of forests and imperfect reforestation activities. Under the latter scenario, net GHG emissions by 2060 could reach 0.7 Gt CO<sub>2eq</sub>, which would require the creation of a national industry for large-scale carbon capture and storage in order to achieve climate neutrality of the Russian economy.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 7","pages":"223 - 232"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Supersensitive Registration of Polyfunctional Magnetic Nanomaterials for the Rapid Detection of Molecular Markers of Diseases 用于快速检测疾病分子标记物的超灵敏多官能磁性纳米材料注册技术
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823070054
A. V. Orlov, Yu. A. Malkerov, A. M. Skirda, D. O. Novichikhin, S. L. Znoyko, V. A. Bragina, P. I. Nikitin
{"title":"Supersensitive Registration of Polyfunctional Magnetic Nanomaterials for the Rapid Detection of Molecular Markers of Diseases","authors":"A. V. Orlov,&nbsp;Yu. A. Malkerov,&nbsp;A. M. Skirda,&nbsp;D. O. Novichikhin,&nbsp;S. L. Znoyko,&nbsp;V. A. Bragina,&nbsp;P. I. Nikitin","doi":"10.1134/S1028335823070054","DOIUrl":"10.1134/S1028335823070054","url":null,"abstract":"<p>Magnetic particles based on superparamagnetic iron oxide nanocrystals find increasing application in the development of modern techniques for high-precision express determination of biomolecule concentrations. In this work, based on an original technique for the ultrasensitive detection of nonlinear magnetic nanomaterials, we develop a universal method for the use of magnetic particles as polyfunctional agents that simultaneously perform several different functions in a single assay for topical tasks of biochemical and medical diagnostics. The method is tested for the rapid quantitative detection of cardiac markers and SARS-CoV-2-associated molecular markers in complex matrices. The proposed method is promising for creating test systems for prehospital monitoring, in particular, emergency molecular diagnostics in patients with a suspected acute myocardial infarction, and the rapid detection of the coronavirus infection.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 7","pages":"214 - 218"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140884819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Role of the Coupling Coefficient in the Dynamic Problem of Thermoelasticity with Localized Inclusions 耦合系数在带有局部夹杂物的热弹性动力学问题中的作用
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823090045
N. F. Morozov,  D. A. Indeitsev, K. L. Muratikov, D. S. Vavilov, A. A. Kudryavtsev
{"title":"The Role of the Coupling Coefficient in the Dynamic Problem of Thermoelasticity with Localized Inclusions","authors":"N. F. Morozov,&nbsp; D. A. Indeitsev,&nbsp;K. L. Muratikov,&nbsp;D. S. Vavilov,&nbsp;A. A. Kudryavtsev","doi":"10.1134/S1028335823090045","DOIUrl":"10.1134/S1028335823090045","url":null,"abstract":"<p>The dynamic problem of thermoelasticity with a localized inclusion in a medium is considered. It is shown that in the resonant regime an important role is played by the coupling coefficient of the temperature and strain fields. The coupling of the problem and the presence of a discrete spectrum lead to the appearance of an additional term in the expression for temperature, which is localized and does not describe the diffusion process.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 9","pages":"306 - 310"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and Theoretical Investigations of High-Temperature Creep of the ENAW 5251 (AMg2) Aluminum Alloy under Step Loading 阶跃载荷下ENAW 5251 (AMg2) 铝合金高温蠕变的实验和理论研究
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823070017
A. R. Arutyunyan, R. R. Saitova
{"title":"Experimental and Theoretical Investigations of High-Temperature Creep of the ENAW 5251 (AMg2) Aluminum Alloy under Step Loading","authors":"A. R. Arutyunyan,&nbsp;R. R. Saitova","doi":"10.1134/S1028335823070017","DOIUrl":"10.1134/S1028335823070017","url":null,"abstract":"<p>In conditions of high-temperature creep, the evolution of the damage of metallic materials is observed. To describe this effect, the damage conception of Kachanov–Rabotnov is used. The damage parameter is defined as the relative changes in the material density, which is an integral characteristic of the damage. Taking into account this parameter and the law of conservation of mass, interrelated kinetic equations for creep deformation and the damage parameter are formulated. Analytical solutions of these equations are obtained for the case of two-stage loading. Experimental studies of the uniaxial stress state under conditions of high-temperature creep under two-stage loading of the aluminum alloy ENAW 5251 (AMg2) at a temperature of 250°C were conducted. A good agreement of the obtained theoretical curves with the experimental results is observed.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 7","pages":"219 - 222"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Specific Features of Electron Runaway in a Gas Gap with a Conical Cathode 锥形阴极气隙中电子失控的具体特征
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823090070
N. M. Zubarev, O. V. Zubareva,  M. I. Yalandin
{"title":"Specific Features of Electron Runaway in a Gas Gap with a Conical Cathode","authors":"N. M. Zubarev,&nbsp;O. V. Zubareva,&nbsp; M. I. Yalandin","doi":"10.1134/S1028335823090070","DOIUrl":"10.1134/S1028335823090070","url":null,"abstract":"<p>The conditions and dynamics of electron runaway in a gas gap with an inhomogeneous electric field distribution due to the use of a conic cathode are analyzed. Significant distinctions in the behavior of electrons at cone opening angles larger and smaller than the threshold value of 98.6° are revealed. For a weakly inhomogeneous field distribution (cones with angles above the threshold), electrons are continuously accelerated throughout the entire gap. In a strongly inhomogeneous field (cones with comparatively small opening angles), electrons may gain a maximum energy within the gap and start to decelerate in the near-anode area. However, they reach the anode with high energies comparable to the electric field work. Such a difference necessitates the use of different criteria for the runaway of free electrons in the gas gap.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 9","pages":"279 - 283"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dependence of the Position of Phonon IR Absorption Bands of Germanium Isotopes on Their Mass Number 锗同位素的声子红外吸收带位置与质量数的关系
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080049
G. I. Kropotov,  A. D. Bulanov, V. E. Rogalin, I. A. Kaplunov, A. A. Shakhmin
{"title":"Dependence of the Position of Phonon IR Absorption Bands of Germanium Isotopes on Their Mass Number","authors":"G. I. Kropotov,&nbsp; A. D. Bulanov,&nbsp;V. E. Rogalin,&nbsp;I. A. Kaplunov,&nbsp;A. A. Shakhmin","doi":"10.1134/S1028335823080049","DOIUrl":"10.1134/S1028335823080049","url":null,"abstract":"<p>For the first time, in a single experiment, the dependence of the position of the phonon absorption peaks in the IR spectrum (range 11–40 μm) for all five stable monoisotopic germanium single crystals was studied. The dependence obtained can be used to study the mass composition of germanium of various isotopic purity.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"241 - 245"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electronic and Magnetic Properties of Alloys Based on the Cd3As2 Dirac Semimetal Doped with Mn Atoms in Different Concentrations 基于掺杂不同浓度锰原子的 Cd3As2 迪拉茨半金属合金的电子和磁性能
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S102833582309001X
E. T. Kulatov, Yu. A. Uspenskii
{"title":"Electronic and Magnetic Properties of Alloys Based on the Cd3As2 Dirac Semimetal Doped with Mn Atoms in Different Concentrations","authors":"E. T. Kulatov,&nbsp;Yu. A. Uspenskii","doi":"10.1134/S102833582309001X","DOIUrl":"10.1134/S102833582309001X","url":null,"abstract":"<p>Theoretical studies predict that the light magnetic doping of Dirac semimetals leads to the occurrence of extraordinary properties and quantum states, including the Weyl semimetal, axionic insulator, topological superconductor, and others. However, thespecific materials that can exhibit these phenomena, as well as the characteristic concentrations of magnetic atoms are still unknown. In this work, the ab initio study of the electronic and magnetic properties of the Cd<sub>3</sub>As<sub>2</sub> Dirac semimetal doped isoelectronically with Mn atoms at concentrations of 4, 6, and 8% has been carried out. In the analysis of the results, the main focus has been on the break of the spatial and time symmetry in the alloys, the behavior of the electron spectrum near the top of the Dirac cone, and spin ordering processes in Mn atoms. The results obtained have been compared with the previous theoretical and experimental data and, based on these results, a detailed picture of the effect of isoelectronic magnetic doping on the properties of the Cd<sub>3</sub>As<sub>2</sub> Dirac semimetal has been presented.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 9","pages":"291 - 297"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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