Doklady Physics最新文献_第3页

Traveling Waves in Nondispersive Strongly Inhomogeneous Media 非色散强非均匀介质中的行波

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100081

E. N. Pelinovsky, O. V. Kaptsov

引用次数: 0

Energy, Demography, and Climate: Is There an Alternative to Abandoning Fossil Fuels? 能源、人口和气候:放弃化石燃料还有别的选择吗?

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S102833582210007X

V. V. Klimenko, A. V. Klimenko, O. V. Mikushina, A. G. Tereshin

{"title":"Energy, Demography, and Climate: Is There an Alternative to Abandoning Fossil Fuels?","authors":"V. V. Klimenko,  A. V. Klimenko, O. V. Mikushina, A. G. Tereshin","doi":"10.1134/S102833582210007X","DOIUrl":"10.1134/S102833582210007X","url":null,"abstract":"Alternative scenarios for the development of world energy, based on low options for the change in the population of the planet, are being explored from the point of view of preventing dangerous global climate change. It has been shown that in order to keep the increase in the average global temperature within safe limits while maintaining the current growth rates of energy consumption and the population of the planet, a radical restructuring of the world energy industry is necessary—the “great energy transition”—with a complete rejection of the use of fossil fuels in the coming decades, which seems impossible given the inertia of development and spread of energy technologies. Using the author’s approaches to forecasting the volume and structure of world energy consumption, alternative scenarios for carbon dioxide emissions have been formed in the implementation of low, but quite realistic trends for demographic dynamics. Based on simulations of models of the global carbon cycle and climate, it is shown that the development of natural demographic processes is able to restrain growth and ensure a further decrease in the concentration of carbon dioxide in the Earth’s atmosphere, limiting the increase in the average global temperature to a completely safe level of 1.8 degrees compared to the pre-industrial period without large-scale restructuring of the world energy.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"433 - 438"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289389","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: 1

Heat Transfer Processes at Early Stages of Crystal Nucleation in Glass-Forming Materials and Polymers 玻璃成形材料和聚合物晶体成核初期的传热过程

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110064

A. A. Minakov

引用次数: 0

The Giant Effect of Nonreciprocity for the Microwave Magnetoresistance of (CoFe)/Cu Superlattices 非互易性对(CoFe)/Cu超晶格微波磁电阻的巨大影响

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100093

V. V. Ustinov, A. B. Rinkevich, M. A. Milyaev, E. A. Kuznetsov, D. V. Perov

引用次数: 0

Change of Orientation of a Body by Means of Three Pairs of Movable Masses 用三对可移动的质量来改变物体的方向

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100020

F. L. Chernousko

引用次数: 0

A Thermal Protective Respirator Based on Granular Phase Change Materials 基于颗粒相变材料的热防护呼吸器

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120035

N. A. Lutsenko, S. S. Fetsov

引用次数: 0

A New Type of Uncontrolled Multichannel Discharger for Nanosecond Switching of Megaampere Currents 一种用于毫安电流纳秒开关的新型无控多通道放电装置

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100044

E. A. Galanova, Yu. N. Dolin, A. V. Ivanovsky, A. E. Kalinychev, G. V. Karpov, S. S. Lomtev, A. G. Merzlov, V. N. Nudikov, D. S. Prokhorov, E. A. Salatov, A. N. Turov, A. A. Shatalin

{"title":"A New Type of Uncontrolled Multichannel Discharger for Nanosecond Switching of Megaampere Currents","authors":"E. A. Galanova, Yu. N. Dolin, A. V. Ivanovsky, A. E. Kalinychev, G. V. Karpov, S. S. Lomtev, A. G. Merzlov, V. N. Nudikov, D. S. Prokhorov, E. A. Salatov, A. N. Turov, A. A. Shatalin","doi":"10.1134/S1028335822100044","DOIUrl":"10.1134/S1028335822100044","url":null,"abstract":"A multichannel uncontrolled discharger based on staged breakdown of a multilayer film insulator with an enclosed foil plate under floating potential has been developed. An abrupt change in the foil potential after a single-channel initial self-breakdown between the foil and one of the electrodes leads to a multi-channel secondary breakdown between the foil and the other electrode. Cumulative plasma jets are generated in places of breakdown and they initiate the formation of the through current channels between the electrodes at the third stage of the breakdown. The developed multichannel discharger has a nanosecond response time and can be used to sharpen the voltage pulse front in the electric-discharge devices with megaampere currents. A similar method of formation of a multichannel breakdown can be used in the development of nanosecond switches of multimegaampere currents in the directions of thermonuclear research with the use of explosive magnetic energy generators.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"405 - 409"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4945053","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

Equations of Motion of a Space Body at a Variable Velocity of Discharging Combustion Products in the Prerequisites of the Special Theory of Relativity 在狭义相对论的前提下，空间物体以变速度排出燃烧产物的运动方程

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120072

U. N. Zakirov

引用次数: 0

Material Damage to a Target Caused by an Impact with an Elongated Body 用拉长的身体撞击对目标造成物质伤害

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110027

S. N. Buravova, E. V. Petrov, M. I. Alymov, V. O. Kopytskiy

{"title":"Material Damage to a Target Caused by an Impact with an Elongated Body","authors":"S. N. Buravova, E. V. Petrov,  M. I. Alymov, V. O. Kopytskiy","doi":"10.1134/S1028335822110027","DOIUrl":"10.1134/S1028335822110027","url":null,"abstract":"Wave pattern analysis of the interaction of an elongated impactor with a target allowed us to establish a number of previously unknown features of the process. The entire length of the impactor can be divided into sections where the wave pattern repeats the initial phase of the impact, while the role of the target is played by the impactor material. Throughout the entire process of interaction of the two bodies, the mass velocity and the pressure behind the shock wave front moving along the side face have constant values equal to (0.25–0.32) of the initial value. The cycle itself is characterized by two stages. At the first stage, the convergence of the lateral unloading waves on the contact surface leads to the establishment of zero pressure, a layer of unloaded material is formed between the shock waves in the target and the impactor, while the impactor penetration stops. A needle-like crack along the symmetry axis appears as a result of focusing the unloading lateral waves. The second stage is characterized by shock wave attenuation. The incoming flow, the velocity of which is equal to the impact velocity, is braking at the attenuation wave front, which leads to an increase in pressure and the formation of compression impulses. The arrival of compression impulses on the target restores the interrupted process of the impactor penetration and creates new spall damage in the rings from around the needle-like spall, as a result of the unloading waves interference, the sources of which are the spall cracks formed earlier and the impactor side face.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"447 - 450"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4939852","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

Spin-Fluctuation Transitions in MnSi According to Electron Paramagnetic Resonance and Neutron Scattering 基于电子顺磁共振和中子散射的MnSi自旋涨落跃迁

IF 0.8 4区物理与天体物理

Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100032

S. V. Demishev

{"title":"Spin-Fluctuation Transitions in MnSi According to Electron Paramagnetic Resonance and Neutron Scattering","authors":"S. V. Demishev","doi":"10.1134/S1028335822100032","DOIUrl":"10.1134/S1028335822100032","url":null,"abstract":"The experimental data on low-temperature (T < 40 K) neutron scattering and electron paramagnetic resonance for a helical magnet manganese monosilicide (MnSi) are analyzed. It is established that the smooth evolution of the parameters of spin fluctuations considered both in the conventional theory of magnetic phase transitions and in its generalization to the case of helical magnets is disturbed by the presence of spin-fluctuation transitions (SFTs) in which the amplitude of spin fluctuations and their correlation radius change sharply. In a zero magnetic field, the transition at the temperature Tc = 29 K, which is usually interpreted as the transition to a helical magnetically ordered phase, is preceded by two spin-fluctuation transitions with T1 = 32 K and T2 = 30.5 K. In a magnetic field of B ~ 2 T at a temperature of 29 K coinciding with Tc, another spin-fluctuation transition with the parameters characteristic for the SFT inside the magnetically ordered phase is discovered. It is shown that, as the temperature decreases, MnSi at T = T1 undergoes the SFT with the appearance of helical fluctuations, while the appearance of a helical phase (B = 0) or a spin-polarized phase (B = 2 T) occurs at T = T2 and is accompanied by a spin-fluctuation transition.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"410 - 414"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4938597","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