In the present paper, we endeavor to accomplish a diagram, which demarcates the validity ranges for interfacial wave theories in a two-layer system, to meet the needs of design in ocean engineering. On the basis of th...In the present paper, we endeavor to accomplish a diagram, which demarcates the validity ranges for interfacial wave theories in a two-layer system, to meet the needs of design in ocean engineering. On the basis of the available solutions of periodic and solitary waves, we propose a guideline as principle to identify the validity regions of the interfacial wave theories in terms of wave period T, wave height H, upper layer thickness dl, and lower layer thick-ness d2, instead of only one parameter-water depth d as in the water surface wave circumstance. The diagram proposed here happens to be Le Mehaute＇s plot for free surface waves if water depth ratio r= d1/d2 approaches to infinity and the upper layer water density p1 to zero. On the contrary, the diagram for water surface waves can be used for two-layer interfacial waves if gravity acceleration g in it is replaced by the reduced gravity defined in this study under the condition of σ=（P2 - Pl）/P2 → 1.0 and r 〉 1.0. In the end, several figures of the validity ranges for various interfacial wavetheories in the two-layer fluid are given and compared with the results for surface waves.展开更多
Based on numerous geological data obtained by the authors for several decades, the stratification of Permian and Carboniferous ancient and exotic blocks of Crimean Mountains is performed. The sequence of geological ev...Based on numerous geological data obtained by the authors for several decades, the stratification of Permian and Carboniferous ancient and exotic blocks of Crimean Mountains is performed. The sequence of geological events that cause their origin is revealed. Carnian-Norian, Rhaetian-Hettangian and Early-Pliensbachian phases of collapse, sliding and burial of Paleozoic blocks are specified. Final stage (block re-deposition) is confined to the Toarcian and Aalenian ages. The data obtained allow re-interpreting the origin of ancient exotic blocks of the Crimea.展开更多
During the last decades, mankind has suffered from devastation caused by natural disasters and technological accidents of increased frequency and children are among the most vulnerable population group, especially tho...During the last decades, mankind has suffered from devastation caused by natural disasters and technological accidents of increased frequency and children are among the most vulnerable population group, especially those attending school during times of disaster. The importance of education in promoting and enabling disaster risk reduction has already been identified by researchers. In this paper “Disaster Date Center (DDC)” is presented, a new, powerful and innovative tool for the study of and education on disasters. One noteworthy application of DDC is the educational and public awareness tool in the form of e-learning.展开更多
Childhood maltreatment(CM)has been consistently linked with numerous detrimental outcomes concerning physical and psychological health.However,few studies have explored vulnerability to neurological disorders after CM...Childhood maltreatment(CM)has been consistently linked with numerous detrimental outcomes concerning physical and psychological health.However,few studies have explored vulnerability to neurological disorders after CM.Early life adversity,in the form of poverty,stress and abuse,has been associated with decline in cognitive function and dementia later in life(Short and Baram,2019).Robust preclinical data suggest that early life stress(ELS)may increase the risk and worsen the course of neurological disorders such as Alzheimer’s(AD)and Parkinson’s(PD)diseases,and traumatic brain injury(TBI)(Lesuis et al.,2018;Short and Baram,2019;He et al.,2020;Catale et al.,2021;Sanchez et al.,2021).展开更多
This project studies marine terraces in western Messenia, southwestern Peloponnese, Greece, to propose a model of neotectonic configuration and paleogeographic evolution of western Messenia during the Quaternary. GIS ...This project studies marine terraces in western Messenia, southwestern Peloponnese, Greece, to propose a model of neotectonic configuration and paleogeographic evolution of western Messenia during the Quaternary. GIS analysis of topographic data and geological mapping revealed flanks of raised terraces created on Quaternary marine deposits. Luminescence ages of sediments from the three westernmost marine terraces tend to be consistent OIS-5, OIS-7 and OIS-9, respectively, thus agreeing with the three latest warm stages of the Pleistocene. Moreover, the type and the extent of deformation of the dated marine terraces allowed us to reflect on the neotectonic configuration of western Messenia as well as to conclude that progressive differential uplift over the last 300 ka has induced a dome-like structure to the upper crust of western Messenia.展开更多
This study aims to investigate the scope of methods for the reconstruction of time-delay systems.We consider an approach to the reconstruction of time-delay systems based on the synchronous response of the driven syst...This study aims to investigate the scope of methods for the reconstruction of time-delay systems.We consider an approach to the reconstruction of time-delay systems based on the synchronous response of the driven system with the structure similar to the structure of the studied object.This approach is used for the recovery of the parameters of timedelay systems from short and noisy time series.To show the operational performance and capabilities of this approach,the parameters were reconstructed for a radiophysical chaotic generator with quadratic nonlinearity and for the model of a system for the baroreflectory regulation of the mean arterial pressure.展开更多
基金the Knowledge Innovation Project of CAS(KJCX-YW-L02)the National 863 Project of China(2006AAO9A103-4)+1 种基金China National Oil Corporation in Beijing(CNOOC)the National Natural Science Foundation of China(10672056).
文摘In the present paper, we endeavor to accomplish a diagram, which demarcates the validity ranges for interfacial wave theories in a two-layer system, to meet the needs of design in ocean engineering. On the basis of the available solutions of periodic and solitary waves, we propose a guideline as principle to identify the validity regions of the interfacial wave theories in terms of wave period T, wave height H, upper layer thickness dl, and lower layer thick-ness d2, instead of only one parameter-water depth d as in the water surface wave circumstance. The diagram proposed here happens to be Le Mehaute＇s plot for free surface waves if water depth ratio r= d1/d2 approaches to infinity and the upper layer water density p1 to zero. On the contrary, the diagram for water surface waves can be used for two-layer interfacial waves if gravity acceleration g in it is replaced by the reduced gravity defined in this study under the condition of σ=（P2 - Pl）/P2 → 1.0 and r 〉 1.0. In the end, several figures of the validity ranges for various interfacial wavetheories in the two-layer fluid are given and compared with the results for surface waves.
文摘Based on numerous geological data obtained by the authors for several decades, the stratification of Permian and Carboniferous ancient and exotic blocks of Crimean Mountains is performed. The sequence of geological events that cause their origin is revealed. Carnian-Norian, Rhaetian-Hettangian and Early-Pliensbachian phases of collapse, sliding and burial of Paleozoic blocks are specified. Final stage (block re-deposition) is confined to the Toarcian and Aalenian ages. The data obtained allow re-interpreting the origin of ancient exotic blocks of the Crimea.
文摘During the last decades, mankind has suffered from devastation caused by natural disasters and technological accidents of increased frequency and children are among the most vulnerable population group, especially those attending school during times of disaster. The importance of education in promoting and enabling disaster risk reduction has already been identified by researchers. In this paper “Disaster Date Center (DDC)” is presented, a new, powerful and innovative tool for the study of and education on disasters. One noteworthy application of DDC is the educational and public awareness tool in the form of e-learning.
基金supported by the Italian Ministry of Health,Young Researcher Grant,No.GR-2009-1576820(to VC)by Linea D.1.2019 UniversitàCattolica del S.Cuore(to MTV).
文摘Childhood maltreatment(CM)has been consistently linked with numerous detrimental outcomes concerning physical and psychological health.However,few studies have explored vulnerability to neurological disorders after CM.Early life adversity,in the form of poverty,stress and abuse,has been associated with decline in cognitive function and dementia later in life(Short and Baram,2019).Robust preclinical data suggest that early life stress(ELS)may increase the risk and worsen the course of neurological disorders such as Alzheimer’s(AD)and Parkinson’s(PD)diseases,and traumatic brain injury(TBI)(Lesuis et al.,2018;Short and Baram,2019;He et al.,2020;Catale et al.,2021;Sanchez et al.,2021).
基金supported by the State Scholarships Foundation of Greece(No.1500521537.008.040)
文摘This project studies marine terraces in western Messenia, southwestern Peloponnese, Greece, to propose a model of neotectonic configuration and paleogeographic evolution of western Messenia during the Quaternary. GIS analysis of topographic data and geological mapping revealed flanks of raised terraces created on Quaternary marine deposits. Luminescence ages of sediments from the three westernmost marine terraces tend to be consistent OIS-5, OIS-7 and OIS-9, respectively, thus agreeing with the three latest warm stages of the Pleistocene. Moreover, the type and the extent of deformation of the dated marine terraces allowed us to reflect on the neotectonic configuration of western Messenia as well as to conclude that progressive differential uplift over the last 300 ka has induced a dome-like structure to the upper crust of western Messenia.
基金supported by the Russian Foundation for Basic Research(Grant No.18-07-00205)the President of the Russian Federation(Grant No.MD-2202.2019.8).
文摘This study aims to investigate the scope of methods for the reconstruction of time-delay systems.We consider an approach to the reconstruction of time-delay systems based on the synchronous response of the driven system with the structure similar to the structure of the studied object.This approach is used for the recovery of the parameters of timedelay systems from short and noisy time series.To show the operational performance and capabilities of this approach,the parameters were reconstructed for a radiophysical chaotic generator with quadratic nonlinearity and for the model of a system for the baroreflectory regulation of the mean arterial pressure.
