The Jeans instability in collisional dusty plasmas has been analytically investigated by considering the polarization force effect. Instabilities due to dust-neutral and ion-neutral drags can occur in electrostatic wa...The Jeans instability in collisional dusty plasmas has been analytically investigated by considering the polarization force effect. Instabilities due to dust-neutral and ion-neutral drags can occur in electrostatic waves of collisional dusty plasmas with self-gravitating particles. In this study, the effect of gravitational force on heavy dust particles is considered in tandem with both the polarization and electrostatic forces. The theoretical framework has been developed and the dispersion relation and instability growth rate have been derived, assuming the plane wave approximation. The derived instability growth rate shows that, in collisional dusty plasmas, the Jeans instability strongly depends on the magnitude of the polarization force.展开更多
The generalization of Jeans equation in expanding and rotating Universe is given. We found the generalized frequency of baryonic substrate oscillations in the rotating Universe. In doing this, two cases were considere...The generalization of Jeans equation in expanding and rotating Universe is given. We found the generalized frequency of baryonic substrate oscillations in the rotating Universe. In doing this, two cases were considered: the generalized wave vector coincides with the Jeans wave vector and second case, when the generalized wave vector tends to zero.展开更多
Based on the framework of Kaniadakis’statistics and its related kinetic theory,the Jeans instability for selfgravitational systems in the background of Eddington-inspired Born-Infield(EiBI)gravity is revisited.A disp...Based on the framework of Kaniadakis’statistics and its related kinetic theory,the Jeans instability for selfgravitational systems in the background of Eddington-inspired Born-Infield(EiBI)gravity is revisited.A dispersion relation generalizing the Jeans modes is derived by modifying the Maxwellian distribution to a family of power law distributions parameterized by the κ parameter.It is established that theκ-deformed Kaniadakis distribution has significant effects on the Jeans modes of the collisionless EiBI-gravitational systems.And as expected,in the limitation κ→0,the corresponding results for Maxwellian case are recovered.The related result in the present work is valuable for the investigations involving the fields of astrophysics such as neutron stars,accretion disks,and relevant plasma physics,etc.展开更多
The possibility of baryons cooled by a millicharged dark matter(mDM)via mDM–baryons scattering has recently been proposed to explain the observation discrepancy from the experiment to detect the global epoch of reion...The possibility of baryons cooled by a millicharged dark matter(mDM)via mDM–baryons scattering has recently been proposed to explain the observation discrepancy from the experiment to detect the global epoch of reionization signature(EDGES).In this sense,we analyze the Jeans instability of self-gravitational systems in the background of mDM under kinetic regime that the collisionless Boltzmann equation and Poisson equation have been combined to obtain the modified dispersion relation.It is shown that the effect of mDM is significant on the dynamics of gravitational collapse,i.e.,the presence of mDM makes the self-gravitational systems more difficult to collapse relatively.展开更多
第68界Pitti Immagine Uomo开幕之际，佛罗伦萨的Stazione Leopolda Spaces同时迎来了颇具魔幻色彩的展览。L＇Altro Jeans主题展不仅演绎了“牛仔文化”．构筑了“Jeans”的当代语境，同时再现了具有颠覆和创新精神的“牛仔革新者”Mar...第68界Pitti Immagine Uomo开幕之际，佛罗伦萨的Stazione Leopolda Spaces同时迎来了颇具魔幻色彩的展览。L＇Altro Jeans主题展不仅演绎了“牛仔文化”．构筑了“Jeans”的当代语境，同时再现了具有颠覆和创新精神的“牛仔革新者”Marithe和Francois Girbaud这对法国夫妇40年来的探索和追求——“II faut laver le jean de ses idees”（让牛仔呈现自身观念）。展开更多
The M’s Dream brand pure silk jeans are novel brand name garments developed by the M’s Dream Clothing and Accessories Design Institute. The pure silk jeans are processed from proteinase for the chemical treatment of...The M’s Dream brand pure silk jeans are novel brand name garments developed by the M’s Dream Clothing and Accessories Design Institute. The pure silk jeans are processed from proteinase for the chemical treatment of silk fabrics through mechanical friction. It combines the advantages of pure cotton jeans and pure silks with plump and thick silk surface, and is noted for its展开更多
Jean Toomer was an important figure in African-American literature. He was an American poet,novelist and an important figure of the Harlem Renaissance. His most famous work,Cane,was published in 1923 and considered by...Jean Toomer was an important figure in African-American literature. He was an American poet,novelist and an important figure of the Harlem Renaissance. His most famous work,Cane,was published in 1923 and considered by many as a masterpiece of the Harlem Renaissance. Reapers is the first poem in Cane which is related to the reapers in southern plantation and rich in imagery. Toomer conveys profound theme by using various images in Reapers.展开更多
1 Introduction Throughout his life,Jean-Pierre Abel-Rémusat(1788-1832)(Fig.1)was in contact with the medical art,through his family,through his studies,through a few moments of practice,through his various intere...1 Introduction Throughout his life,Jean-Pierre Abel-Rémusat(1788-1832)(Fig.1)was in contact with the medical art,through his family,through his studies,through a few moments of practice,through his various interests and in many of his written.展开更多
Published in 1923, Cane, the representative work of Jean Toomer has been widely studied by critics. Among which,one of perspectives is to analyze the biblical metaphors in the novel. A closer reading of the book shows...Published in 1923, Cane, the representative work of Jean Toomer has been widely studied by critics. Among which,one of perspectives is to analyze the biblical metaphors in the novel. A closer reading of the book shows that the Cain allusion is an unifying theme, for the author once refers Cane as Cain, and most of the characters in the novel are blacks who are believed to be descendant of Cain because of the color of their skin as well as the same suffering of isolation and alienation. Here a study of the Cain allusion in the novel is presented with focus on Karintha's story in the first part of Cane.展开更多
文摘The Jeans instability in collisional dusty plasmas has been analytically investigated by considering the polarization force effect. Instabilities due to dust-neutral and ion-neutral drags can occur in electrostatic waves of collisional dusty plasmas with self-gravitating particles. In this study, the effect of gravitational force on heavy dust particles is considered in tandem with both the polarization and electrostatic forces. The theoretical framework has been developed and the dispersion relation and instability growth rate have been derived, assuming the plane wave approximation. The derived instability growth rate shows that, in collisional dusty plasmas, the Jeans instability strongly depends on the magnitude of the polarization force.
文摘The generalization of Jeans equation in expanding and rotating Universe is given. We found the generalized frequency of baryonic substrate oscillations in the rotating Universe. In doing this, two cases were considered: the generalized wave vector coincides with the Jeans wave vector and second case, when the generalized wave vector tends to zero.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11763006 and 11863004)the Fund from the Jiangxi Provincial Key Laboratory of Fusion and Information Control(Grant No.20171BCD40005).
文摘Based on the framework of Kaniadakis’statistics and its related kinetic theory,the Jeans instability for selfgravitational systems in the background of Eddington-inspired Born-Infield(EiBI)gravity is revisited.A dispersion relation generalizing the Jeans modes is derived by modifying the Maxwellian distribution to a family of power law distributions parameterized by the κ parameter.It is established that theκ-deformed Kaniadakis distribution has significant effects on the Jeans modes of the collisionless EiBI-gravitational systems.And as expected,in the limitation κ→0,the corresponding results for Maxwellian case are recovered.The related result in the present work is valuable for the investigations involving the fields of astrophysics such as neutron stars,accretion disks,and relevant plasma physics,etc.
基金the National Natural Science Foundation of China(Grant Nos.11763006 and 11863004)the fund from the Jiangxi Provincial Key Laboratory of Fusion and Information Control(Grant No.20171BCD40005)the Project of Scientific and Technological Innovation Base of Jiangxi Province,China(Grant No.20203CCD46008)。
文摘The possibility of baryons cooled by a millicharged dark matter(mDM)via mDM–baryons scattering has recently been proposed to explain the observation discrepancy from the experiment to detect the global epoch of reionization signature(EDGES).In this sense,we analyze the Jeans instability of self-gravitational systems in the background of mDM under kinetic regime that the collisionless Boltzmann equation and Poisson equation have been combined to obtain the modified dispersion relation.It is shown that the effect of mDM is significant on the dynamics of gravitational collapse,i.e.,the presence of mDM makes the self-gravitational systems more difficult to collapse relatively.
文摘第68界Pitti Immagine Uomo开幕之际，佛罗伦萨的Stazione Leopolda Spaces同时迎来了颇具魔幻色彩的展览。L＇Altro Jeans主题展不仅演绎了“牛仔文化”．构筑了“Jeans”的当代语境，同时再现了具有颠覆和创新精神的“牛仔革新者”Marithe和Francois Girbaud这对法国夫妇40年来的探索和追求——“II faut laver le jean de ses idees”（让牛仔呈现自身观念）。
文摘The M’s Dream brand pure silk jeans are novel brand name garments developed by the M’s Dream Clothing and Accessories Design Institute. The pure silk jeans are processed from proteinase for the chemical treatment of silk fabrics through mechanical friction. It combines the advantages of pure cotton jeans and pure silks with plump and thick silk surface, and is noted for its
文摘Jean Toomer was an important figure in African-American literature. He was an American poet,novelist and an important figure of the Harlem Renaissance. His most famous work,Cane,was published in 1923 and considered by many as a masterpiece of the Harlem Renaissance. Reapers is the first poem in Cane which is related to the reapers in southern plantation and rich in imagery. Toomer conveys profound theme by using various images in Reapers.
文摘1 Introduction Throughout his life,Jean-Pierre Abel-Rémusat(1788-1832)(Fig.1)was in contact with the medical art,through his family,through his studies,through a few moments of practice,through his various interests and in many of his written.
文摘Published in 1923, Cane, the representative work of Jean Toomer has been widely studied by critics. Among which,one of perspectives is to analyze the biblical metaphors in the novel. A closer reading of the book shows that the Cain allusion is an unifying theme, for the author once refers Cane as Cain, and most of the characters in the novel are blacks who are believed to be descendant of Cain because of the color of their skin as well as the same suffering of isolation and alienation. Here a study of the Cain allusion in the novel is presented with focus on Karintha's story in the first part of Cane.
