Current-density functional theory of time-dependent linear response in quantal fluids: recent progress

Vignale and Kohn have recently formulated a local density approximation to the time-dependent linear response of an inhomogeneous electron system in terms of a vector potential for exchange and correlation. The vector potential depends on the induced current density through spectral kernels to be evaluated on the homogeneous electron-gas. After a brief review of their theory, the case of inhomogeneous Bose superfluids is considered, with main focus on dynamic Kohn-Sham equations for the condensate in the linear response regime and on quantal generalized hydrodynamic equations in the weak inhomogeneity limit. We also present the results of calculations of the exchange-correlation spectra in both electron and superfluid boson systems.Comment: 12 pages, 2 figures, Postscript fil

Using the local density approximation and the LYP, BLYP, and B3LYP functionals within Reference--State One--Particle Density--Matrix Theory

For closed-shell systems, the local density approximation (LDA) and the LYP, BLYP, and B3LYP functionals are shown to be compatible with reference-state one-particle density-matrix theory, where this recently introduced formalism is based on Brueckner-orbital theory and an energy functional that includes exact exchange and a non-universal correlation-energy functional. The method is demonstrated to reduce to a density functional theory when the exchange-correlation energy-functional has a simplified form, i.e., its integrand contains only the coordinates of two electron, say r1 and r2, and it has a Dirac delta function -- delta(r1 - r2) -- as a factor. Since Brueckner and Hartree--Fock orbitals are often very similar, any local exchange functional that works well with Hartree--Fock theory is a reasonable approximation with reference-state one-particle density-matrix theory. The LDA approximation is also a reasonable approximation. However, the Colle--Salvetti correlation-energy functional, and the LYP variant, are not ideal for the method, since these are universal functionals. Nevertheless, they appear to provide reasonable approximations. The B3LYP functional is derived using a linear combination of two functionals: One is the BLYP functional; the other uses exact exchange and a correlation-energy functional from the LDA.Comment: 26 Pages, 0 figures, RevTeX 4, Submitted to Mol. Phy

Warming Up Density Functional Theory

Density functional theory (DFT) has become the most popular approach to electronic structure across disciplines, especially in material and chemical sciences. Last year, at least 30,000 papers used DFT to make useful predictions or give insight into an enormous diversity of scientific problems, ranging from battery development to solar cell efficiency and far beyond. The success of this field has been driven by usefully accurate approximations based on known exact conditions and careful testing and validation. In the last decade, applications of DFT in a new area, warm dense matter, have exploded. DFT is revolutionizing simulations of warm dense matter including applications in controlled fusion, planetary interiors, and other areas of high energy density physics. Over the past decade or so, molecular dynamics calculations driven by modern density functional theory have played a crucial role in bringing chemical realism to these applications, often (but not always) with excellent agreement with experiment. This chapter summarizes recent work from our group on density functional theory at non-zero temperatures, which we call thermal DFT. We explain the relevance of this work in the context of warm dense matter, and the importance of quantum chemistry to this regime. We illustrate many basic concepts on a simple model system, the asymmetric Hubbard dimer

Celebrity of Instagram and Endorsements: Shaping and Constructing Social Identity

Purpose: This research aims to explore how endorsements by celebrities on Instagram play a role in the formation and development of social identities among users. It will investigate the psychological processes, including relationships and the desire for social connection, that influence the link between celebrity impact and identity development. Methods: The method used was a qualitative descriptive method, data collection techniques by observations, interviews and documentations. Researchers choose influencers with high engagement rates. Key Informants that being choosen are three celebgram from Palembang, South Sumatera, Indonesia. Findings: A celebrity\u27s social identity is shaped by their interactions with their fans, as seen by the quantity of views, comments, direct messages, re-posts, and mentions. Along with participation, interpersonal interactions, communication style, social relationships, lifestyle relevance, and the presence of online communities. The visual appearance of celebrities is a major factor in the success of product endorsements because visuals are the first element that attracts the audience\u27s attention. Originality: The originality of this study stems from identifying a distinctive concept known as ‘Local Empathetic Communication’ as an essential element in forming social identity among celebgrams in Palembang. In contrast to prior research, this study combines the Social Construction of Reality Theory with the VisCap Model to illustrate that followers engage more deeply with influencers who embody local culture and values through empathetic and relatable dialogue. This emphasis on a localized emotional connection has not been previously addressed in earlier works, making it a new and significant contribution to the discipline

Jenerik 2021, 17(1)

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Jenerik 2020, 16(2)

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Forgotten Phenomenon, Lost Songs: Chandrabati and Her Literature in Modern Bangladesh

University of Technology Sydney. Faculty of Arts and Social Sciences.This thesis focus on the first woman poet of Bengal, Chandrabati and her literary works. Chandrabati who was born in the sixteenth century has written many songs and ballads which contain important elements and insights of her time. Her songs were one of the very first depictions of Bengali women, written from a woman’s perspective. Moreover, her version of , for its content, style and approach, can be attributed as one of the most important and unique retellings of in Bengali. The search for the relevance and importance of Chandrabati’s songs and ballads to the people, especially the women of present-day Bangladesh brought out the sad reality of Chandrabati’s disappearance of people’s memories and lives. Beside exploring Chandrabati’s life, the unique qualities of her songs and ballads, and their importance in writing the history of medieval Bengal, this thesis aims to find out the reasons why the people of Bangladesh forgot the poet they once adored. Besides this thesis demonstrates the journey of some contemporary cultural activists who are trying to reintroduce Chandrabati and her songs in modern Bangladesh and tells the story of their struggles and triumphs. It also describes what inspired the activists and singers to pursue this task. With a combination of semi-structured and in-depth interviews and observations, data was gathered. Using Thematic and Narrative analysis this thesis outlines the prevailing status of Chandrabati and her songs in modern Bangladesh. This thesis does not confine itself to the past and present. Bangladesh, since its birth as an independent country in 1971 has experienced many changes in its social, cultural, political and religious scenario. The attitude of people is also an ever-changing aspect in the modern world because of globalization and extensive use of technologies. Entertainment industry too has changed all over the world, offering too many options for the public. In this context, with careful observation of the social, cultural, religious changes that are taking place in Bangladesh, and also taking consideration of the natural tendency of Bangladeshis, this thesis tries to predict, as an old indigenous cultural aspect, how Chandrabati’s songs will be regarded in Bangladesh in the future

Impacts of Financial Control Mechanisms on Local Government Autonomy in Delta State

Abstract The paper discusses the impacts of Financial Control Mechanisms on Local Government Autonomy in Delta State, Nigeria, 1999 -200