Structure theory of vertex algebras

Organic materials with a high index of refraction (RI) are attracting considerable interest due to their potential application in optic and optoelectronic devices. However, most of these applications require an RI value of 1.7 or larger, while typical carbon-based polymers only exhibit values in the range of 1.3–1.5. This paper introduces an efficient computational protocol for the accurate prediction of RI values in polymers to facilitate in silico studies that an guide the discovery and design of next-generation high-RI materials. Our protocol is based on the Lorentz-Lorenz equation and is parametrized by the polarizability and number density values of a given candidate compound. In the proposed scheme, we compute the former using first-principles electronic structure theory and the latter using an approximation based on van der Waals volumes. The critical parameter in the number density approximation is the packing fraction of the bulk polymer, for which we have devised a machine learning model. We demonstrate the performance of the proposed RI protocol by testing its predictions against the experimentally known RI values of 112 optical polymers. Our approach to combine first-principles and data modeling emerges as both a successful and highly economical path to determining the RI values for a wide range of organic polymers.

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Capital Structure Theory and Retention Policy

SSRN Electronic Journal ◽

10.2139/ssrn.1915200 ◽

2011 ◽

Author(s):

Tsung-Kang Chen ◽

Mao-Wei Hung ◽

Hsien-Hsing Liao ◽

Ju-Fang Yen

Keyword(s):

Capital Structure ◽

Structure Theory ◽

Retention Policy ◽

Capital Structure Theory

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Governance and Capital Structure: Theory and Evidence from the CMBS Market

SSRN Electronic Journal ◽

10.2139/ssrn.2838597 ◽

2016 ◽

Author(s):

Timothy J. Riddiough ◽

Jun Zhu

Keyword(s):

Capital Structure ◽

Structure Theory ◽

Capital Structure Theory

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Where the Millennials Will Take Us

10.1093/oso/9780199324385.001.0001 ◽

2018 ◽

Cited By ~ 38

Author(s):

Barbara J. Risman

Keyword(s):

Young People ◽

Life Stage ◽

Structure Theory ◽

Theoretical Argument ◽

Individual Level ◽

Gender Categories ◽

The Individual ◽

New Research ◽

Fourth Wave

In this book Barbara J. Risman uses her gender structure theory to tackle the question about whether today’s young people, Millennials, are pushing forward the gender revolution or backing away from it. In the first part of the book, Risman revises her theoretical argument to differentiate more clearly between culture and material aspects of each level of gender as a social structure. She then uses previous research to explain that today’s young people spend years in a new life stage where they are emerging as adults. The new research presented here offers a typology of how today’s young people wrestle with gender during the years of emerging adulthood. How do they experience gender at the individual level? What are the expectations they face because of their sex? What are their ideological beliefs and organizational constraints based on their gender category? Risman suggests there is great variety within this generation. She identifies four strategies used by young people: true believers in gender difference, innovators who want to push boundaries in feminist directions, straddlers who are simply confused, and rebels who sometimes identify as genderqueer and reject gender categories all together. The final chapter offers a utopian vision that would ease the struggles of all these groups, a fourth wave of feminism that rejects the gender structure itself. Risman envisions a world where the sex ascribed at birth matters has few consequences beyond reproduction.

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