Outlining a revolutionary reformulation of the foundations of perturbative quantum field theory, this book is a self-contained and authoritative analysis of the application of this new formulation to the case of planar, maximally supersymmetric Yang–Mills theory. The book begins by deriving connections between scattering amplitudes and Grassmannian geometry from first principles before introducing novel physical and mathematical ideas in a systematic manner accessible to both physicists and mathematicians. The principle players in this process are on-shell functions which are closely related to certain sub-strata of Grassmannian manifolds called positroids - in terms of which the classification of on-shell functions and their relations becomes combinatorially manifest. This is an essential introduction to the geometry and combinatorics of the positroid stratification of the Grassmannian and an ideal text for advanced students and researchers working in the areas of field theory, high energy physics, and the broader fields of mathematical physics.
Outlining a revolutionary reformulation of the foundations of perturbative quantum field theory, this book is a self-contained and authoritative analysis of the application of this new formulation to the case of planar, maximally supersymmetric Yang–Mills theory. The book begins by deriving connections between scattering amplitudes and Grassmannian geometry from first principles before introducing novel physical and mathematical ideas in a systematic manner accessible to both physicists and mathematicians. The principle players in this process are on-shell functions which are closely related to certain sub-strata of Grassmannian manifolds called positroids - in terms of which the classification of on-shell functions and their relations becomes combinatorially manifest. This is an essential introduction to the geometry and combinatorics of the positroid stratification of the Grassmannian and an ideal text for advanced students and researchers working in the areas of field theory, high energy physics, and the broader fields of mathematical physics.
Despite being awarded the Nobel Prize in literature in 1984, much of Czech poet Jaroslav Seifert's work has yet to be translated into English. Publication of Early Poetry will earn for Seifert well-deserved literary recognition. Seifert's poetry is strongly situated within the Czech literary tradition of Poetism, which evolved into a playful, lighthearted refuge from world history while maintaining an edge of social consciousness.
This book gives an insight into the evaluation of drought in Slovakia and provides an assessment of Normalized Difference Vegetation Index (NDVI) as a method suitable for an evaluation of drought in agricultural land. Dry seasons in the time series from 1960 to 2014 were determined according to the monthly Palmer Drought Severity Index (PDSI). The field research was carried out on 12 sites including western Slovakia, Prešov, Trnava and Nitra regions. Data collected from satellite imagery, climate data analyses and drought indices was analysed to determine the value of NDVI as an evaluation tool.
How amateur programmers in 1980s Czechoslovakia discovered games as a medium, using them not only for entertainment but also as a means of self-expression. Aside from the exceptional history of Tetris, very little is known about gaming culture behind the Iron Curtain. But despite the scarcity of home computers and the absence of hardware and software markets, Czechoslovakia hosted a remarkably active DIY microcomputer scene in the 1980s, producing more than two hundred games that were by turns creative, inventive, and politically subversive. In Gaming the Iron Curtain, Jaroslav Švelch offers the first social history of gaming and game design in 1980s Czechoslovakia, and the first book-length treatment of computer gaming in any country of the Soviet bloc. Švelch describes how amateur programmers in 1980s Czechoslovakia discovered games as a medium, using them not only for entertainment but also as a means of self-expression. Sheltered in state-supported computer clubs, local programmers fashioned games into a medium of expression that, unlike television or the press, was neither regulated nor censored. In the final years of Communist rule, Czechoslovak programmers were among the first in the world to make activist games about current political events, anticipating trends observed decades later in independent or experimental titles. Drawing from extensive interviews as well as political, economic, and social history, Gaming the Iron Curtain tells a compelling tale of gaming the system, introducing us to individuals who used their ingenuity to be active, be creative, and be heard.
Principles of Polarography is a revised and extended version of an original Czech edition that appeared in 1962 at the Publishing House of the Czechoslovak Academy of Sciences in Prague. Based on a one-term course of lectures for third-year students of chemistry at the Charles University it brings the fundamental results of more than forty years' research in the field of polarography. The book contains 22 chapters and opens with a discussion of the principles of polarography. This is followed by separate chapters on polarizable electrodes used in polarography; charging current; influence of the resistance of the electrolyte on polarographic curves; migration and diffusion-controlled currents; and equation of a reversible polarographic wave. Subsequent chapters deal with reversible processes controlled by diffusion of complex ions; reversible reduction of organic substances; deposition of mercury ions; irreversible electrode processes; applications of limiting currents; polarographic curves for the formation of semiquinones and dimers; and catalytic hydrogen currents.
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.