1.

Record Nr.

UNINA9910452873603321

Autore

Fiedler Miroslav

Titolo

Matrices and Graphs in Geometry / / Miroslav Fiedler [[electronic resource]]

Pubbl/distr/stampa

Cambridge : , : Cambridge University Press, , 2011

ISBN

1-139-88657-6

1-107-38379-X

1-107-29917-9

0-511-97361-6

1-107-39865-7

1-107-39023-0

1-107-38735-3

1-107-39502-X

Descrizione fisica

1 online resource (viii, 197 pages) : digital, PDF file(s)

Collana

Encyclopedia of mathematics and its applications ; ; volume 139

Disciplina

516

Soggetti

Geometry

Matrices

Graphic methods

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Note generali

Title from publisher's bibliographic system (viewed on 05 Oct 2015).

Nota di bibliografia

Includes bibliographical references (p. [193]-194) and index.

Nota di contenuto

Matricial approach to Euclidean geometry -- Simplex geometry -- Qualitative properties of the angles in a simplex -- Special simplexes -- Further geometric objects -- Applications.

Sommario/riassunto

Simplex geometry is a topic generalizing geometry of the triangle and tetrahedron. The appropriate tool for its study is matrix theory, but applications usually involve solving huge systems of linear equations or eigenvalue problems, and geometry can help in visualizing the behaviour of the problem. In many cases, solving such systems may depend more on the distribution of non-zero coefficients than on their values, so graph theory is also useful. The author has discovered a method that in many (symmetric) cases helps to split huge systems into smaller parts. Many readers will welcome this book, from undergraduates to specialists in mathematics, as well as non-



specialists who only use mathematics occasionally, and anyone who enjoys geometric theorems. It acquaints the reader with basic matrix theory, graph theory and elementary Euclidean geometry so that they too can appreciate the underlying connections between these various areas of mathematics and computer science.

2.

Record Nr.

UNINA9910795565003321

Autore

Fademrecht Laura

Titolo

Action recognition in the visual periphery / / vorgelegt von Laura Fademrecht

Pubbl/distr/stampa

Berlin : , : Logos Verlag, , [2017]

©2017

ISBN

3-8325-9202-4

Descrizione fisica

1 online resource (143 pages)

Collana

MPI Series in Biological Cybernetics

Disciplina

612.8

Soggetti

Neurosciences

Visual pathways

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Note generali

PublicationDate: 20170331

Sommario/riassunto

Long description: Humans are social beings that interact with others in their surroundings. In a public space, for example on a train platform, one can observe the wide array of social actions humans express in their daily lives. There are for instance people hugging each other, waving to one another or shaking hands. A large part of our social behavior consists of carrying out such social actions and the recognition of those actions facilitates our interactions with other people. Therefore, action recognition has become more and more popular as a research topic over the years. Actions do not only appear at our point of fixation but also in the peripheral visual field. The current Ph.D. thesis aims at understanding action recognition in the human central and peripheral vision. To this end, action recognition processes have been investigated under more naturalistic conditions



than has been done so far. This thesis extends the knowledge about action recognition processes into more realistic scenarios and the far visual periphery. In four studies, life size action stimuli were used (I) to examine the action categorization abilities of central and peripheral vision, (II) to investigate the viewpoint-dependency of peripheral action representations, (III) to behaviorally measure the perceptive field sizes of action sensitive channels and (IV) to investigate the influence of additional actors in the visual scene on action recognition processes. The main results of the different studies can be summarized as follows. In Study I a high categorization performance for social actions throughout the visual field with a nonlinear performance decline towards the visual periphery was shown. Study II revealed a viewpoint-dependence of action recognition only in far visual periphery. In Study III large perceptive fields for action recognition were measured that decrease in size towards the periphery. And in Study IV no influence of a surrounding crowd of people on the recognition of actions in central vision and the visual periphery was shown. In sum, this thesis provides evidence that the abilities of peripheral vision have been underestimated and that peripheral vision might play a more important role in daily life than merely triggering gaze saccades to events in our environment.



3.

Record Nr.

UNIORUON00232431

Autore

MADARIAGA, Salvador : de

Titolo

On Hamlet / Salvador de Madariaga

Pubbl/distr/stampa

London, : Frank Cass, 1964

Edizione

[2nd ed]

Descrizione fisica

xiii, 145 p. ; 22 cm.

Disciplina

822.33

Soggetti

Shakespeare William

SHAKESPEARE WILLIAM "HAMLET" CRITICA

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia