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1000 tulosta hakusanalla Hubert Mathieu

Information Theory, Evolution, and the Origin of Life

Information Theory, Evolution, and the Origin of Life

Hubert P. Yockey

Cambridge University Press
2005
sidottu
Originally published in 2005, Information Theory, Evolution and the Origin of Life presents an introduction to the use of information theory and coding theory in molecular biology. The genetical information system, because it is linear and digital, resembles the algorithmic language of computers. George Gamow pointed out that the application of Shannon's information theory breaks genetics and molecular biology out of the descriptive mode into the quantitative mode and Dr Yockey develops this theme, discussing how information theory and coding theory can be applied to molecular biology. He discusses how these tools for measuring the information in the sequences of the genome and the proteome are essential for our complete understanding of the nature and origin of life. The author writes for the computer competent reader who is interested in evolution and the origins of life.
The Syntax of German

The Syntax of German

Hubert Haider

Cambridge University Press
2010
sidottu
What do you know, if you know that a language has 'Object Verb' structure rather than 'Verb Object'? Answering this question and many others, this book provides an essential guide to the syntactic structure of German. It examines the systematic differences between German and English, which follow from this basic difference in sentence structure, and presents the main results of syntactic research on German. Topics covered include the strict word order in VO vs word order variation in OV, verb clustering, clause union effects, obligatory functional subject position, and subject-object asymmetries for extractions. Through this, a cross-model and cross-linguistic comparison evolves, highlighting the immediate implications for non-Germanic OV languages, and creating a detailed and comprehensive description of the syntactic differences that immediately follow from an OV type in contrast with a VO type like English. It will be of interest to all those interested in syntax and Germanic languages.
Angular Dependence of the Scattering of Metastable Helium Atoms in Helium and Neon
Abstract: Abbreviated introduction: This dissertation concerns the measurement of collision cross sections for the scattering of excited helium atoms in helium and neon as a function of the minimum angular resolution of the beam apparatus. Some of the helium atoms in gaseous helium are excited to both the 21S and 23S metastable states. An atomic beam of the helium atoms is then produced and allowed to enter a collision chamber in which a gas is introduced at low pressure (ca. 10-3 mm). The scattering of the metastable helium atoms in the beam is observed by measuring the electron current ejected by the excited atoms when they arrive at metal detector surfaces. Both elastic and inelastic collisions of the excited atoms take place. Since the method of detection is insensitive to particles in the ground state, there is no inter- ference from the normal atoms in the beam. Because of the two metastable atoms formed, a knowledge of the beam composition is necessary if one is to determine the individual cross sections. The beam composition has been determined by passing the beam Through an inhomogeneous magnetic field. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Angular Dependence of the Scattering of Metastable Helium Atoms in Helium and Neon" by Hubert Lyle Richards, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Angular Dependence of the Scattering of Metastable Helium Atoms in Helium and Neon
Abstract: Abbreviated introduction: This dissertation concerns the measurement of collision cross sections for the scattering of excited helium atoms in helium and neon as a function of the minimum angular resolution of the beam apparatus. Some of the helium atoms in gaseous helium are excited to both the 21S and 23S metastable states. An atomic beam of the helium atoms is then produced and allowed to enter a collision chamber in which a gas is introduced at low pressure (ca. 10-3 mm). The scattering of the metastable helium atoms in the beam is observed by measuring the electron current ejected by the excited atoms when they arrive at metal detector surfaces. Both elastic and inelastic collisions of the excited atoms take place. Since the method of detection is insensitive to particles in the ground state, there is no inter- ference from the normal atoms in the beam. Because of the two metastable atoms formed, a knowledge of the beam composition is necessary if one is to determine the individual cross sections. The beam composition has been determined by passing the beam Through an inhomogeneous magnetic field. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Angular Dependence of the Scattering of Metastable Helium Atoms in Helium and Neon" by Hubert Lyle Richards, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.