Enhanced pulse propagation in non-linear arrays of oscillators

The propagation of a pulse in a nonlinear array of oscillators is influenced by the nature of the array and by its coupling to a thermal environment. For example, in some arrays a pulse can be speeded up while in others a pulse can be slowed down by raising the temperature. We begin by showing that an energy pulse (one dimension) or energy front (two dimensions) travels more rapidly and remains more localized over greater distances in an isolated array (microcanonical) of hard springs than in a harmonic array or in a soft-springed array. Increasing the pulse amplitude causes it to speed up in a hard chain, leaves the pulse speed unchanged in a harmonic system, and slows down the pulse in a soft chain. Connection of each site to a thermal environment (canonical) affects these results very differently in each type of array. In a hard chain the dissipative forces slow down the pulse while raising the temperature speeds it up. In a soft chain the opposite occurs: the dissipative forces actually speed up the pulse, while raising the temperature slows it down. In a harmonic chain neither dissipation nor temperature changes affect the pulse speed. These and other results are explained on the basis of the frequency vs energy relations in the various arrays

Herniectomie percutanée sous guidage scanner : 7 ans d?experience.

Objectifs: Relater notre expérience des herniectomies sous guidage scanner des conflits disco-radiculaires résistants au traitement médical et aux infiltrationsradio-guidées. Decrire les techniques, indications, contre-indications et limites de ces procédures. Matériels et méthodes: De janvier 2004 à janvier 2011, plus de 1000 herniectomies ont été réalisées dans notre institution. L'intervention se déroule en salle de scanner interventionnelavec arceau de scopie. Ce guidage permet de positionner le matériel d'extraction exactement dans la hernie discale. Résultats: Les herniectomies sont réalisées lorsque l'indication chirurgicale classique est posée . Le principe de l'intervention est similaire à la chirurgie standard , et consisteen une extraction du matériel nucléaire hernié sous-ligamentaire, mais sous anesthésie locale et percutané. Notre expérience confirme que cette procédure estune alternative mini-invasive très efficace dans les positions latérales et foraminales en raison de leur accès direct facile au scanner . Les résultats statistiquesdétaillés seront exposés. Conclusion: La herniectomie sous guidage scanner est une intervention tres efficace dans les conflits disco -radiculaires en particulier foraminaux. Elle est devenu en moinsde 7 ans dans notre institution l'intervention de première intention dans le traitement de la hernie foraminale résistante aux thérapeutiques médicales .

How a soybean plant develops,1982.

This special report from the Iowa State University Cooperative Extension Service, no. 53. is designed to aid those involved in soybean production to more fully understand how the soybean plant develops. The content is both basic and applied. The basic information explains soybean growth and development through one life cycle. Management guides pinpoint practices needed for optimum plant growth and production.

How a soybean plant develops,1985.

This revised special report from the Iowa State University Cooperative Extension Service, no. 53. is designed to aid those involved in soybean production to more fully understand how the soybean plant develops. The content is both basic and applied. The basic information explains soybean growth and development through one life cycle. Management guides pinpoint practices needed for optimum plant growth and production.

Iowa Truck Information Guide, July 2013-July 2014

The Iowa Department of Transportation and the offices of Motor Vehicle Enforcement, Vehicle and Motor Carrier Services, and Driver Services want to make your travels into and through our state safer, legal and less complicated. This book will address and clarify many of the rules and regulations concerning the operation of commercial vehicles in the State of Iowa. However, it is not possible to include every rule and regulation that may apply. If any questions exist, the reader is encouraged to contact other sources, including the agencies listed on pages 4 and 5 of this book.

Pieces of Iowa’s Past, January 16, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. January 16, 2008

Pieces of Iowa’s Past, January 16, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. January 30, 2008

Pieces of Iowa’s Past, January 23, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. January 23, 2008 THIS WEEK: Capitol Quotations

Pieces of Iowa’s Past, February 6, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. February 6, 2008 THIS WEEK: “War of the Rebellion”

Pieces of Iowa’s Past, February 13, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. February 13, 2008 THIS WEEK: “The Great Tornado of 1860”

Pieces of Iowa’s Past, February 20, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. February 20, 2008 THIS WEEK: “The Old Brick Capitol”

Pieces of Iowa’s Past, February 27, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. February 27, 2008 THIS WEEK: Tunnel of Progress

Pieces of Iowa’s Past, March 5, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. March 5, 2008 THIS WEEK: Panama Exposition

Pieces of Iowa’s Past, March 12, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. March 12, 2008 THIS WEEK: University of Iowa Historic “Income Fund

Pieces of Iowa’s Past, March 19, 2008

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. March 19, 2008 THIS WEEK: Historical Account of Iowa State University Staff and Enrollment and University of Northern Iowa Financial Reports