Описание: This important book helps school leaders let go of a "comfortable" mindset and enter a world of courageous conversations that examine and challenge the impact of racism and other forms of oppression on disciplinary patterns, instructional practices, and school policies.
Автор: Hunsberger, Bruce E. Название: Atheists ISBN: 1591024137 ISBN-13(EAN): 9781591024132 Издательство: Random House (USA) Рейтинг: Цена: 1930.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: According to polls, almost all Americans believe in God. So atheists naturally stand out as dissident nay-sayers, especially when challenging the use of "God" in the Pledge of Allegiance, or the display of religious symbols in public places. This book provides the scientific study of active atheists.
Автор: Hunsberger Bruce Название: Honey, the Movers Are Here ISBN: 1984533967 ISBN-13(EAN): 9781984533968 Издательство: Неизвестно Цена: 4137.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: When retired furniture mover/trucker Mitch Curtis is asked back to the struggling Browns Express for a days work, he ends up buying its old rusty truck and golden movers license. After years working for others, he sees a chance to have his own business and create a place where hed like to work: the coffeepot always on, the beer fridge filled for happy hour, and the customer not always right. Set several decades ago in a midsize city called Essick, Mitchs narrative focuses on his workers and the running of his business. The crew he attracts are not those men who make the world go round but the kind he has always been drawn to: the ones who do not go round but wobble on their cosmic axle. Held together by alpha male Jake, an ever-changing cast of characters enlivens the pages of this novel. Its tales are both humorous and poignant and often infuriating, documenting the secret lives of the movers.
Автор: Jahanmir Said, Hunsberger Andrew, Heshmat Hooshang Название: Design of Mechanical Beariings in Cardiac Assist Devices ISBN: 0791860426 ISBN-13(EAN): 9780791860427 Издательство: Mare Nostrum (Eurospan) Рейтинг: Цена: 12415.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Continuous flow, mechanical cardiac assist devices rely on a rotating impeller to aid the heart with blood flow. Like any other mechanical system, the rotating components of these devices require some form of load support that is provided by either mechanical or magnetic bearings. The goal of this monograph is to provide an overview of basic principles that are important for design and evaluation of mechanical bearings used in blood pumps, with a primary focus on mechanical bearings used in the second and third generation ventricular assist devices (VADs). A general introduction of some basic principles that are important for design of mechanical bearings is first provided. The basic function of lubricants is described and a brief introduction is provided for surface roughness and the concept of real area of contact. Different lubrication regimes (boundary, mixed and fluid film) are defined. Rheological properties of different types of fluids are described.In the boundary lubrication regime contact lubrication is controlled by the physical and chemical properties of thin films, whereas in the hydrodynamic lubrication regime only physical and rheological properties of the thick fluid films are important. Principles of hydrodynamic lubrication are described and different types of fluid film bearings are discussed. Reynolds Equation which is the fundamental base for fluid film lubrication is discussed and its application to the design of different types of bearings is explored. An example for the design of a blood lubricated thrust bearing is provided. Lubrication of contact bearings is described and some challenging is-sues such as contact damage are briefly introduced. Boundary lubrication with molecular films is described. Fundamental mechanisms of wear and damage formation as well as the use of hard ceramic materials to combat wear are described. Finally examples are provided for current assist devices where blood lubricated contact bearings or hydrodynamic bearings are used.
