A manipulator, or 'robot', consists of a series of bodies (links) connected by joints to form a spatial mechanism. Usually the links are connected serially to form an open chain. The joints are either revolute (rotary) or prismatic (telescopic), various combinations of the two giving a wide va riety of possible configurations. Motive power is provided by pneumatic, hydraulic or electrical actuation of the joints. The robot arm is distinguished from other active spatial mechanisms by its reprogrammability. Therefore, the controller is integral to any de scription of the arm. In contrast with many other controlled processes (e. g. batch reactors), it is possible to model the dynamics of a ma nipulator very accurately. Unfortunately, for practical arm designs, the resulting models are complex and a considerable amount of research ef fort has gone into improving their numerical efficiency with a view to real time solution [32,41,51,61,77,87,91]. In recent years, improvements in electric motor technology coupled with new designs, such as direct-drive arms, have led to a rapid increase in the speed and load-carrying capabilities of manipulators. However, this has meant that the flexibility of the nominally rigid links has become increasingly significant. Present generation manipulators are limited to a load-carrying capacity of typically 5-10% of their own weight by the requirement of rigidity. For example, the Cincinatti-Milicron T3R3 robot weighs more than 1800 kg but has a maximum payload capacity of 23 kg.
Louisiana Fiddlers shines light on sixty-two of the bayou state's most accomplished fiddlers of the twentieth century. Author Ron Yule outlines the lives and times of these performers, who represent a multitude of fiddling styles including Cajun, country, western swing, zydeco, bluegrass, Irish, contest fiddling, and blues.Featuring over 150 photographs, this volume provides insight into the fiddlin' grounds of Louisiana. Yule chronicles the musicians' varied appearances from the stage of the Louisiana Hayride, honky tonks, dancehalls, house dances, radio and television, and festivals, to the front porch and other more casual venues. The brief sketches include observations on musical travels, recordings, and family history.Nationally acclaimed fiddlers Harry Choates, Dewey Balfa, Dennis McGee, Michael Doucet, Rufus Thibodeaux, and Hadley Castille share space with relatively unknown masters such as Mastern Brack, Cheese Read, John W. Daniel, and Fred Beavers. Each player has helped shape the region's rich musical tradition.
Here is expert guidance on one of the most vexing clinical challenges faced by interventional cardiologists. Written by global thought leaders in the area and edited by two internationally-recognized pioneers in interventional cardiology, Bifurcation Stenting covers all techniques, imaging modalities, and devices in current use, including VH-IVUS and OCT. It includes practical tips/tricks from leading experts and a section of challenging cases to further illustrate the material and help readers better understand the treatment of bifurcation lesions.
This will help us customize your experience to showcase the most relevant content to your age group
Please select from below
Login
Not registered?
Sign up
Already registered?
Success – Your message will goes here
We'd love to hear from you!
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.