The Case Of The Missing Zebra Stripes
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Author | : Patricia Daniels |
Publisher | : Time Life Medical |
Total Pages | : 72 |
Release | : 1992 |
Genre | : Juvenile Nonfiction |
ISBN | : 9780809499540 |
A collection of stories, poems, riddles, games, and hands-on activities focusing on the mathematical aspects of a trip to the zoo.
Author | : Sonia M. Helton |
Publisher | : John Wiley & Sons |
Total Pages | : 422 |
Release | : 1997-04-18 |
Genre | : Education |
ISBN | : 0876281315 |
This unique, time-saving resource for teachers offers lists of concepts, topics, algorithms, activities, and methods of instruction for every aspect of K-6 mathematics.
Author | : Tim Caro |
Publisher | : University of Chicago Press |
Total Pages | : 319 |
Release | : 2016-12-05 |
Genre | : Science |
ISBN | : 022641115X |
From eminent biologists like Alfred Russel Wallace and Charles Darwin to famous authors such as Rudyard Kipling in his Just So Stories, many people have asked, “Why do zebras have stripes?” There are many explanations, but until now hardly any have been seriously addressed or even tested. In Zebra Stripes, Tim Caro takes readers through a decade of painstaking fieldwork examining the significance of black-and-white striping and, after systematically dismissing every hypothesis for these markings with new data, he arrives at a surprising conclusion: zebra markings are nature’s defense against biting fly annoyance. Popular explanations for stripes range from camouflage to confusion of predators, social facilitation, and even temperature regulation. It is a serious challenge to test these proposals on large animals living in the wild, but using a combination of careful observations, simple field experiments, comparative information, and logic, Caro is able to weigh up the pros and cons of each idea. Eventually—driven by experiments showing that biting flies avoid landing on striped surfaces, observations that striping is most intense where biting flies are abundant, and knowledge of zebras’ susceptibility to biting flies and vulnerability to the diseases that flies carry—Caro concludes that black-and-white stripes are an adaptation to thwart biting fly attack. Not just a tale of one scientist’s quest to solve a classic mystery of biology, Zebra Stripes is also a testament to the tremendous value of longitudinal research in behavioral ecology, demonstrating how observation, experiment, and comparative research can together reshape our understanding of the natural world.
Author | : |
Publisher | : Time Life Medical |
Total Pages | : 72 |
Release | : 1992 |
Genre | : Juvenile Nonfiction |
ISBN | : 9780809499502 |
A collection of stories, poems, games, and activities, all focusing on food, introduce such basic mathematical skills as number awareness, addition, subtraction, and estimation.
Author | : Diane Thiessen |
Publisher | : |
Total Pages | : 372 |
Release | : 1998 |
Genre | : Education |
ISBN | : |
Some 500 trade books are reviewed and rated with a star system, and include indication of grade level (1-6) as well as indication whether they are single- or multiconcept. Some out-of-print titles are included because of their exceptional content. Entries are arranged by subject, e.g. early number concepts, number extension and connections, measurement, and geometry and spatial sense. Indexing is by author and title; a grade level index would have been useful. Published by the National Council of Teachers of Mathematics, 1906 Association Dr., Reston, VA 22091-1593. Annotation copyright by Book News, Inc., Portland, OR
Author | : Rose Arny |
Publisher | : |
Total Pages | : 1896 |
Release | : 1998-04 |
Genre | : American literature |
ISBN | : |
Author | : Stephen S. Willoughby |
Publisher | : |
Total Pages | : 666 |
Release | : 2002-07 |
Genre | : Juvenile Nonfiction |
ISBN | : 9780075796077 |
Author | : Sara Mark |
Publisher | : Time Life Medical |
Total Pages | : 72 |
Release | : 1993 |
Genre | : Education |
ISBN | : 9780809499700 |
Uses stories, poems, riddles, games, and hands-on activities, all related to various sports, to teach early math skills.
Author | : |
Publisher | : |
Total Pages | : 2318 |
Release | : 1994 |
Genre | : American literature |
ISBN | : |
A world list of books in the English language.
Author | : John Henry Hartman |
Publisher | : |
Total Pages | : 478 |
Release | : 1994 |
Genre | : Client/server computing |
ISBN | : |
Abstract: "This dissertation presents a new network file system, called Zebra, that provides high performance file access and is highly available. Zebra stripes file data across its servers, so that multiple servers may participate in a file access and the file access bandwidth therefore scales with the number of servers. Zebra is also highly available because it stores parity information in the style of a RAID [Patterson88] disk array; this increases storage costs slightly but allows the system to continue operation even while a single storage server is unavailable. Zebra is different from other striped network file systems in the way in which it stripes data. Instead of striping individual files (file-based striping), Zebra forms the data written by each client into an append-only log, which is then striped across the servers. In addition, the parity of each log is computed and stored as the log is striped. I call this form of striping log-based striping, and its operation is similar to that of a log-structured file system (LFS) [Rosenblum91]. Zebra can be thought of as a log-structured network file system: whereas LFS uses a log abstraction at the interface between a file server and its disks, Zebra uses a log abstraction at the interface between a client and its servers. Striping logs, instead of files, simplifies Zebra's parity mechanism, reduces parity overhead, and allows clients to batch together small writes. I have built a prototype implementation of Zebra in the Sprite operating system [Ousterhout88]. Measurements of the prototype show that Zebra provides 4-5 times the throughput of the standard Sprite file system or NFS for large files, and a 15-300% improvement for writing small files. The utilizations of the system resources indicate that the prototype can scale to support a maximum aggregate write bandwidth of 20 Mbytes/second, or about ten clients writing at their maximum rate."