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The NEW HPE JL829A FlexNetwork 5140 EI Series switch is a reliable networking solution with high performance and flexibility. With its switching capacity of 176 Gbps, this switch ensures efficient data transmission within your network. It has a forwarding rate of 131 Mpps, allowing for fast packet processing.
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NEW HPE JL829A FlexNetwork 5140 EI Series 48x 1GB RJ45 4x 10GB SFP+ Switch
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4.3 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Consequence After Consequence
Format: Hardcover
"In Fourteen Hundred Ninety Two, Columbus Sailed The Deep Blue Sea" is a ditty sung by generations of school children. Most of those students learned and believed that Columbus was the only man in Europe who believed the world was round and proved it by sailing three ships west to find the East. In 1493, Charles C. Mann dismisses these legends and goes on to demonstrate that Columbus (or as he refers to him, Colon) and the other Europeans who sailed across the Atlantic in the 1400s and 1500s did far more than just discover a New World, they helped create a planet wide system in which people, plants, animals, and diseases travelled further and were linked in more ways than had ever before been possible. In other words, 1493 was the beginning point of a new age of globalization.
This is not a new theory. Alfred W. Crosby developed the term Columbian Exchange back in the 1970s to describe the changes that took place after 1492. Jared Diamond's Guns, Germs, and Steel and Collapse also detailed some of the consequences of the European "discovery" of the Americas. What makes Mann's new book so appealing is his ability to tell an engrossing story that ably explains how one consequence led to another, fundamentally changing society after society and helping to creat our modern world. This is global history at its best, jumping from Ming and Qing China's opulent but troubled societies to the fast growing but still relatively backwards European states to the myriad African and Native American cultures, all of them to be affected by the transfer of peoples, plants, diseases, and ideas. Mann has a keen eye for an appealing and informative anecdote which really details the consequences of seemingly small decisions, such as how the introduction of the sweet potato to China led to deforestation, or how the Little Ice Age was affected by the abandonment of the Native American practice of burning off underbrush in North American forests.
Its books like 1493, as well as Mann's earlier and equally excellent 1491, which make studying history so fascinating. I taught Advanced Placement World History to high school students for many years before retiring, and I regularly amused them (at least I hope I did) with many references to Jared Diamond and Alfred Crosby's ideas. With 1493 Charles C. Mann deserves equal recognition by global historians.
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Reviewed in the United States on August 19, 2011
★★★★★ 5
Mesmerizing; shows the butterfly effect in action
Format: Paperback
Charles Mann’s “1493” is about globalization and the Homogenocene epoch. Unlike the plenitude of other recent books about globalization, however, “1493” is about biological globalization rather than economic globalization. The book traces the results of the Columbian Exchange, with chapters devoted to tobacco, the earthworm, malaria, silver, potatoes and sweet potatoes, guano and rubber.
The book is in four parts, and is written in an accessible, non-academic style. I found the first three parts of the book, which cover the impact of the Columbian Exchange on the Atlantic, the Pacific and Europe, respectively, to be captivating. These parts of the book demonstrated the fascinating interconnectedness of all things in a globalized society (in other words the “butterfly effect”) – for example, how transporting the sweet potato to Western China led to population migrations from Eastern to Western China, deforestation and overflowing of the Yellow River. The general result of such biological globalization is the creation of the Homogenocene epoch, a term which Mann uses to describe the biological homogenization that has replaced biological diversity since the time of Columbus. In the first three parts of the book, Mann demonstrates how history, biology and chemistry are all interrelated, and how today’s world continues to be influenced by the Columbian Exchange.
I found the last part of the book to be less impressive than the first three parts. Part Four is called “Africa in the World,” but confusingly it is about South America, not Africa. Parts of it read more like travel writing than history. Still, the book deserves five stars for the first three thrilling parts, which successfully trace the mesmerizing history of various everyday biological substances.
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Reviewed in the United States on December 31, 2017
★★★★★ 3
There were periods I was on the edge of my seat. There were times I just wanted to the book to end.
Format: Paperback
I recently started reading at 40 years old to make up for a lot of wasted time and missed education. This is a very informative read, but that said, I had a hard time staying focused sometimes. He gets into a lot of the science pertaining to plagues, epidemics etc which is interesting and I am reluctant to list science as a con as I did learn, but frequently found myself scrolling through several pages just to get the main idea behind the historical part. There were periods that I was on the edge of my seat and there were times I just wanted to the book to end. 1491 was similar. Both useful books, but a bit challenging to follow along especially if you are only reading small amounts at at time like on break at work etc. It jumps around from S. America, N America and China all through the book. I would have preferred that each region be separated. I get that he had his reasons. I am glad I read both books, but I probably should have gone with more of an overview vs the more in-depth content in this. I do not regret reading both books however, and recommend if you already have a good knowledge of this subject and are just trying to learn a little more. I found the information about the slave trade, the most interesting and wasn't aware that the majority of slaves shipped over from Africa went to Mesoamerica and the Caribbean. I also did not realize that plague and sickness really enabled use of African slaves as they were not prone to malaria like the Europeans. There is also some good info about ancient China and also sliver and mercury mining with South American Indians which made the book worth it for me.
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Reviewed in the United States on March 7, 2023
★★★★★ 4
If you liked 1491, you'll like 1493
Format: Hardcover
I originally read the first edition of 1491, which I loved. So that's why I ordered 1493. At about the same time 1493 arrived, I found out there was a new, revised version of 1491, which my husband bought from another source. So I re-read it at the same time I read 1493 for the first time. The reason I mention this is that there are some similarities between the revised version of 1491 and the newer book, 1493 - actually some repeated material. That's ok, as the author is taking the premise of 1491 another step further. Essentially, 1491 focuses on what new studies show was really going on in the Western Hemisphere before Columbus' arrival, where native peoples were far more numerous and had more advanced cultures than Europeans previously thought possible. In 1493, Charles Mann shows not only how Columbus and Europeans changed the New World, but how the "Columbian exchange" wrought great changes in the other direction as well. And he pulls in the further exchanges with Asia, to show the trans-global linkages of the phenomenon. So, some of his exposition gets a little repetitious, but overall he's an engaging writer, and for those of us who love the history of cultural exchanges and first contact, these books are mandatory reading!
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Reviewed in the United States on October 5, 2011
★★★★★ 5
Truly worth every penny. DS2r?
Format: Hardcover
Truly incredible documentation of the thoughtful work of a handful of artists. I'm hoping that by supporting this book we may inch ourselves closer to a Dead Space 2 remake lead by Motive studio. This book is a must for fans or the game and horror in general. Well made, good quality images, lore drops, developer letters. Its fantastic!
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Reviewed in the United States on May 15, 2025
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