Описание: The diamond is the hardest natural substance known. It is found in a type of igneous rock known as kimberlite. The diamond itself is essentially a chain of carbon atoms that have crystallised. The stones unique hardness is a result of the densely concentrated nature of the carbon chains. Like other igneous rocks, kimberlite was formed over the course of thousands of years by volcanic action that occurred during the formation of the earths crust. It is thought that diamonds were first discovered in India about 6,000 years ago in the riverbeds of the region. India was the only known source of the rocks for over a thousand years, until they were unearthed in Borneo around A.D. 600. During the Middle Ages, the diamond was overshadowed by some of the more colourful gems like the ruby and emerald. In the 18th century, diamond deposits were discovered in Brazil in small quantities, and later in Australia, Russia, and the United States. Block caving is the most commonly used method in excavating diamonds from kimberlite deposits. This method offers the highest yield and thus is the most cost effective. In the crushing operation, which occurs in the below-ground mining facilities, large chunks of kimberlite are broken up into more easily transportable segments. Diamonds will continue to be used in industry and hightechnology enterprises, but synthetically produced facsimiles -- first manufactured in 1953 -- may accomplish some of the tasks originally the exclusive province of the real stone. These "manufactured" gems have the same properties of hardness and durability, and while they will never be as popular as the real diamond for adomment purposes, they are well suited for industrial applications. This book provides comprehensive overview on origin, exploration, and history of diamond.
Автор: Le Minh Название: Drawn Together ISBN: 1484767608 ISBN-13(EAN): 9781484767603 Издательство: Little Brown Рейтинг: Цена: 2427.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The recipient of six starred reviews and the APALA Asian/Pacific American Award for Literature When a young boy visits his grandfather, their lack of a common language leads to confusion, frustration, and silence. But as they sit down to draw together, something magical happens-with a shared love of art and storytelling, the two form a bond that goes beyond words. With spare, direct text by Minh L and luminous illustrations by Caldecott Medalist Dan Santat, this stirring picturebook about reaching across barriers will be cherished for years to come. A Junior Library Guild selection Named a Best Book of 2018 by the Wall Street Journal, NPR, Smithsonian, Kirkus Reviews, School Library Journal, Booklist, the Bulletin of the Center for Children's Books, BookRiot, the New York Public Library, the Chicago Public Library-and many more
Автор: Minh Chi Ngo Название: Minerals, Metals and Sustainability ISBN: 1681176653 ISBN-13(EAN): 9781681176659 Издательство: Gazelle Book Services Рейтинг: Цена: 31876.00 р. Наличие на складе: Поставка под заказ.
Описание: Minerals, metals and sustainability inspects the utilisation of minerals and mineral products and the consequences for sustainability of the consumption of finite mineral resources and the wastes related with their manufacture and usage. It delivers a multi-disciplinary approach that incorporates the physical and earth sciences with the social sciences, ecology and economics. Nowadays, the use of minerals is common in everyday items such as toothpaste, eyeglasses and some life saving hospital equipments. With the growth of the mining industry and development of advanced extraction techniques, more areas are being identified and selected for extraction of minerals. Abandoned land mines, mining in open areas, drilling for all- all these activities, if unplanned and not environmently-friendly also affects human health. This has led to concerns regarding the impact that mining has on the ecological health of the region and the people living in the area. Different methods of mining have different impacts on the environment. Sustainable development is the need of the hour if we are to provide a secure future for future generations. The book should be of great valuable for practising engineers, geologists and scientists; professionals in government service in areas such as resources, environment and sustainability; and non-technical professionals working in the minerals industry or in sectors servicing the minerals industry.
Автор: Minh Chi Ngo Название: Designing the Coal Preparation Plant of the Future ISBN: 168117572X ISBN-13(EAN): 9781681175720 Издательство: Gazelle Book Services Рейтинг: Цена: 30094.00 р. Наличие на складе: Поставка под заказ.
Описание: Coal preparation plants are designed to clean impurities, such as soil, sand and rock from coal, to ready it for transportation to power plants and coking facilities for use in steel processing. Monitoring flow through the coal preparation process can be difficult as the coal is abrasive and can cause inaccuracies and maintenance issues for intrusive instruments. A Coal preparation plant generally use gravity process equipment to separate the refuse from the product (coal). Coal has a specific gravity between 1.35 and 1.5, while the refuse rock has a Specific Gravity of 2.1 to 2.3. Heavy Media is the most popular method of cleaning coarse sizes. Heavy media cyclones are being used more often for fines size fractions. Flotation is generally used to clean the -28 mesh size fraction, although spirals and heavy media cyclones have shown success in cleaning down to 100 mesh coal feed. Spirals are generally used for middling sizes. Modular Coal Preparation Plants (MCPP) prepares coal for a cleaner burning process, enhanced calorific value and cleaner emissions. MCPPs consist of several modules including a raw coal preparation (crushing and screening station), a coal feed and washing module (jigging and Heavy Medium cyclone) as well as a dewatering module. Designing the Coal Preparation Plant of the Future provides comprehensive overview on several current and future challenges that must be considered in the design and operation of coal preparation facilities. These challenges dictate that we constantly strive to improve plant. Coal Preparation Engineers are meeting this challenge of the future by designing large modem environmentally acceptable plants.
Автор: Tran Phuoc Thi Minh Название: Vietnamese Children`s Favorite Stories ISBN: 0804844291 ISBN-13(EAN): 9780804844291 Издательство: Tuttle Рейтинг: Цена: 2338.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: **Winner of Creative Child Magazine 2015 Book of the Year Award** **Winner of Moonbeam Children's Book Awards 2015 Gold Medal** This colorfully illustrated multicultural children's book presents Vietnamese fairy tales and other folk stories--providing insight into a rich literary culture. Vietnamese Children's Favorite Stories is a charming collection of fifteen tales as told by prominent storyteller Tran Thi Minh Phuoc. In it, Tran--Minnesota's first Vietnamese librarian and an active member of the Vietnamese-American community--recounts cherished folktales such as "The Story of Tam and Cam" (the Vietnamese version of Cinderella), "The Jade Rabbit," and "The Legend of the Mai Flower." They make perfect new additions for story time or bedtime reading. With beautiful illustrations by veteran artists Nguyen Thi Hop and Nguyen Dong, children and adults alike will be enchanted by Tran's English retellings. Stories in which integrity, hard work and a kind heart triumph over deception, laziness, and greed--as gods, peasants, kings and fools spring to life in legends of bravery and beauty, and fables about nature. The Children's Favorite Stories series was created to share the folktales and legends most beloved by children in the East with young readers of all backgrounds in the West. Vietnamese Children's Favorite Stories will keep Vietnam's folktales alive for them and the legions of young readers who enjoy multicultural children's books and stories set in faraway lands. Other multicultural children's books in this series include: Asian Children's Favorite Stories, Indian Children's Favorite Stories, Indonesian Children's Favorite Stories, Japanese Children's Favorite Stories, Singapore Children's Favorite Stories, Filipino Favorite Children's Stories, Favorite Children's Stories from China & Tibet, Chinese Children's Favorite Stories, Korean Children's Favorite Stories, Balinese Children's Favorite Stories..
In the first ever book devoted to a critical investigation of the personal style blogosphere, Minh-Ha T. Pham examines the phenomenal rise of elite Asian bloggers who have made a career of posting photographs of themselves wearing clothes on the Internet. Pham understands their online activities as “taste work” practices that generate myriad forms of capital for superbloggers and the brands they feature. A multifaceted and detailed analysis, Asians Wear Clothes on the Internet addresses questions concerning the status and meaning of “Asian taste” in the early twenty-first century, the kinds of cultural and economic work Asian tastes do, and the fashion public and industry’s appetite for certain kinds of racialized eliteness. Situating blogging within the historical context of gendered and racialized fashion work while being attentive to the broader cultural, technological, and economic shifts in global consumer capitalism, Asians Wear Clothes on the Internet has profound implications for understanding the changing and enduring dynamics of race, gender, and class in shaping some of the most popular work practices and spaces of the digital fashion media economy.
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