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1. |
Record Nr. |
UNIBAS000045438 |
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Autore |
Torti, Ettore |
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Titolo |
I silos per foraggi : note pratiche per agricoltori / Ettore Torti |
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Pubbl/distr/stampa |
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Torino [etc.] : <<G. B.>> Paravia, 1928 |
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Descrizione fisica |
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104 p., X p. di tav. : ill. ; 16 cm |
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Collana |
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Biblioteca agricola Paravia , Serie zootecnica |
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Disciplina |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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2. |
Record Nr. |
UNINA9910449939603321 |
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Autore |
Mumford David <1937-> |
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Titolo |
Indra's pearls : the vision of Felix Klein / / David Mumford, Caroline Series, and David Wright ; with cartoons by Larry Gonick [[electronic resource]] |
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Pubbl/distr/stampa |
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Cambridge : , : Cambridge University Press, , 2002 |
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ISBN |
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1-107-71306-4 |
0-511-05897-7 |
1-107-71268-8 |
0-511-06743-7 |
1-107-71814-7 |
0-511-06530-2 |
1-107-05005-7 |
0-511-15720-7 |
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Descrizione fisica |
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1 online resource (xix, 395 pages) : digital, PDF file(s) |
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Disciplina |
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Soggetti |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from publisher's bibliographic system (viewed on 05 Oct 2015). |
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Nota di contenuto |
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The language of symmetry -- A delightful fiction -- Double spirals and MoĢbius maps -- The Schottky dance -- Fractal dust and infinite words -- Indra's necklace -- The glowing gasket -- Playing with parameters -- Accidents will happen -- Between the cracks -- Crossing boundaries -- Epilogue -- Index -- Road map. |
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Sommario/riassunto |
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Felix Klein, one of the great nineteenth-century geometers, discovered in mathematics an idea prefigured in Buddhist mythology: the heaven of Indra contained a net of pearls, each of which was reflected in its neighbour, so that the whole Universe was mirrored in each pearl. Klein studied infinitely repeated reflections and was led to forms with multiple coexisting symmetries. For a century, these images barely existed outside the imagination of mathematicians. However, in the 1980s, the authors embarked on the first computer exploration of Klein's vision, and in doing so found many further extraordinary images. Join the authors on the path from basic mathematical ideas to the simple algorithms that create the delicate fractal filigrees, most of which have never appeared in print before. Beginners can follow the step-by-step instructions for writing programs that generate the images. Others can see how the images relate to ideas at the forefront of research. |
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3. |
Record Nr. |
UNINA9910886097403321 |
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Autore |
Xiao Zhenghong |
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Titolo |
Environment and Selection of Technology : The Historical Agrotechnical Geography of West China During the Qing Dynasty / / by Zhenghong Xiao |
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Pubbl/distr/stampa |
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Singapore : , : Springer Nature Singapore : , : Imprint : Springer, , 2024 |
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ISBN |
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Edizione |
[1st ed. 2024.] |
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Descrizione fisica |
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1 online resource (347 pages) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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China - History |
Human geography |
Cultural geography |
History of China |
Social and Cultural Geography |
Human Geography |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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Chapter 1. Environmental and Morphological Features of Agricultural Technology in West China during the Qing Dynasty -- Chapter 2. Agro-technological Geographical Features of the Loess Plateau during the Qing Dynasty -- Chapter 3. The Geographical Features of Agricultural Technology in Northwest China during the Qing Dynasty -- Chapter 4. Geographical Features of Agricultural Technology in Qinghai-Tibet Plateau in the Qing Dynasty -- Chapter 5. Geographical Features of Agricultural Technology in Southwest China during the Qing Dynasty -- Chapter 6. The Regional Imbalance and Spatial Interaction of Agro-technical Development in West China during the Qing Dynasty -- Chapter 7. The Selection of Agricultural Technology and the Elements of Eco-environment in West China during the Qing Dynasty -- Chapter 8. The Selection of Agricultural Technology and Social and Economic and Cultural Circumstances in West China during the Qing Dynasty. |
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Sommario/riassunto |
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This book makes an insightful investigation of historical agrotechnical geography in West China in the Qing Dynasty from the perspective of historical geography and the history of agricultural technology. This |
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study first divides West China into four regions, i.e., the Loess Plateau, Northwest China except the Loess Plateau, the Qinghai-Tibet Plateau, and Southwest China. Based on a systematic analysis of the geographical factors, such as heat, moisture, topography, soil, this study discusses the distribution and differentiation of the major technology types in these regions, ranging from the most primitive shifting cultivation and extensive cultivation to the most intensive cultivation, which are manifested in the crop structure and distribution, planting technology, water conservancy, tools, etc., as well as various combinations of these technologies. The diverse types and forms of technology and their specific combinations in different geographical spaces are mainly determined by the diverse environmental conditions, which embodies the multi-factor correlation between technology mode and geographical environment and the internal unity of regional agricultural technology mode. In addition to the relationship between agricultural technology and geographical factors, it also takes social-economic, religious, and other cultural factors as important parameters, which were unique in West China, and significantly influence the trend of agrotechnological development. Through this study, it constructs the basic theoretical framework of historical agrotechnical geography and enlarges the scope of historical geography studies. And, since the author chose West China in the Qing Dynasty as the research subject, which was characterized by significant diversity and complexity in terms of natural geographical factors and socio-economic circumstances like religion and customs, this study provides a typical case for in-depth understanding of West China, so it is still of great academic value and important practical significance for the development of West China today. |
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