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[null,"1.","Record Nr.",null,"UNINA9910163128103321"]
[null,null,"Titolo",null,"The enigma of the origin of Portolan charts : a geodetic analysis of the hypothesis of a medieval origin / / edited by Roel Nicolai"]
[null,null,"Pubbl/distr/stampa",null,"Leiden ; ; Boston : , : Brill, , 2016"]
[null,null,"ISBN",null,"90-04-28512-1"]
[null,null,"Descrizione fisica",null,"1 online resource (570 pages) : illustrations (some color), maps, charts"]
[null,null,"Collana",null,"History of science and medicine library ; ; v. 52"]
[null,null,"Disciplina",null,"623.89/22"]
[null,null,"Soggetti",null,"Nautical charts - History"]
[{"$nulls":4},"Navigation - History"]
[{"$nulls":4},"Cartography - History"]
[{"$nulls":4},"Electronic books."]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Bibliographic Level Mode of Issuance: Monograph"]
[null,null,null,"Nota di bibliografia","Includes bibliographical references and index."]
[null,null,"Nota di contenuto",null,"Preliminary Material -- 1 Introduction -- 2 Key Characteristics of Portolan Charts -- 3 Existing Hypotheses on the Origin and Construction Method of Portolan Charts -- 4 Cartometric Analysis; Methodology and Existing Research -- 5 Cartometric Analysis of Five Charts -- 6 The Relationship between Portolans and Portolan Charts -- 7 Constraints on Shipping and Navigation in the Medieval Mediterranean -- 8 The Map Projection, Artificial or Intentional? -- 9 Navigational Practices in the Twelfth and Thirteenth Centuries -- 10 An Arabic-Islamic Origin of Portolan Charts? -- 11 Conclusions -- 12 Synthesis -- Appendix A: The Historical Setting of the Emergence of Portolan Charts -- Appendix B: Calculation of the Length of a Rhumb Line -- Appendix C: The Plane Charting Examples from Chapter 2 -- Appendix D: Accuracy Model for Medieval Navigation -- Appendix E: Cartometric Analysis Details -- Appendix F: Reliability of the cals7k.2 Archaeomagnetic Model -- Appendix G: Is the Map Projection Accidental? A Statistical Analysis -- Appendix H: The Preface of the Liber de existencia riveriarum -- Bibliography -- Index."]
[null,null,null,"Sommario/riassunto","The sudden appearance of portolan charts, realistic nautical charts of the Mediterranean and Black Sea, at the end of the thirteenth century is one of the most significant occurrences in the history of cartography. Using geodetic and statistical analysis techniques these charts are shown to be mosaics of partial charts that are considerably more accurate than has been assumed. Their accuracy exceeds medieval "]
[{"$nulls":4},"mapping capabilities. These sub-charts show a remarkably good agreement with the Mercator map projection. It is demonstrated that this map projection can only have been an intentional feature of the charts’ construction. Through geodetic analysis the author eliminates the possibility that the charts are original products of a medieval Mediterranean nautical culture, which until now they have been widely believed to be."]
[null,"2.","Record Nr.",null,"UNINA9910629592503321"]
[null,null,"Autore",null,"Kruger Donnavan"]
[null,null,"Titolo",null,"Blended learning environments to foster self-directed learning / / Donnavan Kruger [and nine others]"]
[null,null,"Pubbl/distr/stampa",null,"[Place of publication not identified] : , : AOSIS, , 2022"]
[null,null,"Descrizione fisica",null,"1 online resource (344 pages)"]
[null,null,"Disciplina",null,"371.3"]
[null,null,"Soggetti",null,"Blended learning"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Sommario/riassunto","This book on blended learning environments to foster self-directed learning highlights the focus on research conducted in several teaching and learning contexts where blended learning had been implemented and focused on the fostering of self-directed learning. Several authors have contributed to the book, and each chapter provides a unique perspective on blended learning and self-directed learning research. From each chapter, it becomes evident that coherence on the topics mentioned is established. One of the main aspects drawn in this book, and addressed by several authors in the book, is the use of the Community of Inquiry (CoI) framework when implementing teaching and learning strategies in blended learning environments to foster self-directed learning. This notion of focusing on the CoI framework is particularly evident in both theoretical and empirical dissemination presented in this book. What makes this book unique is the fact that researchers and peers in varied fields would benefit from the findings presented by each chapter, albeit theoretical, methodological or empirical in nature - this, in turn, provides opportunities for future research endeavours to further the narrative of how blended learning environments can be used to foster self-directed learning."]