The idea of mutual classification of spaces and mappings is one of the main research directions of point set topology. In a systematical way, this book discusses the basic theory of generalized metric spaces by using the mapping method, and summarizes the most important research achievements, particularly those from Chinese scholars, in the theory of spaces and mappings since the 1960s. This book has three chapters, two appendices and a list of more than 400 references. The chapters are "T...

This book is on mobile networks with the emphasis on mobile data services.Mobile Network Operators (MNOs) monetize the scarce wireless spectrum resource, generating revenue through the provision of mobile data services to their customers. The traditional mobile data service is a three-part tariff involving a monthly data quota. This kind of service lacks for flexibility seriously, since it rigidly dictates the usage of data based on time, location, and user identity, limiting when,...

'I am very impressed by Dharma Master Cheng Yen.'-- Thich Nhat Hanh'Dharma Master Cheng Yen is a role model for us all.'--Dalai LamaThe Thirty-Seven Principles of Enlightenment contains 7 parts: (1) The Four Right Efforts, (2) The Four Steps Towards Obtaining Supernatural Powers, (3) The Four Considerations, (4) The Five Roots, (5) The Five Strengths, (6) The Seven Factors of Wisdom, and (7) The Noble Eightfold Path. The Buddha reminded us to practice the Thirty-Seven Princ...