With a population of 12.5 billion and relatively low economic, scientific and technical Industries did not adhere to a standard of environmental performance and environmental agencies lacked sufficient funds and authority to enforce environmental regulations Cities are the engines of economic growth. Unfortunately, cities in China are facing serious

NETWORK ECONOMIES Business network bamboo\network smuggling human trafficking chamber of commerce, untary- loca rotary, country club, etc Compulsory-belong to an organization. to survive or operate successfully e.g. accountant, bankers. Concept of networks ocially b inding ties hetween actors Global tribes- combination of ethnic

Introduction Frequency-selective fading is a dominant impairment in mobile communications Fading reduces receive signal-to-noise ratio and degrades the bit-error-rate(BER) Frequency selectivity of the channel, i. e, delay spread, induces inter-symbol interference(ISI) To combat frequency-selective fading

Multiple Access shared transmission medium a receiver can hear multiple transmitters a transmitter can be heard by multiple receivers the major problem with multi-access is allocating the channel between the users the nodes do not know when the other nodes have data to send Need to coordinate transmissions

Carrier Sense Multiple Access(CSMA) In certain situations nodes can hear each other by listening to the channel “Carrier Sensing CSMA: Polite version of Aloha Nodes listen to the channel before they start transmission Channel idle=> Transmit Channel busy = Wait (join backlog) When do backlogged nodes transmit? When channel becomes idle backlogged nodes attempt transmission with probability q=1 Persistent protocol, q=1 Non-persistent protocol,< 1

What is marketing? To attract and retain customers at a profit (Drucker, 1999) To establish, develop and commercialise long-term customer relationships so that the objectives of the parties involved are met (Gronroos, 1989)

College English 2 The Course Curricular Participants: First-year Students Majoring Time: 2/2001-6/2001 Second semester of the Academic Year 2000-2001 Teaching Material: College English (Revised edition, published by Shanghai Foreign Language Education Press) Major Task of This Semester Text Learning (nine units altogether) Learning to write English composition Integral Training: trying to improve the students' proficiency in reading, listening, and speaking

Contents PREFACE TO THE SECOND EDITION ACKNOWLEDGEMENTS 135 1 ORIGINS, GROWTH AND POTENTIAL OF DEHYDRATION Origins; Growth; Potential; Conclusions 2 FACTORY ORGANISATION

Alexander graham bell an inspired black-haired scotsman of twenty eight, on the eve of marriage, vibrant and alive to new ideas Alexander Graham bell. The Man who invented the Telephone A| xander graham be‖l 1847to1922

Introduction Although the world is large, man is able to live in only a small part of it. The atmosphere is only about eleven kilometers thick. The soil that supplies us with food is only about fifteen centimeters thick and man can live on only about one eighth of the world's surface. In the past two hundred years man has greatly changed his environment. Water has been given to deserts. Roads have been built across deserts and through forests