By applying a difference-in-differences analysis to maize adoption in China from 1600 to 1910, we find that cultivation of this New World crop failed to raise per capita income. While maize accounted for a nearly 19 % increase in the Chinese population during 1776–1910, its effect on ...
A second world-wide migration and population displacement of Phytophthora infestansl 来自 Semantic Scholar 喜欢 0 阅读量: 1 作者: W G.摘要: L J, SPIELMAN*, A, DRENTHt, L, C, DAVIDSEJ, L. J, SUJKOWSKI§, W. GU*, P, W, TOOLEY' and W. E, FRY* *Department of Plant Pathology, ...
A world population growth model: in- teraction with Earth's carrying capacity and technol- ogy in limited space. Technological Forecasting and Social Change 2014; 82:34-41.Taagepera, R., 2014. A world population growth model: interaction with earth's carrying capacity and technology in ...
It was half the 1974 number in 1927, the year of the first transatlantic phone service. We numbered a mere billion in 1804 the year Napoleon Bonaparte was proclaimed Emperor of France. It had taken from 1600 to Napolean’s time for the estimated world population to have doubled to...
It studies the input dataset and prints a figure about how the world population evolved in the given region as a function of time. The analysis code can be seen by browsing the above notebook. 3. Compute environment In order to be able to rerun the analysis even several years in the fut...
The Department works in thr... A Tables 被引量: 1600发表: 2011年 World Population Prospects: The 2010 Revision (E.12.Xiii.10) World population prospects : the 2010 revision Department of Economic and Social Affairs, Population Division United Nations, 2011 v. 1 Comprehensive tables United ...
The world's largest cities today fall under a class that researchers call "megacities," with a population of over 10 million people. Learn a bit more about these massive settlements, how they rank by population, and how we got our rankings.
Cancel Create saved search Sign in Sign up Reseting focus {{ message }} linuxhw / DevicePopulation Public Notifications You must be signed in to change notification settings Fork 2 Star 23 Population of PCI devices in the world License CC-BY-4.0 license ...
Correctional Officers and Their Perceptions of Homosexuality, Rape, and Prostitution in Male Prisons SETTING: Baltimore, Maryland. OBJECTIVE: To describe a tuberculosis (TB) outbreak among a highly mobile population and the efforts required to control it. ... EIGENBERG,H.,M. - 《Prison Journal》...
A team ofscientistsbuilt a model using this information, as well as data about the global population, air travel networks, how people move around in communities, country preparedness levels, and how people might respond to pandemics. The model generated hundreds of thousands of virtual pandemics. ...