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World3 Nonrenewable Resource Sector
The World3 nonrenewable resource sector is the portion of the World3 model that simulates nonrenewable resources. The World3 model is a simulation of human interaction with the environment that was designed in the 1970s to predict population and living standards over the next 100 years. The nonrenewable resource sector of the World3 model was used to calculate the cost and usage rates of nonrenewable resources. In the context of this model, nonrenewable resources are resources that there are a finite amount of on Earth, such as iron ore, oil, or coal. This model assumes that regardless of how much money is spent on extraction, there is a finite limit for the amount of nonrenewable resources that can be extracted. Overview The model combines all possible nonrenewable resources into one aggregate variable, . This combines both energy resources and non-energy resources. Examples of nonrenewable energy resources would include oil and coal. Examples of material nonrenewabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Business Sector
In economics, the business sector or corporate sector - sometimes popularly called simply "business" - is "the part of the economy made up by companies". It is a subset of the domestic economy, excluding the economic activities of general government, of private households, and of non-profit organizations serving individuals. The business sector is part of the private sector, but it differs in that the private sector includes all non-government activity, including non-profit organizations, while the business sector only includes business that operate for profit. In the United States the business sector accounted for about 78 percent of the value of gross domestic product (GDP) . Kuwait and Tuvalu each had business sectors accounting for less than 40% of GDP . In systems of state capitalism, much of the business sector forms part of the public sector. In mixed economies, state-owned enterprises may straddle any divide between public and business sectors, allowing analysts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (aluminum in AmE, American and CanE, Canadian English) is a chemical element with the Symbol (chemistry), symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It has a great affinity towards oxygen, and Passivation (chemistry), forms a protective layer of Aluminium oxide, oxide on the surface when exposed to air. Aluminium visually resembles silver, both in its color and in its great ability to reflect light. It is soft, Magnetism, non-magnetic and ductility, ductile. It has one stable isotope, 27Al; this isotope is very common, making aluminium the twelfth most common element in the Universe. The radioactivity of Aluminum-26, 26Al is used in Radiometric dating, radiodating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ is small and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resource Economics
Natural resource economics deals with the supply, demand, and allocation of the Earth's natural resources. One main objective of natural resource economics is to better understand the role of natural resources in the economy in order to develop more sustainable methods of managing those resources to ensure their availability for future generations. Resource economists study interactions between economic and natural systems, with the goal of developing a sustainable and efficient economy. Areas of discussion Natural resource economics transdisciplinary field of academic research within economics that aims to address the connections and interdependence between human economies and natural ecosystems. Its focus is how to operate an economy within the ecological constraints of earth's natural resources.Encyclopedia of EarthArticle Topic: ecological economics/ref> Resource economics brings together and connects different disciplines within the natural and social sciences connecte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Economics Models
Economics () is the social science that studies the production, distribution, and consumption of goods and services. Economics focuses on the behaviour and interactions of economic agents and how economies work. Microeconomics analyzes what's viewed as basic elements in the economy, including individual agents and markets, their interactions, and the outcomes of interactions. Individual agents may include, for example, households, firms, buyers, and sellers. Macroeconomics analyzes the economy as a system where production, consumption, saving, and investment interact, and factors affecting it: employment of the resources of labour, capital, and land, currency inflation, economic growth, and public policies that have impact on these elements. Other broad distinctions within economics include those between positive economics, describing "what is", and normative economics, advocating "what ought to be"; between economic theory and applied economics; between rational ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calculation
A calculation is a deliberate mathematical process that transforms one or more inputs into one or more outputs or ''results''. The term is used in a variety of senses, from the very definite arithmetical calculation of using an algorithm, to the vague heuristics of calculating a strategy in a competition, or calculating the chance of a successful relationship between two people. For example, multiplying 7 by 6 is a simple algorithmic calculation. Extracting the square root or the cube root of a number using mathematical models is a more complex algorithmic calculation. Statistical estimations of the likely election results from opinion polls also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers. To ''calculate'' means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equation
In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign . The word ''equation'' and its cognates in other languages may have subtly different meanings; for example, in French an ''équation'' is defined as containing one or more variables, while in English, any well-formed formula consisting of two expressions related with an equals sign is an equation. ''Solving'' an equation containing variables consists of determining which values of the variables make the equality true. The variables for which the equation has to be solved are also called unknowns, and the values of the unknowns that satisfy the equality are called solutions of the equation. There are two kinds of equations: identities and conditional equations. An identity is true for all values of the variables. A conditional equation is only true for particular values of the variables. An equation is written as two expressions, connected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World3 Nonrenewable Resource Sector
The World3 nonrenewable resource sector is the portion of the World3 model that simulates nonrenewable resources. The World3 model is a simulation of human interaction with the environment that was designed in the 1970s to predict population and living standards over the next 100 years. The nonrenewable resource sector of the World3 model was used to calculate the cost and usage rates of nonrenewable resources. In the context of this model, nonrenewable resources are resources that there are a finite amount of on Earth, such as iron ore, oil, or coal. This model assumes that regardless of how much money is spent on extraction, there is a finite limit for the amount of nonrenewable resources that can be extracted. Overview The model combines all possible nonrenewable resources into one aggregate variable, . This combines both energy resources and non-energy resources. Examples of nonrenewable energy resources would include oil and coal. Examples of material nonrenewabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resource Consumption
Resource consumption is about the consumption of non-renewable, or less often, renewable resources. Specifically, it may refer to: * water consumption * energy consumption ** electric energy consumption ** world energy consumption * natural gas consumption/gas depletion * oil consumption/ oil depletion * logging/deforestation * fishing/overfishing * land use/ land loss or * resource depletion and * general exploitation and associated environmental degradation Measures of resource consumption are resource intensity and resource efficiency. Industrialization and globalized markets have increased the tendency for overconsumption of resources. The resource consumption rate of a nation does not usually correspond with the primary resource availability, this is called resource curse. Unsustainable consumption by the steadily growing human population may lead to resource depletion Resource depletion is the consumption of a resource faster than it can be replenished. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Per Capita Income
Per capita income (PCI) or total income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year. It is calculated by dividing the area's total income by its total population. Per capita income is national income divided by population size. Per capita income is often used to measure a sector's average income and compare the wealth of different populations. Per capita income is also often used to measure a country's standard of living. It is usually expressed in terms of a commonly used international currency such as the euro or United States dollar, and is useful because it is widely known, is easily calculable from readily available gross domestic product (GDP) and population estimates, and produces a useful statistic for comparison of wealth between sovereign territories. This helps to ascertain a country's development status. It is one of the three measures for calculating the Human Development Index of a country. Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.The elements are from different metal groups. See periodic table. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable (computer Science)
In computer programming Computer programming is the process of performing a particular computation (or more generally, accomplishing a specific computing result), usually by designing and building an executable computer program. Programming involves tasks such as anal ..., a variable is an abstract storage location paired with an associated symbolic name, which contains some known or unknown quantity of information referred to as a ''value (computer science), value''; or in simpler terms, a variable is a named container for a particular set of bits or :simple:Data_type, type of data (like Integer (computer science), integer, Floating-point arithmetic, float, String (computer science), string etc...). A variable can eventually be associated with or identified by a memory address. The variable name is the usual way to Reference (computer science), reference the stored value, in addition to referring to the variable itself, depending on the context. This separation of name and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World3
The World3 model is a system dynamics model for computer simulation of interactions between population, industrial growth, food production and limits in the ecosystems of the earth. It was originally produced and used by a Club of Rome study that produced the model and the book ''The Limits to Growth'' (1972). The creators of the model were Dennis Meadows, project manager, and a team of 16 researchers. The model was documented in the book ''Dynamics of Growth in a Finite World''. It added new features to Jay W. Forrester's World2 model. Since World3 was originally created, it has had minor tweaks to get to the World3/91 model used in the book ''Beyond the Limits'', later improved to get the World3/2000 model distributed by the Institute for Policy and Social Science Research and finally the World3/2004 model used in the book ''Limits to Growth: the 30 year update''. World3 is one of several global models that have been generated throughout the world (Mesarovic/Pestel Model, Baril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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