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Self-sustainability

Self-sustainability is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Self-sustainability rather than just read about it. In short: Self-sustainability and self-sufficiency are overlapping states of being in which a person, being, or system needs little or no help from, or interaction with others. Self-sufficiency entails the self being enough (to fulfill needs), and a self-sustaining entity can maintain self-sufficiency indefinitely.

Key takeaways

  • Self-sustainability belongs to mathematics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Self-sustainability to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Self-sustainability from memory before moving on to harder problems.

Reference excerpt

Self-sustainability and self-sufficiency are overlapping states of being in which a person, being, or system needs little or no help from, or interaction with others. Self-sufficiency entails the self being enough (to fulfill needs), and a self-sustaining entity can maintain self-sufficiency indefinitely. These states represent types of personal or collective autonomy. A self-sufficient economy is one that requires little or no trade with the outside world and is called an autarky.

Description Self-sustainability is a type of sustainable living in which nothing is consumed other than what is produced by the self-sufficient individuals. Self-sustainability is a comprehensive approach to sustainable living that extends beyond mere environmental responsibility to encompass economic independence, reduced reliance on major corporations, and minimizing environmental impact through personal actions. Examples of attempts at self-sufficiency in North America include simple living, food storage, homesteading, off-the-grid, survivalism, DIY ethic, and the back-to-the-land movement. Practices that enable or aid self-sustainability include autonomous building, permaculture, sustainable agriculture, and renewable energy. The term is also applied to limited forms of self-sustainability, for example growing one's own food or becoming economically independent of state subsidies. The self-sustainability of an electrical installation measures its degree of grid independence and is defined as the ratio between the amount of locally produced energy that is locally consumed, either directly or after storage, and the total consumption. Key self-sustainability practices include:

Going zero-waste Using energy-efficient appliances Recycling and using less water Growing your own food Producing renewable energy Improving mental and physical health Practicing financial responsibility A system is self-sustaining (or self-sufficient) if it can maintain itself by independent effort. The system self-sustainability is:

the degree at which the system can sustain itself without external support the fraction of time in which the system is self-sustaining Self-sustainability is considered one of the "ilities" and is closely related to sustainability and availability. In the economics literature, a system that has the quality of being self-sustaining is also referred to as an autarky.

Examples

Mental and Physical Health Self sustainability supports mental and physical well-being. When individuals are self sustaining, it creates a sense of autonomy which gives them purpose. Therefore, this kind of lifestyle can lead an individual to have more of a sense of competence and control, thus boosting both their mental and physical health. Research indicates that higher levels of depressive symptoms actually are associate with lower self sufficiency in daily life. Moreover, self-sufficiency has been linked to improve mental and physical health outcomes.

Political states Autarky exists whenever an entity can survive or continue its activities without external assistance. Autarky is not necessarily economic. For example, a military autarky would be a state that could defend itself without help from another country.

Labor According to the Idaho Department of Labor, an employed adult shall be considered self-sufficient if the family income exceeds 200% of the Office of Management and Budget poverty income level guidelines.

Peer-to-peer swarming In peer-to-peer swarming systems, a swarm is self-sustaining if all the blocks of its files are available among peers (excluding seeds and publishers).

Discussion

Self-sustainability and survivability Whereas self-sustainability is a quality of one's independence, survivability applies to the future maintainability of one's self-sustainability and indeed one's existence. Many believe that more self-sustainability guarantees a higher degree of survivability. However, just as many oppose this, arguing that it is not self-sustainability that is essential for survivability, but on the contrary specialization and thus dependence. Consider the first two examples presented above. Among countries, commercial treats are as important as self-sustainability. An autarky is usually inefficient. Among people, social ties have been shown to be correlated to happiness and success as much as self-sustainability.

Greenwashing When making switches towards a more sustainable life, it is important to take note of marketing strategies such as Greenwashing. Companies falsely present their products or practices as environmentally friendly. As more people become conscious of sustainability, some businesses take advantage by branding themselves with misleading terms like:

"All-natural" "Eco-friendly" "Non-toxic" "Earth-friendly"

See also Autarchism Cottagecore Eating your own dog food Five Acres and Independence Food sovereignty Homesteading Individualism Juche List of system quality attributes Localism Rugged individualism Self-help Tiny house movement Vegetable farming

Notes and references

External links

Media related to Self-sufficiency at Wikimedia Commons Foundation for Self-Sufficiency in Central America "Self-sustainability strategies for Development Initiatives: What is self-sustainability and why is it so important?"

Worked examples

Example 1 — a first encounter with Self-sustainability

Start with the simplest possible case. Write down what Self-sustainability claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Self-sustainability before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Self-sustainability ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Self-sustainability

In research
Self-sustainability appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Self-sustainability in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Self-sustainability is common in secondary-school and first-year university syllabi. It links to neighbouring topics Applied probability, Self-sustainability, so understanding it makes those chapters shorter.
In everyday life
Look for Self-sustainability outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Self-sustainability in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Self-sustainability means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Self-sustainability out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Self-sustainability in simple terms?

Self-sustainability and self-sufficiency are overlapping states of being in which a person, being, or system needs little or no help from, or interaction with others. Self-sufficiency entails the self being enough (to fulfill needs), and a self-sustaining entity can maintain self-sufficiency indefi…

Why does Self-sustainability matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Self-sustainability?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Self-sustainability.

Tags

  • Applied probability
  • Self-sustainability

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