What are spherical harmonics (extensions of trigonometric functions to a sphere, related to circles as cross-sections)?

The circular economy establishes a more sustainable production and consumption model in which raw materials are kept longer in production cycles and can be used ... In a circular economy, products are reused. Products that cannot be reused are recycled by chemical or mechanical processes, or through biological processes ... A technique called circular breathing. When musicians practice circular breathing, they inhale through the nose while also blowing air out through the mouth. Minimises or eliminates the amount of raw material used across the infrastructure lifecycle or supply chain, thereby reducing the embodied carbon of ... Sep 14, 2023 ... The definition of circular procurement. Circular procurement is purchasing that applies the principles of the circular economy, i.e. that ... Circular fashion can be defined as clothes, shoes or accessories that are designed, sourced, produced, and provided with the intention to be used and circulate ... Oct 22, 2020 ... The Circular Supplies business model is defined as fully renewable, recyclable, or biodegradable resource inputs that serve as feedstock, or raw ... Instead of throwing away products at the end of their lives, the circular economy focuses on finding ways to reuse and recycle. This means less waste ends up in ... The principles of circular agriculture are as follows: Optimum use of land and resources to meet food needs; Production of priority food crops in the fields ... Jul 18, 2021 ... Circular questioning is a technique used in systemic family therapy to invite participants in a conversation to consider relational aspects of the topic being ...