System
An assemblage of interrelated elements (or holons) comprising a unified whole. See holon.
Theme
A unifying framework that holds the overall design together. A set of symbols and/or meanings, associations, goals that serve to guide a design. E.g. The theme for this children’s playground is connection to nature (all elements aim to support that wherever possible).
Thermal buffering
Reduction in amplitude of temperature swings. Often the result of thermal mass. Usually allows a more productive and enjoyable living environment.
Thermal lag
The tendency for temperature change to have inertia. For example a stone exposed to sun will stay warm after exposure for time relative to its mass and specific heat (heat holding capacity). Both spaces in the landscape and the earth experience thermal lag as evidenced by later day microclimates in the landscape and hot July’s after the sun has reached its highest path in the sky.
Thermal mass
Heavy materials such as stone, water, earth that store incoming solar heat and re-radiate that heat during times of little/no solar gain. Typically an element in the southern area of a building or on the southern sides of a structure. Materials with the highest specific heat (ability to hold heat) such as water and stone are used for thermal mass. “Massing” of living environments is particularly important where temperature fluctuations are high.
Thermosiphon
The passive flow of heat through a system. Often called a convection loop. A powerful way to move heat through a building or landscape.
Time
The non-physical context which contains all processes and elements. The vessel wi