Grandfather Clocks for Home

Time and Definitions of Time:

International System of Units:
The International System of Units (SI) is the contemporary form of the metric system. (It is said to be based on seven ‘base units’ along with and is generally a system of units of measurement devised around seven base units and the number ten. Sorry, but I cannot seem to remember the seven base units. If you want to know the seven base units, they are easy to research online.)

This system of measurements is widely used around the world. Science and commerce both use the units of measurement identified and defined by the International System of Units. [This organization is abbreviated SI from the French title, ‘Système international d'unités’] SI having been created in 1960 is formed from the metre-kilogram-second system. This organization does not stand still. Definitions of Time are updated, and new units of measure created as technology and measurements improve. “The system has been nearly globally adopted. Three principal exceptions are the United States, Liberia and Myanmar (Burma). The United Kingdom has officially adopted metrication, but not with the intention of replacing customary measures entirely. Canada has adopted it for all legal purposes but imperial/US units are still in use, particularly in the buildings trade.” Quote from Wikipedia

Natural philosophy or the Philosophy of Nature:
Natural philosophy and the philosophy of nature are terms that have been historically applied to the study of nature, and our physical universe. The study of nature and the universe predates our understanding of today’s modern science. It is literally known as the forerunner of the natural sciences, even physics.

Operational Definition:
In simplified terms, an operational definition defines an activity or object in terms of a process, or set of tests (validation tests). These tests are used to determine presence and quantity. In other words, we can use a process to define object and actions, etc. I understand that the phrase was ‘coined’ by Percy Williams Bridgman. It is part of his theoretical processes of operationalization. To create a clear picture of operational definitions, think about weighing a bar of lead. The weight of this bar of lead is defined in terms of the numbers (pounds, kilograms, grams, etc.). We can operationally determine the weight of this bar of lead by placing it on a scale that has a standard calibration. So, the operational definition of the weight of this bar of lead results from following a weight measuring procedure. This ‘operational procedure’ can be repeated by anyone; it is replicable.

Sequence:
A sequence is an ordered list of objects, events, actions, operations, etc. A sequence includes members (member of a sequence can also be called elements or terms. The number of of members can be infinite. The string of members in a sequence is called ‘the length of the sequence.’ In a sequence the order of the member matters, because the same members can appear in a sequence many times in differing places. If we look at the following sequence of letters (members) [X, Y, Z, Q, P], we can easily see that the sequence differs from this one [X, Y, P, QZ]. So, thinking of formulas, recipes, a production line, it is clear that in a sequence the position of each member in that sequence can matter greatly. Without getting too complicated, here are two clarifying terms. Finite or limited sequences are sometimes known as strings. Infinite or unlimited sequences are known as streams.

So all this put together is used in measuring time, and definitions of time.