to calibrate in absolute units
21The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …
22Minkowski diagram — In the theory of relativity each observer assigns the event at A to a different time and location. The Minkowski diagram was developed in 1908 by Hermann Minkowski and provides an illustration of the properties of space and time in the special… …
23National Physical Laboratory, India — The National Physical Laboratory of India, situated in New Delhi, is the measurement standards laboratory of India. It maintains of SI units in India and calibrates the national standards of weights and measures History of measurement systems in… …
24Time zone — Timezone and TimeZone redirect here. For other uses, see Time zone (disambiguation). Local time redirects here. For the mathematical concept, see Local time (mathematics). This article is about time zones in general. For a list of time zones by… …
25Embodied energy — is defined as the sum of energy inputs (fuels/power, materials, human resources etc) that was used in the work to make any product, from the point of extraction and refining materials, bringing it to market, and disposal / re purposing of it.… …
26Dendrochronology — Drill for dendrochronology sampling and growth ring counting Dendrochronology or tree ring dating is the scientific method of dating based on the analysis of patterns of tree rings. Dendrochronology can date the time at which tree rings were… …
27Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …
28Severn Valley Railway — Heritage Railway name = Severn Valley Railway locale = Bewdley, Worcestershire terminus = Bridgnorth, Shropshire linename = Severn Valley Line builtby = Great Western Railway originalgauge = RailGauge|ussg preservedgauge = RailGauge|ussg operator …
29Molecular clock — Part of a series on Evolutionary Biology …
30Nondestructive testing — or Non destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage.[1] The terms Nondestructive examination (NDE),… …
