structural calculations
71Construction estimating software — is computer software designed for contractors to estimate construction costs for a specific project. An estimator will typically use estimating software to estimate their bid price for a project, which will ultimately become part of a resulting… …
72Unemployment — World unemployment rates[1] as of January 2009[update] Unemployment (or …
73Earthquake engineering — is the study of the behavior of buildings and structures subject to seismic loading. It is a subset of both structural and civil engineering.The main objectives of earthquake engineering are: * Understand the interaction between buildings or… …
74Potential energy — This article is about a form of energy in physics. For the statistical method, see Potential energy statistics. Classical mechanics Newton s Second Law …
75Kalman filter — Roles of the variables in the Kalman filter. (Larger image here) In statistics, the Kalman filter is a mathematical method named after Rudolf E. Kálmán. Its purpose is to use measurements observed over time, containing noise (random variations)… …
76Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… …
77Numerical control — CNC redirects here. For other uses, see CNC (disambiguation). A CNC Turning Center …
78Molecular modelling — The backbone dihedral angles are included in the molecular model of a protein. Modelling of ionic li …
79Hypervalent molecule — A hypervalent molecule is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), the phosphate (PO43−) ion, chlorine …
80Electron crystallography — is a method to determine the arrangement of atoms in solids using a transmission electron microscope (TEM). Contents 1 Comparison with X ray crystallography 2 Radiation damage 3 Protein structures determined by electron crystallography …
