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The 2000-watt society concept, introduced in 1998 by the Swiss Federal Institute of Technology in Zurich (ETH Zurich), aims to reduce the average primary energy use of First World citizens to no more than 2,000 watts (equivalent to 2 kilowatt-hours per hour or 48 kilowatt-hours per day) by 2050, without compromising their standard of living.
The calculator described above was called "Model No. 1" . [6] Model 2 had scales on the inner cylinder for calculating logs and sines.The "Fuller-Bakewell" model 3 had two scales of angles printed on the inner cylinder to calculate cosine² and sine ⋅ cosine [note 1] for use by engineers and surveyors for tacheometry calculations.
The following table compares general and technical information for a selection of common and uncommon Texas Instruments graphing calculators. Many of the calculators in this list have region-specific models that are not individually listed here, such as the TI-84 Plus CE-T, a TI-84 Plus CE designed for non-French European markets.
A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.
In the early model PC-100A, a switch inside the battery charger compartment allows use with the earlier SR-52 and SR-56 calculators as well as the TI-58/59 series. In addition, it also works with non-programmable TI machines of the era such as the SR-50A. (Remove the battery pack of a TI calculator and look for the row of printer interface pads ...
WIEN2k works with both centrosymmetric and non-centrosymmetric lattices, with 230 built-in space groups. It supports a variety of functionals including local-density approximation (LDA), many different generalized gradient approximations (GGA), Hubbard models, on-site hybrids, meta-GGA and full hybrids, and can also include spin-orbit coupling and Van der Waals terms.
The team, led by Matthew Luzzetti, projects inflation could rise by roughly 0.5% in 2026 to about 2.5%, primarily due to the inflationary impact of tariffs.
BEE Star Label is a program run by the Indian government's Bureau of Energy Efficiency under Ministry of Power that promotes energy efficiency.The program provides information on the energy consumption of products and devices using different standardized methods.