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4434ElectroSim 2.0: Interactive Simulations of Basic Electronic and Operational Amplifier Circuits
http://www.merlot.org/merlot/viewMaterial.htm?id=76018
Real-time, theory-based interactive simulations of some simple electronic circuits that look just like the schematic diagrams in textbooks, yet actually work and respond to changes just like the real circuits. Free download. Covers Ohm's Law, Series and parallel resistors, Wheatstone bridge, Half-wave and Full-wave DC power supply, Simple, Zener-regulated power supply, Transistor switch driving a relay, Common Emitter AC mplifier, Operational amplifiers, Adder (summing amplifier) Subtractor (Difference amplifier), Photodiode photometer, Integrator, Differentiator, Voltage follower with transistor, output current booster, Programmable current driver with transistor output current booster. For Macintosh or Windows PC with Mac emulator.S.P.E.C.T.R.U.M. (Signal Processing for Experimental Chemistry Teaching and Research/ University of Maryland)
http://www.merlot.org/merlot/viewMaterial.htm?id=76024
Free downloadable program for processing of "spectral" or time-series data (y values at equally-spaced x intervals), such as spectra, chromatograms, electrochemical signals, etc. The program enhances the information content of instrument signals, for example by reducing noise, improving resolution, compensating for instrumental artifacts, testing hypotheses, and decomposing a complex signal into its component parts. Includes reference manual and tutorial. For Macintosh or Windows PC with Mac emulator.Interactive Computer Models for Analytical Chemistry Instruction
http://www.merlot.org/merlot/viewMaterial.htm?id=76075
Free downloadable interactive spreadsheet-based computer models for students of Instrumental Analysis and Spectrochemical Methods. Includes student assignment handouts. The mathematical basis for each model, including cell definitions and equations, is described. Includes:Color Temperature of a Blackbody Source; Animated Diffraction Grating; Photomultiplier Light Measurement System; Error propagation in Analytical Calibration; Multiwavelength Spectrometry; Lock-in Amplifier; Wavelength modulation system; U.V.-Vis. Photometer; Dual Wavelength Spectrophotometer; Instrumental Deviations from Beer's Law; Scanning Fluorescence Spectrophotometer; Signal and Photon SNR of Atomic Emission Spectrometer; Effect of Slit Width on Signal-to-Noise-Ratio; Line Wing Overlap; Spectroscopy of Atomic Absorption.Retirement Investment and Income Simulation Spreadsheets
http://www.merlot.org/merlot/viewMaterial.htm?id=76030
Excel 5.0 spreadsheet simulations that demonstrate in a graphic and interactive manner the potential benefits of long-term investing. Free downloads. The Investment Simulation Spreadsheet simulates of saving and investing for retirement. It shows how much you can accumulate in a tax-deferred retirement account (e.g. an IRA or 401k account) over a 35-year period by saving a certain amount each year and investing it in a combination of fixed-interest or variable (equity) instruments. The Income Simulation Spreadsheet shows how much income you can withdraw from a retirement account (e.g. an IRA or 401k account) that is invested it in a combination of fixed-interest or variable (equity) instruments. Both of the simulations use a randon-number generator to simulate the fluctuation (volatility) in the investment returns of equities (stocks and stock mutual funds).