In chromatography a common problem is the correct quantification of overlapping peaks. Given that the two peaks are both at the baseline of the chromatogram, the separation of the two peaks (and the subsequent quantification) is performed by selecting the minimum between the two peaks as the separation line. While this approach is quite reliable if.
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Distance, time and velocity are an ideal means to understand the concept of derivation. By reducing the time interval until it becomes zero, the average velocity approaches the instantaneos velocity, which is equal to the first derivative of the distance (with respect to time). This simulation allows to experiment with different. Freeware download of Distance-Time-Velocity 1.0, size 545.26 Kb.

The correlation coefficient is one of the commonly used statistical measures. Despite its frequent use, the fact that the correlation coefficient shows a broad distribution if too few observations are used is not well-known. This problem becomes worst when using only three or four observations for calculating the correlation. For. Freeware download of Probability Density Function of the Correlation Coefficient 1.0, size 325.06 Kb.

Measures of location are a common and simple means to describe the location of a distribution (a "typical" value that best describes the univariate data). Among the most important measures of location are the mean, the mode, the median, and the trimmed mean. One particular aspect of these measures of location is the susceptibility to. Freeware download of Measures of Location 1.3, size 335.54 Kb.

A mass spectrometer is a device which can perform accurate chemical analysis (both quantitative and qualitative). Although there are several different technical implementations (sector field, quadrupole, time of flight) all of these devices are based on the same idea: the molecules under investigation are first broken up and then the type and the. Freeware download of MS Oscilloscope 1.1, size 335.54 Kb.

DataLab is a simple to use statistics package that offers a mixture of visualization methods, data editing capabilities, statistical and mathematical procedures. DataLab has been developed as a small but powerful tool for data manipulation and interpretation. The methods implemented in this package have been selected from a. Free download of DataLab 3.501, size 0 b.

The magnetic sector field is - among other principles such as electric quadrupole fields, or flight time measurements - one of the most often used principles for commerical mass spectrometers. The principle is easy to understand: a beam of accelerated ions is directed into a magnetic field whose orientation is perpenticular to the beam. The. Freeware download of Sector Field MS 2.1, size 398.46 Kb.

If we know the molecular weight of a substance we implicitely know the atomic composition of that substance - provided that the molecular weight is known to an accuracy which is sufficient to distinguish between molecules having the same nominal mass. To explain this, let's have a look at a very simple example: suppose we know that our. Freeware download of Molecular Formulas 1.1, size 272.63 Kb.

Bookshelf is a compact program that allows you to access an electronic library that contains various books. The library contains both scanned paper based books and newer works. One of the outstanding features of Bookshelf is the possibility to access both types of books in almost the same manner - scanned books can be provided with links. Free download of Epina Bookshelf 1.400, size 0 b.

Atomic spectra may be used to quantitatively determine more than 70 chemical elements. In order to be able to detect the atomic spectrum, the atoms or ions have to be separated from one another, i.e. the atoms have to be in a gaseous state. This can be achieved by massively heating the substances to be determined (typically the temperature is. Freeware download of Atomic Spectroscopy 1.0, size 335.54 Kb.

Fourier synthesis is nothing else than the summation of cosine and sine waves at different frequencies and amplitudes. For a signal of infinite duration, the Fourier spectrum is discrete and reduces to the summation of harmonics. The values of the coefficients are usually displayed as a line spectrum, where each line indicates the size of a. Freeware download of Fourier Synthesis 1.1, size 325.06 Kb.

The emission of radiation of a non-reflecting ideal black surface is defined by Planck's radiation law. It states that the emitted radiation power increases with increasing temperature and that the maximum of the radiated spectrum is shifted towards shorter wavelengths with rising temperature. The location (wavelength) of the maximum is described. Freeware download of Black Body 1.1, size 335.54 Kb.

SDL Knowledgease is a collection of programming topics designed to provide you with quick answers. The pack is easy to use and supports Borlands Delphi, Kylix and C++Builder. You can save time by searching this general database before reading forum posts or news groups messages. It currently contains about 4800 articles about programming. Free download of SDL Knowledgease 0.70, size 0 b.