A computer program written in BASIC II is described which allows the toxicity determination of industrial effluents to be calculated. Parameters of interest incorporated are LC50, 95% confidence intervals, intercept, ...
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A computer program written in BASIC II is described which allows the toxicity determination of industrial effluents to be calculated. Parameters of interest incorporated are LC50, 95% confidence intervals, intercept, logit slope, and correlation coefficient. Calcualtion of in-stream waste concentration to determine whether the particular effluent needs to be pretreated or not is also included in the program based on the Biomonitoring protocol prepared by NPDES (USA EPA, 1979). This program can be run on a microcomputer for routine studies.
A computer program for the HP-41 series calculator is presented which predicts the rotor shaft horsepower required for tandem-rotor helicopters to a given set of helicopter parameters and flight conditions. Three simp...
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A computer program for the HP-41 series calculator is presented which predicts the rotor shaft horsepower required for tandem-rotor helicopters to a given set of helicopter parameters and flight conditions. Three simplified analytical methods of calculating the induced power for tandem-rotor helicopters were explored during the development of the program and their effect on the total shaft horsepower required was compared to actual test data. These comparisons as well as size and complexity considerations were used in selecting the best method to be used. The program can be used in preliminary design analysis and as an educational tool where only an estimate of the actual shaft horsepower is required.
The short computer program described provides for rapid calculation of tumour and normal tissue distribution data for radiolabelled specific antibody and non-specific immunoglobulin in the nude mouse xenograft model. ...
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The short computer program described provides for rapid calculation of tumour and normal tissue distribution data for radiolabelled specific antibody and non-specific immunoglobulin in the nude mouse xenograft model. Results are displayed in convenient tabular form and also as a bar graph. Facilities for providing a hard copy of all results are installed within the program.
A computer program for nonlinear regression analysis is described. The program, SIMP, is written in BASIC for use with a wide range of microcomputers. The simplex algorithm is used to minimize the sum of the squared r...
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A computer program for nonlinear regression analysis is described. The program, SIMP, is written in BASIC for use with a wide range of microcomputers. The simplex algorithm is used to minimize the sum of the squared residuals around the fitted line, and the data can be weighted if required. The program is applicable to a wide range of pharmacological procedures requiring curve fitting, and the analysis of protein-binding data is given as an example.
A computer program to develop files of multiple choice questions for examination and teaching purposes is described. The program enables an examiner to prepare and modify up to 50 short answer questions with either a ...
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A computer program to develop files of multiple choice questions for examination and teaching purposes is described. The program enables an examiner to prepare and modify up to 50 short answer questions with either a single or multiple correct answer format, and allows one to review the students answers individually or collectively, updating the item discrimination and difficulty indices each time a student performs the test. It also provides the option of answering the question file with or without review of the correct answer and reference.
A computer program is described that facilitates systematic and unbiased sampling in morphometry. Input data are coordinates of the four corners of a section as displayed in the position indicators of the microscope s...
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A computer program is described that facilitates systematic and unbiased sampling in morphometry. Input data are coordinates of the four corners of a section as displayed in the position indicators of the microscope stage. Outputs are coordinate values in the form of a regular lattice that describes where to place the stage and perform the sampling on the section. In addition, some other data are provided by the program, such as total area of section, length of sides, etc. The program is written in BASIC but can be easily converted to other computer languages.
IL-2 activity is commonly estimated in cell culture supernantants by an IL-2-dependent cell proliferation assay. This method is both reproducible and sensitive. However, it often appears from the literature that stati...
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IL-2 activity is commonly estimated in cell culture supernantants by an IL-2-dependent cell proliferation assay. This method is both reproducible and sensitive. However, it often appears from the literature that statistical analysis of the titration data either is disregarded or, when performed, is based on statistically incorrect assumptions. The proposed method is based on the principle of biological assay by parallel lines as applied to probit analysis of quantitative responses. The procedure has been embodied in a simple and interactive computer program which automatically estimates the IL-2 concentration in the biological sample, in terms of U/ml, and provides its standard error and confidence limits. This program is also suitable for quantitative determination of other biologically active substances that show a sigmoid dose/response relationship.
The paper reports on a theoretical study of the two-Bragg-cell interferometric spectrum analyser system. This architecture offers an improvement in radio frequency (RF) dynamic range compared to that of the convention...
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The paper reports on a theoretical study of the two-Bragg-cell interferometric spectrum analyser system. This architecture offers an improvement in radio frequency (RF) dynamic range compared to that of the conventional power spectrum analyser. Bulkwave shear mode lithium niobate Bragg cells are assumed for the study together with shot noise limited detection by avalanche photodiodes. A theoretical model is presented which enables the temporal history of the intermediate frequency (IF) output on each channel of the detector array to be predicted. A time-domain model is employed in which the instantaneous Fourier transforms of the (Gaussian weighted) signal and reference waveforms are evaluated at intervals much less than theIFperiod. These are then coherently combined to simulate the heterodyne detection. A computer program based on this theory provides a realistic simulation of pulse responses, ringing and delay effects in theIFfilter, image and sidelobe levels, andIFbreakthrough due to the reference waveform. Results are presented for chirp, pseudonoise and Gaussian noise reference waveforms. It is concluded that for the detection ofRFpulses with durations as short as 100 ns, an instantaneous dynamic range of 50–55 dBrelative to rms noise should be achievable, for simultaneous signals.
The paper discusses the maintenance of both pumped storage and conventional hydro-electric plant in the United Kingdom, dealing specifically with the experiences of one Group of the North of Scotland Hydro-Electric Bo...
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The paper discusses the maintenance of both pumped storage and conventional hydro-electric plant in the United Kingdom, dealing specifically with the experiences of one Group of the North of Scotland Hydro-Electric Board. The types of hydro-electric plant considered are geographically well spread and are subject to a number of different hydraulic regimes. A computer program developed for the best utilisation of maintenance resources entitled ‘generation equipment maintenance’ (GEM) is introduced and discussed.
Thermoregulatory information is a frequently used parameter in both physiological and psychophysiological research. Specific software programs using accepted formulae are not readily available to the scientist as is t...
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Thermoregulatory information is a frequently used parameter in both physiological and psychophysiological research. Specific software programs using accepted formulae are not readily available to the scientist as is the hardware. The program described here uses the well-established physiological model by Burton, calculating mean skin temperature and mean body temperature. The primary goal of this microsoft Basic program is to aid the researcher through speed of execution and quantitative reliability. A few command alterations will allow this program to be used with most microcomputer systems currently available. The time saved using this program will greatly enhance the efficiency of the researcher's thermoregulatory data analyses.
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