Computer A-scan

The system should support all the inspection types available in the PSP-3 P-scan, T-scan and Through Transmission, TOFD and A-scan. It should be possible to record data for all the inspection types simultaneously. The developments in computer hardware, in particular disk storage, during the last years have made it feasable to increase the emphasis on the A-scan recording modes. It has also been feasible to extend the P-scan format to include P-scan image storage in a full 3D format, that allows cross-section views to be generated off-line. 

The data are transmitted from the front end processor to the computer in digital form over an ethemet link. The data consist of ultrasonic data, either raw RF A-scans or data processed by the digital signal processor in the PSP-4. In addition to the ultrasonic data, scanner coordinates are transmitted over the ethemet link. 

The nurse obtains the vital signs at die time of the initial assessment to provide baseline data. The primary healtii care provider may order many laboratory and diagnostic tests, such as an electroencephalogram, computed tomographic scan, complete blood count, and hepatic and renal function tests to confirm the diagnosis and identify a possible cause of the seizure disorder, as well as to provide a baseline during therapy with anticonvulsants. 

All patients should have a brain computed tomography scan or magnetic resonance imaging scan to differentiate an ischemic stroke from a hemorrhagic stroke, as the treatment... 

The sample environment was filled with He gas to prevent the argon X-ray emission from air. Beam scanning, data acquisition, evaluation and the generation of elemental maps were controlled by a computer. Micro-PIXE measurements were performed with a scanning 2.5MeVH+ microbeam accelerated by the 3 MV single-end accelerator. The beam diameter was 1-2 pm, so that individual particles could be analysed. The beam current was < 100 pA and the irradiation time was about 3(M0 min. 

Massova, I. Kollman, P., Computational alanine scanning to probe protein-protein interactions a novel approach to evaluate binding free energies, J. Am. Chem. Soc. 1999,121, 8133-8143... 

Massova and P. A. Kollman, Computational alanine scanning to probe protein-protein... 

A Fourier transform infrared spectroscopy spectrometer consists of an infrared source, an interference modulator (usually a scanning Michelson interferometer), a sample chamber and an infrared detector. Interference signals measured at the detector are usually amplified and then digitized. A digital computer initially records and then processes the interferogram and also allows the spectral data that results to be manipulated. Permanent records of spectral data are created using a plotter or other peripheral device. 

Obtain an absorption spectrum of each of your standards, the unknown, and the control sample on a scanning UV-VIS spectrophotometer interfaced to a computer for data acquisition. Follow the instructions provided for your instrument and software. 

You will place your answers to the multiple-choice questions on a scan sheet. The scan sheet is computer graded. The computer counts the number of correct responses and subtracts one-fourth of the wrong answers. A blank response is neither right nor wrong. If N is the number of answers, the formula is ... 

The scan rate of the potential is usually in the range from 0.020 V s-1 to 100 V s"1. Until a few years ago the resulting current-potential curves were recorded with a normal X-Y recorder up to a scan rate of about 0.5 V s-1 for higher scan rates it was necessary to use an oscilloscope. Recently, however, the use of personal computers interfaced with the electrochemical apparatus has overcome most recording problems. 

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