Computer Hewlett-Packard

The modular HPLC system used in this study included the following components a Model IlOA Altex pump (Beckman Scientific Instruments) or a System 4 Series programmable pump (Perkln-Elmer Corporation), an In-line filter, a Model 773 variable-wavelength DV detector (Kratos Scientific Instruments) fitted with a 12 pL flow cell, a Model 600 Series autosampler with a nominal volume of 20 pL (Perkin Elmer Corporation) and a two channel recorder (Kipp and Zonen). The chromatographic data were processed with the aid of a Model 3357 laboratory computer (Hewlett-Packard). 

The polymer solutions with concentrations between 0.2 and 1.0 weight percent were injected by a dosing pump equipped with a variable speed drive. The polymer used was polyacrylamide SEPARAN AP45 (M = 4-5 xlO ). The pressure differences between pressure taps were measured with Philips differential pressure transducers (Model PD2), the outputs of which were connected to a computer (Hewlett Packard 1000) to enable direct analysis of the experimental data. 

Computer Hardware (11 Companies) Compaq Dell Fujitsu Siemens Computers Hewlett Packard Mitac Psion Sharp Electronics Sun Microsystems Tatung Tulip Xyratex... 

The Third Edition was prepared on an IBM-PC and the previous IBM files were converted into Macintosh files. These have now been reformatted on a Macintosh LC575 computer and all further data to complete the Fourth Edition were added to these files. The text was printed with a Hewlett-Packard 4MV -600dpi Laser Jet printer which gives a clearer resolution. 

Rt is ironic that such an intensely computational mathematical science as chaos theory owes much of its modern origin to calculations that were performed not on a large mainframe computer but rather a simple programmable pocket calculator, a Hewlett-Packard HP-65 Feigenbaum would explain years later that had the series of intermediate calculations not been carried out sufficiently slowly, it is likely that most of the key observations would have been missed [feigSOa]. 

Discrete area segments were conq)uted over four second time intervals during polymer elution and baseline corrections were made. The raw data were transferred to a Hewlett Packard HP9830 computer for evaluation and plotting. The following conditions were used to analyze the trimer samples and low MW fractions Sample concentration - lyg/yl Injection volume - 50yl Mobile phase - THF Flow rate - 2ml/min... 

Many computer and other IT device makers offer take-back programs even where not mandated by law. In the USA, Apple, Sony, Sharp, Mitsubishi, Samsung, Hewlett-Packard, Dell, LG, Lenovo, Panasonic, and Toshiba have free collection point or mail-in take-back programs of their products. Apple and Hewlett-Packard provide some form of payment for the value of the taken-back item. Other companies, Hitachi, Phillips, and Funai, do not now have take-backs [23]. 

A computer-controlled rheology laboratory has been constructed to study and optimize fluids used in hydraulic fracturing applications. Instruments consist of both pressurized capillary viscometers and concentric cylinder rotational viscometers. Computer control, data acquisition and analysis are accomplished by two Hewlett Packard 1000 computers. Custom software provides menu-driven programs for Instrument control, data retrieval and data analysis. 

The computer system for this laboratory consists of a single Hewlett Packard 1000 A-Ser1es minicomputer which 1s networked to an HP 1000 F-Ser1es host computer. The A-Serles computer was chosen because Its operating system (RTE-A) 1s real-time, multiuser and... 

Since the data base for this Instrument resides on the host HP 1000 computer, the experiment setup files must first be transferred from the local computer to the HOST computer. This 1s done using the Dowell Schlumberger local laboratory computer network and the Hewlett Packard DS/1000-IV networking software. The programmatic user interface to the network Is again accessed through the main menu program for the instrument. 

For the purpose of comparison all spectra taken from the literature were digitized by means of a Hewlett-Packard Digitizer (model 9864 A) on-line with a small computer (HP, model 9820) and replotted on a common scale (HP, model 9862 A). 

Pyrolysis-Gas Chromatography-Mass Spectrometry. In the experiments, about 2 mg of sample was pyrolyzed at 900°C in flowing helium using a Chemical Data System (CDS) Platinum Coil Pyrolysis Probe controlled by a CDS Model 122 Pyroprobe in normal mode. Products were separated on a 12 meter fused capillary column with a cross-linked poly (dimethylsilicone) stationary phase. The GC column was temperature programmed from -50 to 300°C. Individual compounds were identified with a Hewlett Packard (HP) Model 5995C low resolution quadruple GC/MS System. Data acquisition and reduction were performed on the HP 100 E-series computer running revision E RTE-6/VM software. 

Last not least, there is a great variety of proprietary lO-design software that has been developed at research facilities and university institutes. E.g., at the TU Delft the S-matrix oriented software Photonic CAD was established several years ago, an innovative 10 design framework based on Hewlett Packard s Microwave Design System. Actual academic work e.g. addresses modes of bent waveguides, BMS-3D" ° is a quite new bend mode solver of the IRE, Prague, or FDTD-schemes with non-uniform grids, a topic of special importance to improve computational efficiency when multi-scale feature sizes are requested, to name a few of recent tasks, only. 

Optical and FTIR instrumentation. Absorption spectra were taken on three instruments. A Hewlett Packard 8450 UV/Vis Spectrophometer was used for the visible region of the spectrum. This instrument was computer control led and used to measure standard absorption spectra as well as absorption difference spectra. A Cary 14 Spectrophotometer was used for the near IR region, and an IBM IR/90 Series... 

The Impedance Analyzer was controlled by a 9836 Hewlett-Packard computer which also controlled the time-tempe ture of the press. Measurements at frequencies from 5 to 5 x 10 Hz were taken at regular Intervals during the cure cycle and converted to the complex permittivity. Further details of the experimental procedure has been given elsewhere [10]. 

Spectra were simulated by a Burroughs 6800 mainframe computer at the University of Detroit and plotted on a Hewlett-Packard 7470A digital plotter. 

Computers are pervading all areas of our life and, in this same way, they are pervading all areas of chemical research. In flavor analysis, computers with their information analysis capabilities are a natural ally with separation science which is an information generator. Our laboratory has extensive experience with the Hewlett-Packard 3357 Laboratory Automation System. The specific hardware which we have is given in Table I. 

Guides to purchasing safer electronics have also been developed and made available to consumers. EPEAT, developed through an EPA-led collaboration, has been used to assess and make publicly available the environmental profile (Gold, Silver, Bronze) of computer equipment products. Individual computer manufacturers have also developed tools to distinguish safer products. Hewlett Packard s Eco Highlights... 

MINICOMPUTERS. The next step up is a minicomputer based integrator, which may service up to perhaps two to three dozen chromatographs simultaneously. Examples of this class are the 3352-B system of Hewlett-Packard and the PEP-2 system of Perkin-Elmer. The minicomputer may have multiple input/output devices to service two or more locations independently, and may make the computer available (through a language like BASIC) to do further calculations on chromatographic results or to do general laboratory calculations. 

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