FLOPPY

Changing the DSP software requires only one floppy disk. 

As all software is PC based, updating it is very easy one floppy disk or a CDROM is necessary. 

Also a very important the instrument may be adapted to a customer s needs by only changing software, and handing a floppy disk to the customer. Even better, the customer himself can download the software from our server, using a modem or the Internet. 

Bade Z and Light J C 1986 Highly exdted vibrational levels of floppy triatomic molecules—a discrete variable representation—distributed Gaussian-basis approach J. Chem. Phys. 85 4594... 

One of the motivations for studying Van der Waals complexes and clusters is that they are floppy systems with similarities to the transition states of chemical reactions. This can be taken one stage further by studying clusters that actually are precursors for chemical reactions, and can be broken up to make more than one set of products. A good example of this is H2-OH, which can in principle dissociate to fonn either H2 + OH or H2O + H. Indeed, dissociation to H2 O -t H is energetically favoured the reaction H2 + OH—> H2 O -t H is exothennic by about 5000... 

The spectra of floppy molecules such as Lij may therefore have different interpretations. For example, the spectra of specific symmetries have been fitted [11] to within a few percent of error by using the simple vibrational normal mode formula... 

I,argc am plitudc (floppy) vibi aLion al tit odes ofLeti exli ihit sign ifi-can t an h arm on ieity that tn ay increase errors in com pti ted freqticn -cies. In addition to an h armon icily, usually Lh ere is coiiplin g between vibrational modes. 

Certainly not. Input File 10-1 was written using the DOS editor and saved on a 3.5" floppy disk. You can write your input files at home on a laptop if you like, and then run them when your GAUSSIAN is not otherwise in use. Use. g jf (gaussian job file) as your file extension. If your editor gives the. txt extension or some such, use the rename command in DOS. If you run your file directly from the a drive, the output will be stored... 

Exees - This folder (direetory) eontains all the exeeutables as well as the basis set library file aeeessed by the "integral" exeeuta ble (BasisEib). The exeeutables are stored as a self-extraeting arehive file. The exeeutables require about 1.3 Mbytes and eannot be held onee extraeted on a floppy disk (therefore eopy the files to a "hard drive" before extraeting. ..). 

Large amplitude (floppy) vibrational modes often exhibit significant anharmonicity that may increase errors in computed frequencies. In addition to anharmonicity, usually there is coupling between vibrational modes. 

The user can input commands through a computer program (software), which the central processor will carry out. These programs reside in memory, usually on a disk (either hard or floppy) rather than the processor s own memory banks. 

The most important mass memories use magnetic media in the form of magnetic tapes or disks (floppy disk and hard disk). Laser addressed optical mass memories are of increasing commercial importance. 

There is no competitive situation for data storage disks with embossed iaformation (CD-ROM) and recordable/nonerasable disks (WORM) no counterpart to CD-ROM and WORM exists among magnetic memories. EOD drives are best compared to floppies and removable hard disk media given their possibiUty of easy and problem-free disk exchange and a capacity on the order of that of removable magnetic media (Tape, Bernoulli, SyQuest). 

Magnetooptic Materials. The appHcation of magnetooptic effects to optical memory systems, such as for laser beam writing and magnetooptic read, has been the subject of much research. Magnetooptic storage media offer the potential of storing over 120 Mbit/cm of information without contact of the read/write head which would thus be very competitive to floppy disks and tape. 

There is also a growing number of specialized databases available on specific topics such as CEC Replacement, effluents and pesticides, environmental chemical data, etc. These are usually on CD-ROM or floppy disk (3). 

Enified Numbering System for Metals and Alloys, SAE HE 1086 or ASTM DS-56A, 5th ed., 1989 Also available in electronic form on floppy disk. 

Materials respond to stress by straining. Under a given stress, a stiff material (like steel) strains only slightly a floppy or compliant material (like polyethylene) strains much more. The modulus of the material describes this property, but before we can measure it, or even define it, we must define strain properly. 

A comparison of these predicted values of E with the measured values plotted in the bar-chart of Fig. 3.5 shows that, for metals and ceramics, the values of E we calculate are about right the bond-stretching idea explains the stiffness of these solids. We can be happy that we can explain the moduli of these classes of solid. But a paradox remains there exists a whole range of polymers and rubbers which have moduli which are lower - by up to a factor of 100- than the lowest we have calculated. Why is this What determines the moduli of these floppy polymers if it is not the springs between the atoms We shall explain this under our next heading. 

Many of the most floppy polymers have half-melted in this way at room temperature. The temperature at which this happens is called the glass temperature, Tq, for the polymer. Some polymers, which have no cross-links, melt completely at temperatures above T, becoming viscous liquids. Others, containing cross-links, become leathery (like PVC) or rubbery (as polystyrene butadiene does). Some typical values for Tg are polymethylmethacrylate (PMMA, or perspex), 100°C polystyrene (PS), 90°C polyethylene (low-density form), -20°C natural rubber, -40°C. To summarise, above Tc. the polymer is leathery, rubbery or molten below, it is a true solid with a modulus of at least 2GNm . This behaviour is shown in Fig. 6.2 which also shows how the stiffness of polymers increases as the covalent cross-link density increases, towards the value for diamond (which is simply a polymer with 100% of its bonds cross-linked. Fig. 4.7). Stiff polymers, then, are possible the stiffest now available have moduli comparable with that of aluminium. 

The two estimates, if plotted, look as shown in Fig. 6.4. This explains why fibre-reinforced composites like wood and GFRP are so stiff along the reinforced direction (the upper line of the figure) and yet so floppy at right angles to the direction of reinforcement (the lower line), that is, it explains their anisotropy. Anisotropy is sometimes what you want - as in the shaft of a squash racquet or a vaulting pole. Sometimes it is not, and then the layers of fibres can be laminated in a criss-cross way, as they are in the body shell of a Formula 1 racing car. 

A copy (5V4 inch floppy disk) of a menu-driven computer program to calculate Gibbs free energy of formation and change in Gibbs free energy for reactions (including random access data file of compound coefficients) is available for a nominal fee. For details, contact C. L. Yaws, Dept, of Chem. Eng. Lamar University, P.O. Box 10053, Beaumont, Texas 77710, USA. 

Although the suite of programs can be run from the floppy disk, for reasons of speed and problem size, running from a hard disk is recommended. To do this, in DOS, type MD directory name, enter, and cd directory name, enter. Type copy a . and the disk will be copied to that directory. Type FTAPSUIT and the screen shown in Figure 6.4-3 is presented. 

The size of event trees is essentially unlimited by its ability to branch and link with other event trees. Work sessions may be saved to floppy or hard disk for recall. 

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