Reproduction accuracy

Maintenance records Application software documentation Data reproduction accuracy Documented verification of process steps Operator identification Data record review by quality control Electronic record/signature type, use, control, and audit trail... 

Reproductibility, accuracy, and calibration. Some applications require high accuracy. Both the initial capital costs and expected maintenance costs are obviously important factors. 

The tolerance in the gloss level may, depending on the material and mold geometry, not be set too narrow, because the reproduction accuracy also decreases depending on the flow path of the material. 

A growing amount of polycarbonate is used for manufacture of optical data storage media such as CDs, CD-ROMs and DVDs. Optical data storage media contain microscopically small items of information, which need to be read without any errors if possible, even under critical ambient conditions. Only a polymer offering high transparency and dimensional stability, coupled with an extremely high reproduction accuracy and dimensional stability, will be a suitable substrate material. 

Proofing materials have many of the same sources of variability as film, plus the added problem of registering, ie, accurately overlaying, the different colored layers. The printing plate must be exposed precisely to hold all that is discernible in the films. The accuracy of the exposure is critical because the plate must retain all the information contained in the films for faithful reproduction on the press. 

Section 2 mainly focuses on the current efforts to improve the accuracy of quantum calculations using simplified empirical model forms. McNamara and Hillier, in Chapter 5, summary their work on improving the description of the interactions in biological systems via their optimized semiempirical molecular models. Piquemal and co-workers present recent advances in the classical molecular methods, aiming at better reproduction of high-level quantum descriptions of the electtostatic interactions in Chapter 6. In Chatper 7, Cui and Elstner describe a different semiempir-... 

For non-compendial procedures, the performance parameters that should be determined in validation studies include specificity/selectivity, linearity, accuracy, precision (repeatability and intermediate precision), detection limit (DL), quantitation limit (QL), range, ruggedness, and robustness [6]. Other method validation information, such as the stability of analytical sample preparations, degradation/ stress studies, legible reproductions of representative instrumental output, identification and characterization of possible impurities, should be included [7], The parameters that are required to be validated depend on the type of analyses, so therefore different test methods require different validation schemes. 

RHF-based methods including MP2 fail to reliably reproduce the vibrational spectra of carbonyl oxides,69 and therefore at the time when 7a was synthesized for the first time22 the calculation of its IR spectrum was beyond the computational capabilities. DFT calculations (B3LYP/6-31G(d,p)) now permit the reproduction of the IR spectrum of 7a with high accuracy even on a personal computer, and thus confirm the earlier assignment. 

The first replicative units must have possessed considerably less information than the RNA viruses, which work with an optimized RNA-copying machinery. In the absence of efficiently adapted enzymes the accuracy of reproduction depends solely on the stability of the base pairs. Under these conditions the GC pair has a selective advantage over the AU pair of a factor of about 10. Model experiments show that for GC-rich polynucleotides the error rate per nucleotide can hardly be reduced below a value of 10-2. The first genes must accordingly have been polynucleotides with a chain length around 100 bases or less. 

Accuracy. We can describe accuracy in one sense as the fidelity of reproduction of a given musical instrument sound. This fidelity can even be given objective measurements, such as percentage distortion. Some musicians have argued that accuracy of reproduction of existing musical instruments should not be the only goal of music synthesis, so we might expand our definition to include measures appropriate for novel musical instrument sounds for which there is no reference point for objective measures of accuracy. In this case, perhaps some measure of the acoustical or perceptual sophistication of a sonic event can be devised, but for this discussion, we only consider... 

An accurate reproduction of the master production record, checked for accuracy, dated, and signed. An investigator will verify that controls exist to make sure that the batch record issued is reproduced from the correct master copy. If a master record changes, there must be some type of documented purging of the files (electronic and/or paper). Additionally, at the time of issuance of a batch record, there must be a documented check for accuracy. This accuracy check should include that all pages issued are complete (no printer or photocopy errors) and that the correct revision of the master was used. 

Clearly, the successful reproduction of the experimental result is, in part, related to the high quality of the potential energy surface. A more direct evaluation of the accuracy of transition-state theory can be obtained via a comparison to other (more exact) theoretical approaches to the calculation of the rate constant, all using the same potential energy surface. Table 6.3 shows such a comparison. We observe that transition-state theory does overestimate the rate constant but the agreement is quite reasonable, especially when the simplicity of the calculation is taken into account. 

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