Field performance

The MM2, MM3, and Merck (MMFF) force fields perform best for a wide range of organic molecules. 

The almost exclusive use of tria2oles foi ceieal powdery mildew control up to the mid-1980s has resulted in a shift in E.Tysiphe populations toward reduced sensitivity or resistance to this class of fungicides. However, use has continued because field performance of most tria2oles has remained adequate (43). Decreased a2ole sensitivity in the population to a2oles has also been noted. 

The film properties required for some appHcation can only be deterrnined by the performance of the appHed coating in practice. Because requirements and exposure conditions vary widely, devising laboratory tests to predict film performance is difficult and frequendy not possible. Data banks of actual field performance as functions of coating compositions, appHcation variables, and environmental factors can be very usehil. 

Formulation of effective corrosion-resistant coatings is made difficult by the lack of a laboratory test that can provide rehable predictions of field performance. The most widely used test is exposure in a salt fog chamber. It has been shown repeatedly, however, that the results of such tests do not correlate with actual performance (125). Outdoor exposure of panels can provide useful data, especially in locations where salt spray occurs, but predictions of performance are not always satisfactory (126). 

Matthews, Terryl, Field Performance Testing to Improve Compressor Reliability, Proceedings of the 10th Turbomachinery Symposium, College Station, TX Texas A M University, 1981, pp. 165-167. 

The study on commercial HDPE samples could not provide a correlation of the izod impact test with the field performance test, i.e., drop impact resistance on moulded products [113]. It was found that the sample of highest density and lowest izod impact strength passed the drop impact test, but other samples of lower density and higher izod impact strength could not withstand shock loading by drop impact and failed in brittle manner. This may be due to the fact that velocities and modes of loading vary widely in different impact tests. It has been reported that even the qualitative agreement between the different impact tests is poor because the test bars and moulded products often have different orientation characteristics, particularly near the surface [115]. 

The field performance of the asphalt-base pipeline enamels was, at one time, erratic, probably because the material had been drawn from varying sources, without a close specification being used. The plasticised coal-tar-base enamel to the American Water Works Association Specification C-203 thus gained some favour in major pipelining organisations. 

G. Burrafato, A. Gaumeri, T. P. Lockhart, and L. Nicora. Zirconium additive improves field performance and cost of biopolymer muds. In Proceedings Volume, pages 707-710. SPE Oilfield Chem Int Symp (Houston, TX, 2/18-2/21), 1997. 

N. Moroni, G. Calloni, and A. MarcotulUo. Gas impermeable carbon black cements analysis of field performances. In Proceedings Volume, volume 2, pages 781-792. E P Forum et al Offshore Mediter Conf (OMC 97) (Ravenna, Italy, 3/19-3/21), 1997. 

Regulatory status In 1998, Lopez Canyon Sanitary Landfill received conditional approval for an ET cover, which required a minimum of 2 years of field performance data to validate the model used for the design. An analysis was conducted and provided the basis for final regulatory approval of the ET cover. The cover was fully approved in October 2002 by the California Regional Water Quality Control Board—Los Angeles Region. 

It is well known that the mechanical and physical properties of vinyl polymers are dependent upon their stereochemical configuration. It is critical, therefore, that the stereoregularity of poly(TBTM/MMA) be determined accurately and conveniently if the field performance of the material is to be predicted with any certainty. The effectiveness of organometallic polymers as an anti-... 

Warren GL, Patel S (2007) Hydration free energies of monovalent ions in transferable intermolecular potential four point fluctuating charge water an assessment of simulation methodology and force field performance and transferability. J Chem Phys 127(6) 064509... 

Holtmyer, M.D. Githens, C.J. "Field Performance of a New High-Viscosity Water Base Fracturing Fluid", SPE paper 875-24-E, 1970 Spring Meeting of the Rocky Mountain District Division of Production, Denver, April 27-29. 

Berger, P.D., Hsu, C., and Arendell, J.P. "Designing and Selecting Demulsifiers for Optimum Field Performance on the Basis of Production Fluid Characteristics," SPE Prod. Eng.. November 1988, 522-526. 

Cascone G, Arcidiacono C, D Emilio A, Mazzarella R (2005) Radiometric properties and field performances of different greenhouse plastic coverings. Acta Hort (ISHS) 691 693-700... 

Forced-vibration instruments, 21 745 Force field calculations, 16 742 Force field energy, 16 742 Force field performance, 16 745 Force fields, 16 743-745 Force field simulations, 16 746-747 programs for, 16 746 Force modulation microscopy, 3 332 Forces, exponents of dimensions in absolute, gravitational, and engineering systems, 8 584t Forchlorfenuron, 13 43t, 53 Ford nuclear reactor, 17 594... 

Beynon, E., Field Performance and Factory Installed Antifreeze Coolants in Passenger Car Service, Reprint No. 660128, Society of Automotive Engineers, New York, NY, January 1966. 

---