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26JPN Crystal Coat - Ceramic Spray Coating, High Gloss, Dirt Repelling, Hydrophobic Paint Sealant, Repels Water and Dirt (500ml)

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US 4580111, Swanson, Hilmer,"Amplitude modulation using digitally selected carrier amplifiers",published 1986-04-01, assigned to Harris Corp Fessenden was a significant figure in the development of AM radio. He was one of the first researchers to realize, from experiments like the above, that the existing technology for producing radio waves, the spark transmitter, was not usable for amplitude modulation, and that a new kind of transmitter, one that produced sinusoidal continuous waves, was needed. This was a radical idea at the time, because experts believed the impulsive spark was necessary to produce radio frequency waves, and Fessenden was ridiculed. He invented and helped develop one of the first continuous wave transmitters – the Alexanderson alternator, with which he made what is considered the first AM public entertainment broadcast on Christmas Eve, 1906. He also discovered the principle on which AM is based, heterodyning, and invented one of the first detectors able to rectify and receive AM, the electrolytic detector or "liquid baretter", in 1902. Other radio detectors invented for wireless telegraphy, such as the Fleming valve (1904) and the crystal detector (1906) also proved able to rectify AM signals, so the technological hurdle was generating AM waves; receiving them was not a problem. It's easy to apply and can be sprinkled onto new concrete or applied as a simple slurry to vertical and cured concrete.

Antunes, P. A., Chierice, G. O., Constantino, C. J. L. & Aroca, R. F. Spectroscopic characterization of N-isobutyl-6-( p-methoxyphenyl) 2 E,4 E-hexadiaeneamide extracted from Ottonia propinqua. Vib. Spectrosc. 27, 175–181, https://doi.org/10.1016/S0924-2031(01)00132-1 (2001). Blanco-Canqui, H. & Lal, R. Tensile strength of aggregates. In (Ed. Lal, R.) Encyclopaedia of Soil Sciences, (Marcel Dekker, New York, 2004). There may be a price to pay other than the price itself, though. As for the price, yes, it is a fair amount more expensive than the others, but in this case, you get what you pay for. Additionally, if one factors-in how many wraps / rods can be built from one kit, it is doubtful CC will cost 50 cents more per rod, an extremely small price to pay a superior product. There are two factors which may be unappealing to some though; 1.) The thin viscosity may require an additional coat, possibly even two, if a deep, high build coating is desired, 2.) With the extended pot life also comes an extended cure time. Personally, these two issues are of little concern to me but I can appreciate others’ priorities may be different. García-Oliva, F., Casar, I., Morales, P. & Maass, J. M. Forest-to-pasture conversion influences on soil organic carbon dynamics in a tropical deciduous forest. Oecologia 99, 392–396, https://doi.org/10.1007/BF00627754 (1994). González-Pérez, M., Milori, D. M. B. P., Colnago, Martin-Neto, L. & Melo, W. J. A laser-induced fluorescence spectroscopic study of organic matter in a Brazilian Oxisol under different tillage systems. Geoderma 138, 20–24, https://doi.org/10.1016/j.geoderma.2006.10.010 (2007).AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. [1] This original form of AM is sometimes called double-sideband amplitude modulation ( DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands and possibly the carrier signal, which improves the ratio of message power to total transmission power, reduces power handling requirements of line repeaters, and permits better bandwidth utilization of the transmission medium. Sarker, J. R. et al. Tillage and nitrogen fertilization enhanced belowground carbon allocation and plant nitrogen uptake in a semi-arid canola crop-soil system. Sci. Rep. 7, 10726, https://doi.org/10.1038/s41598-017-11190-4 (2017).

Bornemann, L., Welp, G. & Amelung, W. Particulate organic matter at the field scale: rapid acquisition using mid-infrared spectroscopy. Soil Sci. Soc. Am. J. 74, 1147–1156, https://doi.org/10.2136/sssaj2009.0195 (2010). Zhang, Z. D., Yang, X. M., Drury, C. F., Reynolds, W. D. & Zhao, L. P. Mineralization of active soil organic carbon in particle size fractions of a Brookston clay soil under no-tillage and mouldboard plough tillage. Can. J. Soil Sci. 90, 551–557, https://doi.org/10.4141/CJSS09081 (2010). Rumpel, C., Janik, L. J., Skjemstad, J. O. & Kögel-Knabner, I. Quantification of carbon derived from lignite in soils using mid-infrared spectroscopy and partial least squares. Org. Geochem. 32, 831–839, https://doi.org/10.1016/S0146-6380(01)00029-8 (2001).Concrete treated with MacLennan's CrystalCoat remains vapour permeable, allowing the structure to ‘breath’. Another improvement over standard AM is obtained through reduction or suppression of the carrier component of the modulated spectrum. In figure 2 this is the spike in between the sidebands; even with full (100%) sine wave modulation, the power in the carrier component is twice that in the sidebands, yet it carries no unique information. Thus there is a great advantage in efficiency in reducing or totally suppressing the carrier, either in conjunction with elimination of one sideband ( single-sideband suppressed-carrier transmission) or with both sidebands remaining ( double sideband suppressed carrier). While these suppressed carrier transmissions are efficient in terms of transmitter power, they require more sophisticated receivers employing synchronous detection and regeneration of the carrier frequency. For that reason, standard AM continues to be widely used, especially in broadcast transmission, to allow for the use of inexpensive receivers using envelope detection. Even (analog) television, with a (largely) suppressed lower sideband, includes sufficient carrier power for use of envelope detection. But for communications systems where both transmitters and receivers can be optimized, suppression of both one sideband and the carrier represent a net advantage and are frequently employed. Morris, A. M., Watzky, M. A. & Finke, R. G. Protein aggregation kinetics, mechanism, and curve-fitting: A review of the literature. BBA - Proteins Proteom. 1794, 75–397, https://doi.org/10.1016/j.bbapap.2008.10.016 (2009). Demyan, M. S. et al. Use of specific peaks obtained by diffuse reflectance Fourier transform mid-infrared spectroscopy to study the composition of organic matter in a Haplic Chernozem. Eur. J. Soil Sci. 63, 189–199, https://doi.org/10.1111/j.1365-2389.2011.01420.x (2012).

Nyamadzawo, G., Nyamangara, J. & Nyamugafata, P. Soil microbial biomass and mineralization of aggregate protected carbon in fallow-maize systems under conventional and no-tillage in Central Zimbabwe. Soil Till. Res. 102, 151–157, https://doi.org/10.1016/j.still.2008.08.007 (2009). Katsumoto, Y., Adachi, D., Sato, H. & Ozaki, Y. Usefulness of a curve fitting method in the analysis of overlapping overtones and combinations of CH stretching modes. J. Near Infrared. Spec. 10, 85–91, https://doi.org/10.1255/jnirs.325 (2002). AM remains in use in many forms of communication in addition to AM broadcasting: shortwave radio, amateur radio, two-way radios, VHF aircraft radio, citizens band radio, and in computer modems in the form of QAM. In this simple case m is identical to the modulation index, discussed below. With m = 0.5 the amplitude modulated signal y( t) thus corresponds to the top graph (labelled "50% Modulation") in figure 4.Figure 4: Modulation depth. In the diagram, the unmodulated carrier has an amplitude of 1. Modulation methods [ edit ] Anode (plate) modulation. A tetrode's plate and screen grid voltage is modulated via an audio transformer. The resistor R1 sets the grid bias; both the input and output are tuned circuits with inductive coupling. The modulating message signal may be analog in nature, or it may be a digital signal, in which case the technique is generally called amplitude-shift keying. AT&T, Telecommunication Transmission Engineering, Volume 1— Principles, 2nd Edition, Bell Center for Technical Education (1977)

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