Limitations of Present Technology

As one may have expected, theoreticians have gathered numerous possibilities to verify Moore s Law. For instance, they have announced the end of the silicon s densification (silicon brick wall). Similarly, they have predicted the point at which silicon-based devices may not be further reduced. All these theoretical predictions had, however, to be continually revised. This is because the basic models behind these theses was the inability to process ever smaller structures in silicon. In that sense, all predictions were based on technological limitations rather than upon a physical science barrier. It might be serendipitous that engineers have overseen the theoretical predictions hinting to the end of silicon. Instead, they continued to build smaller devices and denser integrated circuits. 

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The Limitation of Present Technology. However, the ability to increase efficiency by reducing plant drive power requirements is limited by the reformer which is the sole consumer of natural gas. 

In the laboratory we have combined many and varied types of materials with sulfur. Although we are just learning about the chemical-mechanical modifications of sulfur, we are beginning to be able to define the limits of present technology in this area. 

Monetary and Fundamental Physical Limitations of Present Technology... 

A method should be able both to quantify the amount of marker drug residue present in the sample and to identify the compound unambiguously. Historically, this required two distinct procedures a determinative procedure used to quantify the analyte, and a confirmatory procedure used to unequivocally identify the analyte. The need for two procedures was driven by the limitations of available technology. Most determinative methods over the last two decades have been based on liquid chromatography, usually with ultraviolet (UV)/visible or fluorescence defection. Limitations of cost. 

For all three areas the direction is already well established. Techniques that have been studied would be refined and optimized for the particular problem. Pressurized ion exchange in its present state of development permits successful processing of materials 10 to 100 times more radioactive than does conventional ion exchange chromatography. It is not clear what the ultimate limits may be, but a significant extension of present technology is clearly available if the need should arise. 

To summarize, at the present time, no conventional ab initio calculation has been able to yield accurate spectroscopic constants for Ctj. The source of the problem is clear in general terms—more correlation is needed and the types of correlation terms needed have been at least partly defined . However, the non-empirical implementation of calculations including these terms appears to be beyond the limits of present-day technology. (See also Ref. 388.)... 

Past and present human activities have resulted in the release of contaminants at a large number of sites across Europe and around the world. These activities have results in over 750,000 contaminated sites in Europe alone (Ferguson, et al., 1998). The limitations of available technologies and resources prevent the restoration of all of these sites to background conditions that existed prior to industrialisation. As a result, methods are needed to i) evaluate the likely impact of these sites on human health and ecological resources, ii) manage individual sites in a manner that efficiently utilizes the available resources to prevent or mitigate impacts to... 

The limitation of NDIR technology for gas detection depends on the uniqueness of the absorption spectrum of a particular gas. IR sensors can detect gases in inert atmospheres (little or no oxygen present), are not susceptible to poisons, and can be made very specific to a particular target gas. 

Basic principles of hydrogen sorption in, and permeation through, palladium-based metallic membranes are then presented in Sections 18.3 and 18.4. Membrane characterization and performance are discussed in Section 18.5, and some applications are presented in Section 18.6. Finally, advantages and limitations of existing technologies are discussed in Section 18.7, and some prospective issues are considered. 

There are a number of limitations of this technology which also indicates opportunities for further development These are presented in Table 24.2. 

This paper highlights the problem of mercury emissions in Europe. It also discusses the issues of transportation of mercury via human body and presents health hazards and their preventive actions. Finally, the limitations of existing technologies along with emerging technologies are widely summarized. 

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