Pull technology

Parrott S (2005) The quiet revolution push-pull technology and the African farmer. Gatsby Occasional Paper, Gatsby Charitable Foundation, London, p 26 Pedersen GA, Brink GE (1988) Compatibility of five white clover and five tall fescue cultivars grown in association. Agron 1 80 755-758... 

Procardia XL, which is marketed by Pfizer, is a billion-dollar product employing Push-Pull technology. The preparation contains the calcium channel blocker nifedipine.40 A full list of marketed products developed by ALZA Corporation is shown in Table 7.4. 

A CR osmotic system based on OROS push-pull technology to deliver drugs to the oral cavity for extended time periods. 

Basic circuit of power unit based on push-pull technology [9]. 

Generic Name hydromorphone extended-release Proprietary Name Jurnista (OROS Push-Pull technology)... 

Within the sulfur world, there is a notable example of pure market pull the replacement of elemental sulfur by pyrites after the TAC incident. An unprecedented feature was the speed of the entire process, from the technical development to its penetration into a global industry. The stage had been perfectly set. The new technology was fairly easy to develop and implement. The special feature was that the customers detested the current supplier. The sulfur world had more than its fair share of these market-pull technology advances the Frasch process is another notable example. That is not to say that sulfur scientists are more market oriented than others. Quite the opposite, the driving force has often been the poor performance of the sulfur industry, which creates these rare maiket-pull opportunities. Instead of being labeled market-pull situations, fundamentally they should more properly be tagged supplier push ... 

In eore pull technology, the cavity is first completely filled and the moulded part is subjected to melt back pressttre (Figttre 10.24a). Before or during the introduction of the gas, an additional displaced volume is created in the main cavity by the withdrawal of one or more of the cores (Figme 10.24b). 

Belt Presses Belt presses were fiiUy described in the section on filtration. The description here is intended to cover only the parts and designs that apply expression pressure by a mechanism in adchtion to the normal compression obtained from tensioning the belts and pulling them over rollers of smaller and smaller diameters. The tension on the belt produces a squeezing pressure on the filter cake proportional to the diameter of the rollers. Normally, that static pressure is calculated as P = 2T/D, where P is the pressure (psi), T is the tension on the belts (Ib/hnear in), and D is the roller diameter. This calculation results in values about one-half as great as the measured values because it ignores pressure created by drive torque and some other forces [Laros, Advances in Filtration and Separation Technology, 7 (System Approach to Separation and Filtration Process Equipment), pp. 505-510 (1993)]. 

For all the applications discussed above, which may require special starting and/or pull-out torques or speed variations, the use of static drives is more appropriate today. With the use of this technology, a standard motor can be made to perform any required duty, except the constructional features and the applicable deratings as discussed in Chapter 1. See also Example 7.1. 

Static sampling systems are defined as those that do not have an active air-moving component, such as the pump, to pull a sample to the collection medium. This type of sampling system has been used for over 100 years. Examples include the lead peroxide candle used to detect the presence of SO2 in the atmosphere and the dust-fall bucket and trays or slides coated with a viscous material used to detect particulate matter. This type of system suffers from inability to quantify the amount of pollutant present over a short period of time, i.e., less than 1 week. The potentially desirable characteristics of a static sampling system have led to further developments in this type of technology to provide quantitative information on pollutant concentrations over a fked period of time. Static sampling systems have been developed for use in the occupational environment and are also used to measure the exposure levels in the general community, e.g., radon gas in residences. 

Equally impressive was the introduction of new locomotive technology. For approximately the same fuel economy, a top-of-the-line locomotive in 1997 could generate twice the horsepower, pull more than twice the load, and reach a top speed 5 mph faster (75 mph) than a top-of-the-line locomotive in 1972. The better locomotives and lighter double-stack cars of the 1990s could replace as many as 280 trucks from the roadways for every 6,000 ft. train. 

A thinned CCD will naturally build up an internal electric held that will pull electrons to the back surface with a subsequent loss of photoelectrons. In order to overcome this natural electric held, a backside passivation process must be used. There are three primary technologies to passivate the backside ... 

A Historical Description of the Interplay between Technology Push and Market Pull... 

Figure 1.35 Current state of scientific and market implementation of micro reactors and optimistic future scenario. Micro reactors are today a device market and are technology driven (top). The future scenario is under market pull and will ask for more plant/total-system solutions (bottom).

The phenomenal growth of the World Wide Web and Internet has revolutionized the delivery of text and image-based information. All signs point to the idea that this will be the definitive technology for the foreseeable future. The rate of change in computer capabilities will pull us all forward. Some of us may not be in the position to drive such changes but merely will be able to follow. One sees acronyms such as CADDY, PDF, HRML, and XML, but what exactly do they mean How would an electronic submission function What would it look like What are the basic pieces, or building blocks, of an electronic submission ... 

Understanding of markets and the need for a supplier-user partnership. Where is the value added If the market needs are understood, the value of the performance material can be estimated, and market-pull will ensure that the technology is cost-effective and commercially viable. This result will almost always require a working partnership between the material developer and the end user. 

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