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My suggestion is to open the pdf datasheet of any prospective switcher IC and carry out a text search (Ctrl + F) for the world foldback. If you find it, question the vendor about its full impact before you select the part for your application. Foldback is, in general, a good idea in terms of protecting the converter under abnormal conditions, but it should be used very judiciously so as not to impact normal behavior. For example, the Simple Switcher family has a hidden second-level current limit protection at which frequency foldback (or skipped pulses) occurs. But that trip level can only be encountered under very severe conditions—namely, a sudden overload with a completely incorrectly sized inductor that hard-saturates in the process. At other times it is not encountered and doesn t therefore interfere. It is considered transparent to all but the most novice engineers. And that is what I consider the right type of foldback. 

A tabular search using the Fact Editor for the conditions [bp > -40] AND [bp < 0] yields 462 hits in 15 s. Since most of the hits contain heteroatoms other than fluorine, it would be better to reissue the search command for compounds that do not contain any nitrogen [bp > - 40] AND [bp < 0] NOT [ N ], which yields 317 hits in 156 s. The asterisk indicates the wild card that stands for any number of characters of any kind, and the is for a text string. When we refine it further to exclude chlorine... 

The search for an advantageous condition of a system is a common problem in science and many algorithms are available to optimize objective functions. In this chapter we will discuss the methods commonly used in molecular mechanics. For a more detailed discussion we refer to specialist texts on computational chemistry193-961. 

Fig. 19.1. Learning acquisition in the spatial reference memory version of a water maze test of mixed background C3B6 mice in two different animal colonies. Mice in the colony A were kept in a quiet room with appropriate for behavioral experiments husbandry practices, while the colony B had increased noise level and sub-optimal for behavioral studies conditions. The mice trained in the colony A showed a significant improvement in finding a hidden platform location during training (their search path was on average about 5 m shorter at the end of training as compared to at the beginning of training). On the other hand, the mice in colony B showed no improvement (the rate of improvement between day 1 and day 5 was about 1 m). See text for further details.

In this paper, we propose a simple mediated approach for multi-issue negotiation with incomplete information based on adjusting the players preferences. In this approach, the mediator searches for a jointly optimal negotiation text for aU players in their conditional preference networks (CP-nets), using a depth-first search based algorithm. The players use utility-based CP-nets to make a decision... 

To ease the decision, there are some rules concerning the proper use of icons. Coded symbols - or icons - should be preferred to text either in the car or on the road whenever any of the following conditions apply (1) quick and accurate recognition of a message is necessary, (2) the information includes visual or spatial concepts, (3) the driver will be performing a visual search of alternatives (e.g., motorist services information), (4) the amount of space on the... 

Our connection tables are not capcdjle of distinguishing stereoisomers or polymers. But codes for the presence of such conditions and text explaining them are stored with the original input formula and are retrieved with it. These are the qualifiers mentioned above. They may also be specified for a chemistry search. 

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