Walk-off

Figure Bl.3.8. A WMEL diagram for die three-colour fifth order qiiasi-Ramaii echo . As usual, the first pair of field actions creates the Raman coherence which is allowed both to dephase and walk off with time. This is followed by a second pair of field actions, which creates a different but oppositely phased Raman coherence (now hf) to the first. Its frequency is at oi - = e y Provided that frequencies are identified...

An action is identified only in retrospect. If someone selects some goods in a shop, it will often be the first step to a sale but the shopper might decide not to buy or might walk off without paying so it turns out not to have been a sale but a theft. 

H. Wang and A.M. Weiner, Efficiency of short-pulse type-I second-harmonic generation with simultaneous spatial walk-off, temporal walk-off, and pump depletion, IEEE Journal of Quantum Electronics 39(11), 1600-1618 (2003). 

We haven t reached our destination don t walk off while we are still midway. 

Electrocatalysis has just been described. One important feature of an electrocata -lyst is that it goes through the electrodic reaction unchanged. Its sole function is to act as an electron source or sink and as a surface for the adsorption of any intermediates involved in the reaction. Or, if one prefers to think in terms of the crystalline lattice that constitutes the solid electrocatalyst, it is clear that the lattice neither disintegr ates by its constituent particles walking off into solution nor grows by particles from the solution adding onto the lattice permanently. The surface of the electrocatalyst is a stable frontier it neither advances nor recedes. 

I sat up and walked off to the edge of the beach. I was left with a sort of knowingness. 

Edwin Lightfoot Yes, I think it will. Mort, you gave an example with the seminars. I find that in Wisconsin just walking off to lunch is bad enough, because I ll meet somebody doing something interesting, and a new project is started. In a real university, where most of us come from, the possibilities are enormous. 

I walked off the pier onto the main island (later I was told it was sixteen acres (6.5 hectare) in size). This island was completely surrounded by a brick fort with walls eight feet (2.4 m) thick and fifty feet (15 m) high. Another smaller brick wall formed a moat around the fort. I walked through the entrance into the fort, but inside it was dark. There were large and small boxes of unidentified contents stacked inside. 

The optical passband A1 with an acoustic walk-off angle [Pg.221]

Formamidine effects on twospotted spider mites, Tet-ranychus urticae, included elicitation of walk-off and spin-down dispersal and reduction of fecundity and egg hatch. Formamidine-induced walk-off and spin-down were not correlated, but the former was significantly associated with formamidine-induced lethality. A moderately strong correlation existed among the activities of formamidines in reducing fecundity, egg hatch, and reproductive potential, whereas only weak associations were found between these parameters and formamidine-induced lethality. 

These results suggest that the mechanism(s) involved in formamidine-induced lethality and walk-off in mites may be similar, but other mechanisms possibly are involved in formamidine-induced spin-down and reduction of fecundity and egg hatch. 

Sixty-seven compounds, including two formanilides and two anilines, were examined (18). Twenty-eight formamidines elicited dispersal behavior significantly greater than controls 39 compounds, including the two formanilides and two anilines, were inactive. Fifteen formamidines elicited both walk-off and spin-down, whereas three induced walk-off only and ten spin-down only (18). 

In a study of arylthioformamidine-mediated dispersal in the twospotted spider mite (8) and the carmine spider mite, Tetrany-chus cinnabarinus (9), it was concluded that walk-off was a function of the formamidine portion of the molecule, whereas spin-down was a function of the thiophenyl moiety. The present study (18) corroborates this conclusion. 

A dispersal and mortality correlation matrix for formamidines and spider mites is given in Table II. Total dispersal was correlated with walk-off and spin-down, but the former clearly was the major component. Total dispersal also was correlated with mortality. However, spin-down was not correlated with walk-off or with mortality. Walk-off was correlated with mortality (18). 

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