Doorway

In each case we have indicated the doorway stage using parentheses. We note how in each of the two groups ((i) and... 

Flere, the linear polarizability, a (oip 2), corresponds to the doorway stage of the 4WM process while to the window stage. We also see the (complex) Raman resonant energy denominator exposed. Of the tliree energy denominator factors required at third order, the remaining two appear, one each, m the two Imear polarizability tensor elements. 

In fact, each linear polarizability itself consists of a sum of two temis, one potentially resonant and the other anti-resonant, corresponding to die two doorway events, and D, and the window events, and described above. The hyperpolarizability chosen in equation (B1.3.12) happens to belong to the generator. As noted, such tliree-coloiir generators caimot produce Class I spectroscopies (fiill quadrature with tliree colours is not possible). Only the two-colour generators are able to create the Class I Raman spectroscopies and, in any case, only two colours are nomially used for the Class II Raman spectroscopies as well. 

Let us consider RRS that contams both of the available additional resonances, as is nomially the case (though carefiil choices of colours and their time sequence can isolate one or the other of these). First, we seek out the doorway events that contain not only the usual Raman resonance after the two fields, 1 and 2, have acted conjugately, but also the new resonance that appears after the first field has acted. The appropriate doorway generators remain S and e ei, in order to retain the Raman resonance. There are now two fully resonant... 

Figure Bl.3.4. The two fully resonant doorway stages for resonanee Raman seattering (RRS), in wlheh the manifold of vibrational sublevels for eaeh eleetronie state is indieated. (a) Doorway stage iii...

Wliatever the deteetion teehnique, the window stage of the 4WM event must eonvert these evolved vibrational wavepaekets into the third order polarization field that oseillates at an ensemble distribution of optieal frequeneies. One must be alert to the possibility that the window event after doorway ehaimel B may involve resonanees from eleetronie state manifold e to some higher manifold, say r. Thus ehaimel B followed by an e (ket) or a (bra) event might be enlianeed by an e-to-r resonanee. However, it is nonnal to eonfine the... 

Let us, for example, present the fiill WMEL diagrams for full quadrature RRS with two colours, 1 and 2. (Recall that tliree colours caimot lead to full Q at the 4WM level.) Given the ei doorway generator for... 

Figure Bl.3.5. Four WMEL diagrams for fiilly resonant Raman scattering (RRS). Diagrams (a) and (b) both have doorway stage rr(A.j2 ) (Figure B 1.3.4(a)), in which a vibrational coherence is created in the ground electronic state, g. For the window event in (a), field 1 promotes the bra from the ground electronic state, g, to...

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The entire space within the building or storage area and outside any doorway, low level ventilator or other opening into the store within the separation distance set out in Table 9.1 7, column 3, up to a height of 1.5 m above ground level. 

Are similar preeautions also taken with regard to eraeks or holes in walls, open doorways, and open or broken windows ... 

An air curtain is to be used in the doorway of an industrial building to prevent the penetration of cold air into the building. The task is to dimension this air curtain device for the following climatic conditions ... 

The wind velocities are local values at the height of the doorway, so no additional wind sheltering coefficients or height corrections are necessary. A solution is sought for which both situations above can be handled with the same air curtain device by just changing the fan speed and the heating power of the air curtain. 

The building (see Fig. 7.95) is 12 m high and has three large openings. The doorway for which the air curtain is designed is on the ground level, has dimensions 4 m (height) x 6 m (width), and is intended primarily for vehicular traffic. 

Hi Width and height of doorway i /. I Initial width and length of linear jet... 

In another building, gusting winds caused transient increases in pressure that tripped the ventilation fans. The problem was overcome by increasing the fan speeds. Unfortunately the increased flow of cold air through a doorway cooled a fire water main so much that it froze and cracked [21 ]. 

Foundations and trenches will be formed prior to boiler delivery. The boiler house structure may be erected before or after delivery of the boilers, dependent upon site conditions and the type of boiler. Due consideration will be given to access openings and doorways and provision for lifting any items of plant once the boiler house is complete. 

Ideally, the walls should be of brick or concrete with an insulated roof. Large areas of glass should be avoided. It is desirable that all routine maintenance and operating functions can be carried out without having to open doorways. Openings and access to the boilerhouse should be away from sensitive areas. Free areas for air for both combustion and ventilation should be through acoustic louver... 

Room overpressure can conveniently be tested during this period. Produce a single line sketch of the conditioned space(s) including doorways. Test for air-flow direction with hand smoke tubes, both at the top and bottom of closed doors, and record the direction of flow. Crack the doors open if fully sealed. 

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