Aggregate assignment

In an aggregate assignment expression, each element of the array is individually assigned its value using a list format. The array could be composed of BIT, INTEGER or any other synthesizable elements. In the two examples above, the use of positional association is demonstrated - the physical position of an expression in the list determines which element in the array is assigned the value. The two examples below illustrate named association. 

The form of aggregate assignment shown in this example associates elements of the array with particular values by the position of the values in the list. It is also possible to form this association by name. Positional and named association can be used in many different types of list, as later ex-... 

When using elements of records in expressions, selected names are also used. Note that aggregate assignment must be used to assign all elements of a record at once. Named associations can be used in such an assignment as normal. See the examples below. 

For the monatomic gases the values of eK/k and gk determined by Whalley and Schneider were used,66 for the other gases, those reported by Hirschfelder, Curtiss, and Bird.15 To the unknown factor z eQlk) t the value 294 was assigned in order to fit the theoretical predictions to the aggregate of experimental data at present available. 

The close-packed-spheron theory8 incorporates some of the features of the shell model, the alpha-particle model, and the liquid-drop model. Nuclei are considered to be close-packed aggregates of spherons (helicons, tritons, and dineutrons), arranged in spherical or ellipsoidal layers, which are called the mantle, the outer core, and the inner core. The assignment of spherons, and hence nucleons, to the layers is made in a straightforward way on... 

The close-packed-spheron theory of nuclear structure may be described as a refinement of the shell model and the liquid-drop model in which the geometric consequences of the effectively constant volumes of nucleons (aggregated into spherons) are taken into consideration. The spherons are assigned to concentric layers (mantle, outer core, inner core, innermost core) with use of a packing equation (Eq. I), and the assignment is related to the principal quantum number of the shell model. The theory has been applied in the discussion of the sequence of subsubshells, magic numbers, the proton-neutron ratio, prolate deformation of nuclei, and symmetric and asymmetric fission. 

Low-frequency conductivity data [37] obtained along this 45°C isotherm are illustrated in Fig 2. The initial oscillatory variation in the conductivity for a > 0.9 can be assigned to variations in AOT partitioning among dimers and other low aggregates and reverse micelles, as reverse micelles are nucleated by added water (brine). These variations will be discussed in greater detail in another publication. The key behavior for the purposes of this exposition is the onset of the electrical conductivity percolation at a = 0.85. The conductivity increases two orders as a decreases from 0.85 to 0.70, and as shown in the inset, the conductivity increases another two orders as a a decreases from 0.7 to 0.3. 

The order parameter values calculated from the data of Fig. 4 are illustrated in Fig. 5. The data there suggest the existence of two continuous transitions, one at a = 0.85 and another at a = 0.7. The first transition at a = 0.85, denoted by the arrow labeled a in Fig. 5, is assigned to the formation of percolating clusters and aggregates of reverse micelles. The onset of electrical percolation and the onset of water proton self-diffusion increase at this same value of a (0.85) as illustrated in Figs. 2 and 3, respectively, are qualitative markers for this transition. This order parameter allows one to quantify how much water is in these percolating clusters. As a decreases from 0.85 to 0.7, this quantity increases to about 2-3% of the water. 

All labeled compounds including n-Bu6Li (from 6Li ingot) were prepared by us. When n-Bu6Li was added to a solution of cyclopropylacetylene (37) and chiral modifier 46 (1 1 ratio) in THF-pentane, the 6Li NMR at -125 °C (A) is shown in Figure 1.7. A few sets of aggregates could be identified. (See Ref [35a] for full assignment). 

The structure of the major aggregate was identified by labeling studies. Since the major set has two equal intensity 6Li signals, these signals could be assigned as a 1 1 complex 68 of lithium acetylide and lithium alkoxide or a dimer (such as 69) of the 1 1 complex 68 shown in Figure 1.9. Both structures have two different Li species. In order to discriminate between 68 and 69, a terminal acetylene carbon of 37 was labeled with 13C. In the case of 68, both lithium signals will be a doublet... 

The assignment of the lutein absorbing at 495 nm as lutein 1 has helped with the identification of an excitation energy quencher in LHCII, when the complex is in aggregated form. 

Besides the main band, H-aggregates also exhibit weaker bands in the red part of the absorption spectrum (marked by in Figure 8.5). Although in some cases the position of these bands coincides with the vibrational bands of the monomeric carotenoid and can be therefore assigned to nonaggregated carotenoid molecules, certain spectral features do not match the vibrational bands... 

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