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• Association, Aggregation and Composition.
• Problem: UML has several relations (association, aggregation and composition) that seem to all mean the same thing : "has a".
• Example: |A|----------->|B| class A { private: B* itsB; }; Aggregation . ... This is exactly the same as an association with the exception that instances cannot have cyclic aggregation relationships (i. ...
• Example: |Node|<>-------->|Node| class Node { private: vector<Node*> itsNodes; }; The fact that this is aggregation means that the instances of Node cannot form a cycle. ...
• is exactly like Aggregation except that the lifetime of the 'part' is controlled by the 'whole'. ...

• Aggregation (UML).
• Aggregation refers to the components of a class .

• Aggregation defines a new landscape in information retrieval for goods and services on the Internet.
• In addition, aggregators may also provide important post-aggregation services. ...

• Aggregation and Disaggregation of Information Goods: .
• We analyze pricing strategies that are based on aggregation or disaggregation of digital information goods. ... We show that reductions in marginal costs made possible by low-cost digital processing and storage of information will favor aggregation, while reductions in transaction and distribution costs made possible by ubiquitous networking tend to make disaggregation of information goods more profitable. Our analysis demonstrates how the increasing availability of information goods over the Internet will lead to increased use of both disaggregation-based pricing strategies taking advantage of micropayment technologies, and aggregation strategies where information goods will be offered in bundles, site licenses, and subscriptions.
• For instance, aggregation can take place across products, as when software programs are bundled for sale in a software "suite" or when access to the various content of an on-line service is provided for a fixed fee. Aggregation can also take place across consumers, as with the provision of a site license to multiple users for a fixed fee, or over time, as with subscriptions (Odlyzko, 1996; Varian, 1995, 1996). ...
• Considering the distribution and transaction costs in addition to the marginal cost of production, we compare pricing strategies based on aggregation and disaggregation. We find that lower transaction and distribution costs tend to make unbundling (disaggregation) more attractive for sellers, while lower marginal costs of production tend to make bundling (aggregation) more attractive. We also demonstrate that some of our earlier results on bundling can be generalized to other types of aggregation, such as site licensing and subscriptions. We find that, as with bundling, aggregating information goods across consumers or time is often an effective strategy that maximizes societal welfare and the sellers’ profits; however, aggregation is less attractive when marginal costs are high or when consumers are very heterogeneous.
• In section 2, we present the basic argument for the impact of aggregation on profits and efficiency and provide a graphical intuition. ... In section 4, we show how the formal results can be applied to aggregation in other dimensions, such as site licensing and subscriptions. Section 5 discusses extensions of the model to "mixed" aggregation—the simultaneous sale of both aggregates and their sub-components—and addresses issues related to micropayments. ...
• Aggregation Changes Demand.
• First, aggregation can directly increase the value available from a set of goods, because of technological complementarities in production, distribution, or consumption. ...
• Second, aggregation can make it easier for the seller to extract value from a given set of goods by enabling a form of price discrimination. This effect of aggregation is subtler and, in the case of bundling, has been studied in a number of articles in the economics literature (e. ... While the benefits of aggregation due to technological complementarities are relatively easy to see, the price discrimination effect does not seem to be as widely recognized outside the economics literature, although it can dramatically affect both efficiency and profits (Bakos and Brynjolfsson, 1996).

• 5 Quantifying Aggregation of IgE-FcRI by Multivalent Antigen .
• Aggregation of cell surface receptors by multivalent ligand can trigger a variety of cellular responses. A well-studied receptor that responds to aggregation is the high affinity receptor for IgE (FcRI), which is responsible for initiating allergic reactions. To quantify antigen-induced aggregation of IgE-FcRI complexes, we have developed a method based on multiparameter flow cytometry to monitor both occupancy of surface IgE combining sites and association of antigen with the cell surface. The number of bound IgE combining sites in excess of the number of bound antigens, the number of bridges between receptors, provides a quantitative measure of IgE-FcRI aggregation. ... The results, which we analyze with the aid of a mathematical model, indicate how IgE-FcRI aggregation depends on the total concentrations of DNP25-PE and surface IgE. As expected, we find that maximal aggregation occurs at an optimal antigen concentration. We also find that aggregation varies qualitatively with the total concentration of surface IgE as predicted by an earlier theoretical analysis. ...

• Diffusion Limited Aggregation (a fractal growth model) .
• Instruction: Clusters of Diffusion Limited Aggregation (DLA) can be generated by pressing the "Grow" button. ...

• PFS provides products with the intelligence to enable unparalleled file tracking and file-system aggregation whether files are on local media, network storage, or across the Internet. ...
• Software solutions for enterprise storage management is 1Vision's central focus, with unique file-system aggregation for Windows servers and Network Attached Storage (NAS). ...
• vSERV is the first software to achieve true server and NAS aggregation enabling an entire networked storage system to work as if it were one virtual device. ...

• Aggregation.

• © 2003 by Society for Leukocyte Biology Artificially controlled aggregation of proteins and targeting in hematopoietic cells .
• Aggregation is believed to be important for protein sorting-for-entry and sorting-by-retention in endocrine and neuroendocrine cells. We asked whether artificially induced multimerization/aggregation of chimeric proteins could affect their sorting in hematopoietic cells. ... We conclude that protein multimerization/aggregation per se is not enough to facilitate sorting-for-entry to secretory lysosomes in hematopoietic cells and that improperly folded proteins may be eliminated from sorting by constitutive secretion. ...

• RDFWeb: developers: aggregation strategies .
• RDFWeb notebook: aggregation strategies .
• RDF uses Web identifiers (URI names) to facilitate data aggregation, ie. ...
• RDF datastores need some common baseline techniques that can deployed with moderate effort; these need not attempt a perfect solution to the data aggregation problem, but they will need to go some way towards usefully handing data that (a) describes things without naming them and (b) describes things that lack URI names. ...

• IPV6 TOP LEVEL AGGREGATION IDENTIFIER ASSIGNMENTS DEPRECATED BY RFC-huston-ip6-iana-registry-05. ...

• IDB Aggregation Help.

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