The view of line-bound energy industries as "natural monopolies" has changed considerably during recent years upon the perception that each of the industries could be seen as a combination of different functions. The natural monopoly perception for each function has been reassessed, resulting in many cases in transportation functions such as transmission and distribution as well as dispatch rem...

Multiple dispatch allows determining the actual method to be executed, depending on the dynamic types of its arguments. Although some programming languages provide multiple dispatch, most widespread object-oriented languages lack this feature. Therefore, different implementation techniques are commonly used to obtain multiple dispatch in these languages. We evaluate the existing approaches, pre...

The increasing pressure of competition in the dispatch trade in Germany requires a faster and more flexible adjustment of the systems to the customer's requests. Additional to questions of complexity, questions of flexibility and vitality are urging into the foreground. The paper presents instruments for the handling more integrated, at the same time however complexityreducing models of Neckerm...

In a deregulated environment, independent generators and utility generators may or may not participate in the load-frequency control of the system. For the purpose of evaluating the performance of such a system, a flexible method has been developed and implemented. The method assumes that load frequency control is performed by an ISO based on parameters defined by the participating generating u...

During an emergency, the on-scene communication takes place in the form of dispatch-mediated emergency messages. These messages, identified from the emergency communication reports, follow no standardized format, which render them useless for several other departments. This paper develops a messaging model, compliant with UCORE messaging framework, as follows: First, it determines the structure...

8:9 ; < =?>A@CB >ED F < G+@2HJI"K LNME< G OCP">E; B >E;"QRK STSVU ; @WG+>XK ;Y@Z< MEMADZI >ADC<[D < MX>EOZ; G\SVO]< G+U"L+O^K S%K P _)O]@`G abK L+>XO]; G+O]BcF"L K Q L2< =?=?>X; Q MA< ;"Q U < Q O]D\ME>Xd OfeNgCgh< ;iBkj <$l <"monbGp@]< ;qPiOR@ZK D G ME9YK ; B O]OZF"ME9kF">XF6OZME>E;"O]BrF"L K @ZO]D+D K L+D]IJP6O]@Z< U D OfB 9 ; < =^>A@R@]< MEMED G+L+< ; D MA< G+OsG+KpH < L+B atG K atF L O4B >E@...

With the advent of restructured electricity markets a contentious market design issue has been whether unit commitment decisions should be made centrally by the system operator or by individual generators. Although a centrally committed market can, in theory, determine the most efficient commitment, they have been shown to suffer some equity and incentive problems. A self-committed market can o...

This work is supported in part by Wright Laboratory Avionics Directorate, Air Force Material Command, USAF, under grant #F33615-94-1-1525 and ARPA order no. B550, NSF PYI Award CCR-9157366, NSF Grants MIP-9225097 and MIP9625558, an IBM graduate fellowship, and donations from A.T.&T. Bell Laboratories, Hewlett Packard, IBM Corporation, and Sun Microsystems. The U.S. Government is authorized to r...

We explore !.he ramifications ofobject residency assumptions and their impact on residency checking for several subroutine dispatch scenarios: procedural, static object-oriented, and dynamic (virtual) object-oriented. We obtain dynamic counts of the residency checks necessary for execution of several benchmark persistent programs under each of these scenarios. The resuhs reveal that significant...