Monitoring middleware for distributed applications

With growing maturity Internet services are proving integral to the provision of computer services. To provide consistent end-user experiences these services are increasingly augmented with some notion of 'Quality-of-Service' (QoS), which typically requires the management of computing resources to maintain a predictable level of service performance. It is difficult to guarantee consistent servIce provision In dynamic and open environments such as the Internet. However service monitoring can be used to inform compensatory actions by collecting meaningful service performance data from strategic points in an active service environment. Due to the unpredictable nature of the Internet distributed monitoring mechanisms face challenges with respect to the various communication protocols, application languages, and monitoring requirements associated with a service environment. With the growing popularity of Internet services creation of monitoring solutions on a per- service basis becomes time-consuming and misses opportunities to re-use existing logic. Ideally monitoring solutions would be domain-agnostic, automatically generated and automatically deployed. This thesis progresses these ambitions by providing a generic, distributed monitoring and evaluation framework based on Metric Collector (MeCo) components. These components can transparently gather measurement data across a range of service technologies as used within E-Commerce service environments. MeCo components form part of a framework which can interpret Service Level Agreements (SLAs) to automatically provide tailored service monitoring. The evaluation paradigms of the Meeo Framework are re-appropriated for use in Distributed Virtual Environments (DYEs). Quantifiable QoS requirements are established for Interest Management mechanisms (which limit message production based on object localities within a DYE). These are then incorporated into a DVE Simulator application. This application allows DYE application developers to evaluate Interest Management configurations for their suitability. Extensions to the DVE Simulator are exhibited in the Evolutionary Optimisation Simulator (EOS), which provides automated optimisation capabilities for DVE configurations through utilisation of genetic algorithm techniques.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Burnobuilt, INC. v. Strata, INC. Clerk\u27s Record Dckt. 46638

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Range Information Systems Management (RISM) Phase 1 Report

RISM investigated alternative approaches, technologies, and communication network architectures to facilitate building the Spaceports and Ranges of the future. RISM started by document most existing US ranges and their capabilities. In parallel, RISM obtained inputs from the following: 1) NASA and NASA-contractor engineers and managers, and; 2) Aerospace leaders from Government, Academia, and Industry, participating through the Space Based Range Distributed System Working Group (SBRDSWG), many of whom are also; 3) Members of the Advanced Range Technology Working Group (ARTWG) subgroups, and; 4) Members of the Advanced Spaceport Technology Working Group (ASTWG). These diverse inputs helped to envision advanced technologies for implementing future Ranges and Range systems that builds on today s cabled and wireless legacy infrastructures while seamlessly integrating both today s emerging and tomorrow s building-block communication techniques. The fundamental key is to envision a transition to a Space Based Range Distributed Subsystem. The enabling concept is to identify the specific needs of Range users that can be solved through applying emerging communication tec

Geochemistry of intrusive rock suites and related porphyry copper mineralization in the Papua New Guinea - Solomon Islands region

In the Papua New Guinea-Solomon Islands region of the southwest Pacific, calc-alkaline intrusive complexes and closely associated porphyry-type copper mineralization of Tertiary and younger age occur in three contrasted tectonic settings: in island arcs, in the Australian continental margin (New Guinea Mobile Belt), and in the Australian continental block. The intrusive complexes of all three settings display a wide range of calc-alkaline mineralogy and chemistry. Geochemical data for the intrusive rocks indicate increasing abundance of 'incompatible' elements from island arc areas, through the continental margin, to the continental block. Regional geochemical variations are also evident in abundance of particular elements in restricted regions, and in overall northwards increase of potassium and related 'incompatible' elements across the Mobile Belt. Genesis of most of the calc-alkaline intrusive complexes involves hybridism of silicic partial melts and refractory material from igneous source rocks in the base of the crust at depths of 20-40 km. Some mafic suites had their source in the upper mantle. The geochemistry of intrusive suites reflects the composition of their source materials. Partial melting is caused by rise of isotherms during prolonged magmatism, and is aided by decrease in load pressure following rapid uplift and erosion. Partial melting beneath the Mobile Belt in Lower to Middle Miocene times was achieved by such means without the participation of a Benioff zone. Mineralized intrusive rock suites were slightly more waterrich than non-mineralized suites. They are characterized by the primary mineral assemblage hornblende + magnetite + sphene, stability of increasingly Mg-rich mafic mineral compositions during crystallization, and lack of mafic inclusions. Later intrusion of mineralized suites in intrusive complexes is a consequence of later partial melting of slightly more water-rich source material at higher levels in the base of the crust. The origin of hydrothermal solutions responsible for porphyry-type mineralization is intimately related to final stages of crystallization of relatively water-rich intrusive suites

Bowdoin Orient v.90, no.1-22 (1960-1961)

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