of these outages is software aging. Software aging phenomena refers to the accumulation of errors, usually provoking resource con-tention, during long running application executions, like web applications, which normally cause applications/systems hang or crash. Determining the software aging root cause failure

. To validate our methodology, we have implemented Pinpoint, a framework for root cause analysis on the J2EE platform that requires no knowledge of the application components. Pinpoint consists of three parts: a communications layer that traces client requests, a failure detector that uses traffic

-temporal con gurations constitute cultures. They are enacted, reproduced, and ultimately transformed by social actors, rooted in the social structure, yet freely engaging in con ictive social practices, with unpredictable outcomes. A fundamental feature of social structure in the Information Age is its

Current software development techniques and tools lack the capability to characterize function call chains in multithreaded and distributed applications built upon component technologies like CORBA, COM and J2EE. The root cause is that causal linkage information necessary to trace end-to-end call

Abstract: A series of nite element (FE) models of ground oor slab behaviour has been developed and validated against in situ data from site instrumentations. Good agreement was obtained for thermal ow models, and the negative impact of air movement over the top of the slab has been highlighted

Algebraic algorithms deal with numbers, vectors, matrices, polynomials, for-mal power series, exponential and differential polynomials, rational functions, algebraic sets, curves and surfaces. In this vast area, manipulation with matri-ces and polynomials is fundamental for modern computations in Sciences and

for the objective characteristics of that country. This effect is stronger for good that are more trust intensive and doubles or triples when trust is instrumented with its cultural determinants. We conclude that perceptions rooted in culture are important (and generally omitted) determinants of economic exchange

Tracker soft-ware system is presented. The system is shown effective through multiple proxy deploy-

mcmxciv This thesis deals with combinatorics in connection with Coxeter groups, finitely generated but not necessarily finite. The representation theory of groups as nonsingular matrices over a field is of immense theoretical importance, but also basic for computational group theory, where the group elements are data structures in a computer. Matrices are unnecessarily large structures, and part of this thesis is concerned with small and efficient representations of a large class of Coxeter groups (including most Coxeter groups that anyone ever payed any attention to.) The main contents of the thesis can be summarized as follows. • We prove that for all Coxeter graphs constructed from an n-path of unlabelled edges by adding a new labelled edge and a new vertex (sometimes two new edges and vertices), there is a permutational representation of the corresponding group. Group elements correspond to integer n-sequences and the nodes in the path generate all n! permutations. The extra node has a more complicated action, adding a certain quantity to some of the numbers.

design issues. More specically, we propose the messaging architecture SMA that consists of three components: trafc-adaptive link estimation and routing (TLR), application-adaptive structuring (AST), and application-adaptive scheduling (ASC). TLR deals with dynamic wireless links as well as the impact