Adopting Time-to-Live (TTL) based hierarchical caching systems is considered to be a viable approach to support Web content delivery under the weak consistency paradigm. However, with a strictly hierarchical structure in these systems, a single user request may trigger multiple consecutive miss events at cache servers of different levels. This undesirable miss synchronization can cause a sudden...

Identifying the mechanisms responsible for the formation of cirrus clouds is important in understanding the role of cirrus in the tropical atmosphere. Thin cirrus clouds near the tropical tropopause transition layer (TTL) can have significant impacts on the radiative heating in the upper troposphere. These clouds may also affect the transport of water vapor through the TTL into the stratosphere...

The temperature variations of the lattice parameter of the pseudoternary compounds Mn3Gal-,Al,C (x j 0.05) were measured by using of powder X-ray diffraction. The anomalies which correspond to the magnetic phase transitions were observed in the thermal expansion curves. The intermetallic compound MnaGaC is an ordered cubic crystal of a perovskite type structure. The magnetic properties are char...

Existing self-healing mechanisms for Web services constantly monitor services and their computational environment, analyze system state, determine failure occurrences, and execute built-in recovery plans (MAPE loop). We propose a more pro-active self healing mechanism that uses a multi-layer perceptron ANN and a health score mechanism to learn about the occurrences of failures or quality of ser...

This paper presents various formal techniques for analysis of executions of organizational scenarios based on process-oriented models of organizations. Process-oriented models describe (prescribe) ordering and timing relations on organizational processes, modes of use of resources, allocations of actors to processes etc. The actual execution may diverge from scenarios (pre)defined by a model. A...

Halogens produced by ocean biological and photochemical processes reach the tropical tropopause layer (TTL), where cold temperatures and the prevailing low ozone abundances favor the diurnal photochemical enhancement of halogen atoms. Under these conditions atomic bromine and iodine are modeled to be the dominant inorganic halogen species in the sunlit TTL, surpassing the abundance of the commo...

The integration of the internet and ad hoc mobile host can be used to eliminate dead zones in the wireless network, and can also be used to extend the coverage of wireless networks. This paper utilizes extended Ad hoc On Demand Distance Vector (AODV) for interconnection of MANET with Internet. An approach is presented to reduce the search cost; such as route discovery delay (RDD) and routing ov...

In peer-to-peer (P2P) systems where individual peers must cooperate to process each other’s requests, a useful metric for evaluating the system is how many remote requests are serviced by each peer. In this paper we apply this remote work metric to flooding-based P2P search networks such as Gnutella. We study how to maximize the remote work in the entire network by controlling the rate of query...

Title of Dissertation: THE EFFECT OF DEEP CONVECTION ON TEMPERATURES IN THE TROPICAL TROPOPAUSE LAYER AND ITS IMPLICATIONS TO THE REGULATION OF TOROPICAL LOWER STRATOSPHERIC HUMIDITY Hyun Cheol Kim, Doctor of Philosophy, 2005 Dissertation directed by: Dr. Andrew E. Dessler Department of Meteorology This dissertation focuses on the impact of deep convection on the thermal structure in the Tropic...