We consider a two-queue polling model with switch-over times and k-limited service (serve at most k i customers during one visit period to queue i) in each queue. The major benefit of the k-limited service discipline is that it-besides bounding the cycle time-effectuates prioritization by assigning different service limits to different queues. System performance is studied in the heavy-traffic ...

A Data warehouse has its own set of challenges for security. Organizational data warehouse are often very large systems. Once we have extracted and loaded the data from heterogeneous sources we need to integrated the data as it seems to similar but coming from the different sources. Validation is required at all the design phases of the development of the data warehouse. With the rapid developm...

The present study aims at examining vocal expression of emotion. Emotionally loaded speech material produced by actors was analyzed with reference to the accuracy of articulation as well as to the duration of syllables and segments. It was investigated whether the vocal expression of several emotions (anger, happiness, fear and sadness) differ from one another and from neutral speech with respe...

Responsibility assignment modelling is concerned with developing a picture of how the responsibilities in a socio-technical system are distributed across the different automated elements and actors in that system. At this stage, we are not concerned with the details of the responsibilities themselves, nor with what the actors in the system have to do to discharge these responsibilities. Rather,...

Colloidal drug carrier is one of the most important entities essentially required for successful transport of loaded drugs. They are drug vectors, which sequester, transport and retain the active drug en route, while they elute or deliver it within or in the vicinity of target. Targeting the drug to the desired site of action would not only improve the therapeutic efficacy but also enable a red...

Central China is important for aerosols and climate because it is among the worst regions for air pollution in China. However, it is understudied due to a lag in establishing an atmospheric monitoring network. So we did a comprehensive analysis using multiple techniques to improve the understanding of aerosol optical properties and their radiative effect in this region. The results showed that ...

Article history: Received 28 January 2013 Received in revised form 20 August 2013 Accepted 10 April 2014 Available online 23 April 2014

The “richness” of properties that are indistinguishable from first-order properties is investigated. Indistinguishability is a concept of equivalence among properties of combinatorial structures that is appropriate in the context of testability. All formulas in a restricted class of second-order logic are shown to be indistinguishable from first-order formulas. Arbitrarily hard properties, incl...

Effective targeted drug delivery has been a long-held ambition but they are restricted in their utility due to several major drawbacks. The advent of nanotechnology lead to invention of many dosage forms, to circumvent the above limitations, a practical approach has been developed for the formation of discrete functionalized particles, which have been termed as ‘nanosponges’. Nanosponges are ti...