NNLO Corrections to the Polarized Drell-Yan Coefficient Function

We present the full next-to-next-to-leading order (NNLO) corrections to the coefficient function for the polarized cross section $d \Delta\sigma/d Q$ of the Drell-Yan process. We study the effect of these corrections on the process $p+p\to l^+l^-+`X'$ at an C.M. energy $\sqrt{S}=200 GeV$. All QCD partonic subprocesses have been included provided the lepton pair is created by a virtual photon, which is a valid approximation for a lepton pair invariant mass $Q<50 GeV$. For this reaction the dominant subprocess is given by $q+\bar q\to \gamma^*+`X'$ and its higher order corrections so that it provides us with an excellent tool to measure the polarized sea-quark densities.Comment: 5 pages, 5 figures, 7th DESY Workshop on Elementary Particle Theory, Loops and Legs in Quantum Field Theory, Zinnowitz, Germany, April 25-30, 200

On Completely Mixed Stochastic Games

In this paper, we consider a zero-sum undiscounted stochastic game which has finite state space and finitely many pure actions. Also, we assume the transition probability of the undiscounted stochastic game is controlled by one player and all the optimal strategies of the game are strictly positive. Under all the above assumptions, we show that the $\beta$-discounted stochastic games with the same payoff matrices and $\beta$ sufficiently close to 1 are also completely mixed. We give a counterexample to show that the converse of the above result in not true. We also show that, if we have non-zero value in some state for the undiscounted stochastic game then for $\beta$ sufficiently close to 1 the $\beta$-discounted stochastic game also possess nonzero value in the same state

Adaptive Resource Management in Asynchronous Real-time Distributed Systems Using Feedback Control Functions

Presents feedback control techniques for performing adaptive resource management in asynchronous real-time distributed systems. Such systems are characterized by significant execution time uncertainties in the application environment and system resource state. Thus, such systems require adaptive resource management that dynamically monitor the system for adherence to the desired real-time requirements and perform run-time adaptation of the application to changing workloads when unacceptable timeliness behavior is observed. We propose adaptive resource management techniques that are based on feedback control theory. The controllers solve resource allocation problems that arise during run-time adaptation using the classical proportional-integral-derivative (PID) control functions. We study the performance of the controllers through simulation. The simulation results indicate that the controllers produce low missed deadline ratios and resource utilizations during situations of high workloads

Intelligent Feedback Control-based Adaptive Resource Management for Asynchronous, Decentralized Real-time Systems

Presents intelligent feedback control techniques for adaptive resource management in asynchronous, decentralized real-time systems. We propose adaptive resource management techniques that are based on feedback control theory and are designed using the intelligent control design paradigm. The controllers solve resource allocation problems that arise during run-time adaptation using the classic proportional-integral-derivative (PID) control functions and fuzzy logic. We study the performance of the controllers through simulation. The simulation results indicate that the controllers produce low missed deadline ratios and resource utilizations during high-workload situations

Orderfield property of mixtures of stochastic games

We consider certain mixtures, &#915;, of classes of stochastic games and provide sufficient conditions for these mixtures to possess the orderfield property. For 2-player zero-sum and non-zero sum stochastic games, we prove that if we mix a set of states S1 where the transitions are controlled by one player with a set of states S2 constituting a sub-game having the orderfield property (where S1&#8745;S2=&#8709;), the resulting mixture &#915; with states S=S1&#8746;S2 has the orderfield property if there are no transitions from S2 to S1. This is true for discounted as well as undiscounted games. This condition on the transitions is sufficient when S1 is perfect information or SC (Switching Control) or ARAT (Additive Reward Additive Transition). In the zero-sum case, S1 can be a mixture of SC and ARAT as well. On the other hand,when S1 is SER-SIT (Separable Reward - State Independent Transition), we provide a counter example to show that this condition is not sufficient for the mixture &#915; to possess the orderfield property. In addition to the condition that there are no transitions from S2 to S1, if the sum of all transition probabilities from S1 to S2 is independent of the actions of the players, then &#915; has the orderfield property even when S1 is SER-SIT. When S1 and S2 are both SERSIT, their mixture &#915; has the orderfield property even if we allow transitions from S2 to S1. We also extend these results to some multi-player games namely, mixtures with one player control Polystochastic games. In all the above cases, we can inductively mix many such games and continue to retain the orderfield property

Orderfield property and algorithms for stochastic games via dependency graphs

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ANTIBACTERIAL ACTIVITY OF SELECTED MEDICINAL PLANT IN TRADITIONAL TREATMENT OF WOUND INFECTION IN SOUTHEAST INDIA

Objective: The wound healing potential of fruit peel of Pithecellobium dulce Benth, a plant traditionally used for wound treatment against wound- infecting bacteria, was assessed using disc diffusion and microtitre plate methods. Methods: P. dulce fruit peel was extracted using ethyl acetate, methanol and water and tested for their antimicrobial activities against bacterial isolates from wound infection using disc diffusion and microtitre plate methods. Results: All the three extracts had antimicrobial activities, among which methanol extract had higher activities against all the tested organisms compared to the ethyl acetate and aqueous extracts. The most susceptible organism to all the extracts was K. pneumonia and S. aureus while the most resistant were P. mirabilis and P. vulgaris. Conclusion: The potential antibacterial activity of P. dulce plant against both gram-positive and gram-negative bacteria justifies the use of the plant as the wound healing agent. The isolation of active principle of this plant may serve as source and lead for the synthesis of drugs in pharmaceutical industries