Abstract:
Results from the analysis of data obtained from the WA98 experiment at the CERN SPS have been presented. Some events have been filtered which show photon excess in limited $\eta-\phi$ zones within the overlap region of the charged particle and photon multiplicity detectors.

Abstract:
The sequential nature of the reactions in metabolic pathways means that they can be modeled in the form of a graph (network) of enzymes and chemical transformations, and network theory can be used to represent and understand metabolism [1,2]. The connected collection of metabolic pathways, describing the set of all enzymatic interc-onversions of one small molecule into another, is defined as the metabolic network of an organism (Figure 1a).The most commonly used network representations are 'metabolite-centric'. They consider metabolites as the nodes of the graph and two metabolites are linked if one can be converted into the other by an enzymatic reaction (Figure 1b, left). An alternative network representation is 'enzyme-centric'. It considers the enzymes as nodes and links enzymes that catalyze successive reactions (Figure 1b, right). Although several studies have provided insights into the structure and evolution of a metabolic network, very few have addressed the influence of environment on metabolic network structure in species from diverse environmental conditions. The availability of many completely sequenced genomes means that metabolic-network analysis can now be extended from a few model organisms to species from different branches of the tree of life and living in very different environments. This should enable the elucidation of general principles underlying metabolic networks.Two recent studies, published in the Proceedings of the National Academy of Sciences by Eytan Ruppin and colleagues (Kreimer et al. [3] and Borenstein et al. [4]), provide important insights into links between the environment of an organism and the structure of its metabolic network. Using data from a large number of bacterial metabolic networks, Kreimer et al. address the question of how the topologies of the metabolic networks from different species reflect both genome size and the diversity of environmental conditions the species would encounter. Borenstein et al. set out to ide

Abstract:
In recent years lot of interest has been observed in the nucleus-nucleus collisions at RHIC energies in phenomena related to high $p_{t}$ physics \cite{ref1}. The suppression of high $p_{t}$ particles and disappearance of back-to-back jets compared to the scaling with number of binary nucleon-nucleon collisions indicates that a nearly perfect liquid is produced in these collisions. Results on self shadowing of high $p_{t}$ events are presented using hadron multiplicity associated to high $p_{t}$ and unbiased events in nucleus-nucleus collisions \cite{ref2} obtained from the hijing event generator.

Abstract:
We have constructed a Lagrangian model (SIG-OM) with coupling of sigma and omega mesons in the relativistic mean-field theory. Properties of finite nuclei and nuclear matter have been explored with the new Lagrangian model. The study shows that with SIG-OM an excellent description of binding energies and charge radii of nuclei over a large range of isospin is achieved. With an incompressibility of nuclear matter K=265 MeV, it is also able to describe the breathing-mode isoscalar giant monopole resonance energies appropriately. It is shown that the high-density behaviour of the equation of state of nuclear and neutron matter with the sigma-omega coupling is significantly softer than the non-linear scalar coupling model.

Abstract:
This paper presents a motion control strategy for a rigid and constraint consistent formation that can be modeled by a directed graph whose each vertex represents individual agent kinematics and each of directed edges represents distance constraints maintained by an agent, called follower, to its neighbouring agent. A rigid and constraint consistent graph is called persistent graph. A persistent graph is minimally persistent if it is persistent, and no edge can be removed without losing its persistence. An acyclic (free of cycles in its sensing pattern) minimally persistent graph of Leader-Follower structure has been considered here which can be constructed from an initial Leader-Follower seed (initial graph with two vertices, one is Leader and another one is First Follower and one edge in between them is directed towards Leader) by Henneberg sequence (a procedure of growing a graph) containing only vertex additions. A set of nonlinear optimization-based decentralized control laws for mobile autonomous point agents in two dimensional plane have been proposed. An infinitesimal deviation in formation shape created continuous motion of Leader is compensated by corresponding continuous motion of other agents fulfilling the shortest path criteria. 1. Introduction There are several examples of coordinated team work of mobile agents in nature like food foraging by a group of ants, flocking birds, fish schooling for protection from enemies, and so forth. These examples give us a lesson that a particular task accomplished by a single mobile autonomous agent (like fish and birds) may be done more efficiently by a group of agents if they perform in a collaborative manner. During last thirty years or more, this fact has motivated many researchers in the field of control and automation significantly to contribute in several similar applications in industry. In some particular applications during their motion as whole, autonomous agents (e.g., robots, vehicles, etc.) need to maintain a particular geometrical shape for cohesive motion, called formation which satisfies some constraints like desired distance between two agents, desired angle between two lines joining two agents each. Examples of these types of formations are found in collective attack by a group of combat aircraft, search/rescue/surveillance/cooperative transportation by a troop of robots, underwater exploration/underwater inspection (like pipeline inspection) by a group of Autonomous Underwater Vehicles, attitude alignment of clusters of satellites, air traffic management system, automated highway

Abstract:
Let A1, A2 be commutative semisimple Banach algebras and A1 ￠ — ￠ A2 be their projective tensor product. We prove that, if A1 ￠ — ￠ A2 is a group algebra (measure algebra) of a locally compact abelian group, then so are A1 and A2. As a consequence, we prove that, if G is a locally compact abelian group and A is a comutative semi-simple Banach algebra, then the Banach algebra L1(G,A) of A-valued Bochner integrable functions on G is a group algebra if and only if A is a group algebra. Furthermore, if A has the Radon-Nikodym property, then the Banach algebra M(G,A) of A-valued regular Borel measures of bounded variation on G is a measure algebra only if A is a measure algebra.

Abstract:
The present paper aims at studying a queuing model with two stage heterogeneousservice where customer arrival is in batches and has a single server providing servicein two stages, one after the other in succession. A service is said to be completedwhen both services are done. Also the server is assumed to go for vacation aftercompletion of the two stages of service with probability p or may continue servingthe next customer with probability (1-p). In addition, we have included balking whichreflects customer’s impatient behavior where an arriving batch decides not to join thequeue for some reasons. We also added optional re-service where a customer mayrequire re-service for any of the services or depart from the system once service iscompleted. We derive the steady state queue size distribution and discuss somespecial cases.

Abstract:
In this brief paper the probability density of a random real, complex and quaternion determinant is rederived using singular values. The behaviour of suitably rescaled random determinants is studied in the limit of infinite order of the matrices.

The title compound, C_{21}H_{15}FN_{4}O_{2}is synthesized and characterized by ^{1}H NMR, LC-MS and
finally confirmed by single crystal X-ray diffraction method. This molecule
crystallizes in the monoclinic crystal system and space group P21/c, with crystal parameters a = 9.4386(5) A, b = 20.8082(1) A, c = 9.4338(6) A, β =
99.566(2)^{0}, Z = 4 and V = 1826.98(19) A^{3}.The mean
planes of fluro-phenyl moiety makes a dihedral angle of 21.51 (7)^{
}

Abstract:
We study a vacation queueing system with a single server simultaneously dealing with an M/G/1 and an M/D/1 queue. Two classes of units, priority and non-priority, arrive at the system in two independent Poisson streams. Under a non-preemptive priority rule, the server provides a general service to the priority units and a deterministic service to the non-priority units. We further assume that the server may take a vacation of random length just after serving the last priority unit present in the system. We obtain steady state queue size distribution at a random epoch. Corresponding results for some special cases, including the known results of the M/G/1 and the M/D/1 queues, have been derived.