134 research outputs found
Inner multipliers and Rudin type invariant subspaces
Let be a Hilbert space and be
the -valued Hardy space over the unit disc in
. The well known Beurling-Lax-Halmos theorem states that every
shift invariant subspace of other than
has the form , where is an
operator-valued inner multiplier in for some Hilbert space . In this
paper we identify with -valued Hardy
space and classify all such inner
multiplier for which is a Rudin type invariant subspace of
.Comment: 8 page
Convergence of tail sum for records
Suppose {Rn(L) (F): n≥1} is the sequence of lower records from a distribution F, where F is continuous with inf {x ∈ supp(F)}=0. We derive conditions under which logarithm of the tail sum of records, ∑ j=n ∞=Rn (L) (F), properly centered and scaled, converge weakly. We also prove two results on ?-varying and regularly varying functions, which are of independent interest
A Goal Driven Framework for Service Discovery in Service-Oriented Architecture: A Multiagent Based Approach
Automated service discovery is one of the very important features in any Semantic Web Service (SWS) based framework. Achieving this functionality in e-resource sharing system is not an easy task due to its hugeness and heterogeneity among the available resources. Any efficient automated service discovery will remain worthless until discovered services fulfill the required goal(s) demanded by the user or the client program. In this paper we have proposed a goal driven approach towards an automated service discovery using Agent Swarm in an innovative way .A novel multi agent based architecture has been introduced here for service discovery. Communications among the agent in service-oriented framework for the said purpose has also been illustrated here. Finally, the pictorial view of the running agent in the system is shown
Bibliographic Data Migration from LibSys to Koha : Experience at St. Xavier’s College, Kolkata
Data migration is a process of transferring data from existing system to another system and it is divided into two processes: (a) extracting data from an existing system into an extracted file and (b) loading data from extracted file into the new system. Before data migration procedure first you check the database structure and tables of the koha software. After checking the data format, collect data from the libsys software. It includes bibliographical details of the documents, items details, transaction records and patron details. Then using MarcEdit software collected data has been formatted as per the koha software data base structure. Using koha’s data import facility data are uploaded to koha database. Last and most important step is the checking data consistency. This step completes the data migration procedure and certified the koha to be run independently.
In this paper we tried to explain the step by step method of bibliographic data migration from libsys to koha, checking data consistency and the problems faced during data migratio
Tripartite entanglement detection through tripartite quantum steering in one-sided and two-sided device-independent scenarios
In the present work, we study tripartite quantum steering of quantum
correlations arising from two local dichotomic measurements on each side in the
two types of partially device-independent scenarios: -sided
device-independent scenario where one of the parties performs untrusted
measurements while the other two parties perform trusted measurements and
-sided device-independent scenario where one of the parties performs trusted
measurements while the other two parties perform untrusted measurements. We
demonstrate that tripartite steering in the -sided device-independent
scenario is weaker than tripartite steering in the -sided device-independent
scenario by using two families of quantum correlations. That is these two
families of quantum correlations in the -sided device-independent framework
detect tripartite entanglement through tripartite steering for a larger region
than that in the -sided device-independent framework. It is shown that
tripartite steering in the -sided device-independent scenario implies the
presence of genuine tripartite entanglement of quantum
system, even if the correlation does not exhibit genuine nonlocality or genuine
steering.Comment: 14 pages, 4 figures, accepted for publication in Physical Review
Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines
The present study deals with the utilization of fines generated from comminution process (crushing, grinding and screening) of the Run of Mines into value added products i.e. fluxed iron ore pellets. The study comprises to understand the physical and mechanical behavior of five distinguished chemical compositions of green and dried iron ore pellets with respect to a typical Mini Blast furnace (MBF) burden data and furnace operating parameter. The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at 100% high ash coke (avg. ash content= 29%). The crushing strength and drop number of various green pellets were measured. Green Crushing Strength was decreased with increasing lime fines. The addition of lime fines as a burnt lime, which has acicular structure creates less plasticity and brittle like fracture occurred. Due to formation of hard CaCO3 layer on the surface, after increasing lime contain crushing strength was increased in the air and oven dry pellets with respect to acid pellet (0% lime fines addition). [How to cite this article: Sarkar, A., Mandal, A.K., and Sinha, O.P. (2013) Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines. International Journal of Science and Engineering, 5(2),9-14. Doi: 10.12777/ijse.5.2.9-14
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ELMO1 has an essential role in the internalization of Salmonella Typhimurium into enteric macrophages that impacts disease outcome.
Backgrounds and aims4-6 million people die of enteric infections each year. After invading intestinal epithelial cells, enteric bacteria encounter phagocytes. However, little is known about how phagocytes internalize the bacteria to generate host responses. Previously, we have shown that BAI1 (Brain Angiogenesis Inhibitor 1) binds and internalizes Gram-negative bacteria through an ELMO1 (Engulfment and cell Motility protein 1)/Rac1-dependent mechanism. Here we delineate the role of ELMO1 in host inflammatory responses following enteric infection.MethodsELMO1-depleted murine macrophage cell lines, intestinal macrophages and ELMO1 deficient mice (total or myeloid-cell specific) was infected with Salmonella enterica serovar Typhimurium. The bacterial load, inflammatory cytokines and histopathology was evaluated in the ileum, cecum and spleen. The ELMO1 dependent host cytokines were detected by a cytokine array. ELMO1 mediated Rac1 activity was measured by pulldown assay.ResultsThe cytokine array showed reduced release of pro-inflammatory cytokines, including TNF-α and MCP-1, by ELMO1-depleted macrophages. Inhibition of ELMO1 expression in macrophages decreased Rac1 activation (~6 fold) and reduced internalization of Salmonella. ELMO1-dependent internalization was indispensable for TNF-α and MCP-1. Simultaneous inhibition of ELMO1 and Rac function virtually abrogated TNF-α responses to infection. Further, activation of NF-κB, ERK1/2 and p38 MAP kinases were impaired in ELMO1-depleted cells. Strikingly, bacterial internalization by intestinal macrophages was completely dependent on ELMO1. Salmonella infection of ELMO1-deficient mice resulted in a 90% reduction in bacterial burden and attenuated inflammatory responses in the ileum, spleen and cecum.ConclusionThese findings suggest a novel role for ELMO1 in facilitating intracellular bacterial sensing and the induction of inflammatory responses following infection with Salmonella
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