45,876 research outputs found
A case study of MMO2's Madic: A framework for creating mobile internet systems
Mobile Internet applications on ubiquitous mobile networks allows real-time, anywhere, anytime connectivity to services. Due to its scalability and potential cost savings, mobile communication is being increasingly applied in the business and consumer communities to create innovative data and voice application, which run over the Internet infrastructure. This paper reports on a case study at an organisation that created an innovative approach to developing mobile applications developed by third party independent developers. A conceptual wireless reference model is presented that was used to define the various system components required to create effective mobile applications
Single Heavy Flavour Baryons using Coulomb plus Power law interquark Potential
Properties of single heavy flavor baryons in a non relativistic potential
model with colour coulomb plus power law confinement potential have been
studied. The ground state masses of single heavy baryons and the mass
difference between the ( and ) states are
computed using a spin dependent two body potential. Using the spin-flavour
structure of the constituting quarks and by defining an effective confined mass
of the constituent quarks within the baryons, the magnetic moments are
computed. The masses and magnetic moments of the single heavy baryons are found
to be in accordance with the existing experimental values and with other
theoretical predictions. It is found that an additional attractive interaction
of the order of -200 Me is required for the antisymmetric states of
(Q. It is also found that the spin hyperfine
interaction parameters play decisive role in hadron spectroscopy.Comment: 16 Pages, 3 Figures, Paper submitted in EPJ
Dynamic analysis using superelements for a large helicopter model
Using superelements (substructures), modal and frequency response analysis was performed for a large model of the Advanced Attack Helicopter developed for the U.S. Army. Whiffletree concept was employed so that the residual structure along with the various superelements could be represented as beam-like structures for economical and accurate dynamic analysis. A very large DMAP alter to the rigid format was developed so that the modal analysis, the frequency response, and the strain energy in each component could be computed in the same run
Significance of foundation-soil separation in dynamic soil-structure interaction
THe dynamic response of flexible surface strip-foundations allowed to uplift is numerically obtained for externally applied forces of a transient time variation. The soil medium is represented by an isotropic, homogeneous and linear half-space. The soil is treated by a time domain boundary element method, while the flexible foundation is treated by the finite element method. It was concluded that intermediate relative stiffness leads to moderate deformations when uplift is permitted. Very flexible footings produce higher deformations in unilateral contact compared to bilateral contact, and thus should be considered in their design. Unilateral contact does not significantly increase deformations for stiff footings subjected to concentrated central loading. However, relatively large deformation differences occur when the loading is eccentric, necessitating consideration of uplift in their design
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