Fundamental Assumption

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T Chown - One of the best experts on this subject based on the ideXlab platform.

  • source specific multicast ssm with ipv6
    Symposium on Applications and the Internet, 2005
    Co-Authors: S Venaas, T Chown
    Abstract:

    Source-Specific Multicast (SSM) is a more recent form of IP Multicast compared to the traditional Any Source Multicast (ASM) model. In making a Fundamental Assumption that there is only a single source in a specific Multicast group, simplifications can be made that lead to a new form of multicast that should be easier to deploy than ASM. The 6NET and Euro6IX projects have been at the forefront of SSM testing and deployment. In this paper we describe the results of work undertaken in these projects.

  • SAINT Workshops - Source Specific Multicast (SSM) with IPv6
    2005 Symposium on Applications and the Internet Workshops (SAINT 2005 Workshops), 1
    Co-Authors: S Venaas, T Chown
    Abstract:

    Source-Specific Multicast (SSM) is a more recent form of IP Multicast compared to the traditional Any Source Multicast (ASM) model. In making a Fundamental Assumption that there is only a single source in a specific Multicast group, simplifications can be made that lead to a new form of multicast that should be easier to deploy than ASM. The 6NET and Euro6IX projects have been at the forefront of SSM testing and deployment. In this paper we describe the results of work undertaken in these projects.

S Venaas - One of the best experts on this subject based on the ideXlab platform.

  • source specific multicast ssm with ipv6
    Symposium on Applications and the Internet, 2005
    Co-Authors: S Venaas, T Chown
    Abstract:

    Source-Specific Multicast (SSM) is a more recent form of IP Multicast compared to the traditional Any Source Multicast (ASM) model. In making a Fundamental Assumption that there is only a single source in a specific Multicast group, simplifications can be made that lead to a new form of multicast that should be easier to deploy than ASM. The 6NET and Euro6IX projects have been at the forefront of SSM testing and deployment. In this paper we describe the results of work undertaken in these projects.

  • SAINT Workshops - Source Specific Multicast (SSM) with IPv6
    2005 Symposium on Applications and the Internet Workshops (SAINT 2005 Workshops), 1
    Co-Authors: S Venaas, T Chown
    Abstract:

    Source-Specific Multicast (SSM) is a more recent form of IP Multicast compared to the traditional Any Source Multicast (ASM) model. In making a Fundamental Assumption that there is only a single source in a specific Multicast group, simplifications can be made that lead to a new form of multicast that should be easier to deploy than ASM. The 6NET and Euro6IX projects have been at the forefront of SSM testing and deployment. In this paper we describe the results of work undertaken in these projects.

Wei-ren Chen - One of the best experts on this subject based on the ideXlab platform.

  • Quantitative examination of a Fundamental Assumption in small-angle neutron scattering studies of deformed polymer melts
    Polymer, 2020
    Co-Authors: Yangyang Wang, Weiyu Wang, Kunlun Hong, Wei-ren Chen
    Abstract:

    Abstract It has long been established that the coherent scattering intensity of neutrons by isotropic mixtures of hydrogenous and deuterated polymers of matching molecular weights is, to the first approximation, proportional to the single-chain structure factor of the polymer chain. The validity of this Fundamental relation for equilibrium, undeformed polymer melts is well supported by the extensive experimental and theoretical investigations over the past several decades. The generalization of this relation to the case of nonequilibrium, deformed polymer melts, however, is not a trivial one. Despite its widespread usage in small-angle neutron scattering (SANS) studies of deformed polymer melts, the assumed proportionality between coherent scattering intensity and single-chain structure factor has received very little experimental scrutiny. This work quantitatively examines this issue through spherical harmonic expansion analysis of the anisotropic SANS spectra of deformed polystyrene melts of different levels of deuterium labeling. It is shown that the classical Assumption works extremely well over a wide range of scattering wavevectors, where the isotropic component of the SANS spectrum and the leading term of structural anisotropy vary by more than two orders of magnitude.

Yangyang Wang - One of the best experts on this subject based on the ideXlab platform.

  • Quantitative examination of a Fundamental Assumption in small-angle neutron scattering studies of deformed polymer melts
    Polymer, 2020
    Co-Authors: Yangyang Wang, Weiyu Wang, Kunlun Hong, Wei-ren Chen
    Abstract:

    Abstract It has long been established that the coherent scattering intensity of neutrons by isotropic mixtures of hydrogenous and deuterated polymers of matching molecular weights is, to the first approximation, proportional to the single-chain structure factor of the polymer chain. The validity of this Fundamental relation for equilibrium, undeformed polymer melts is well supported by the extensive experimental and theoretical investigations over the past several decades. The generalization of this relation to the case of nonequilibrium, deformed polymer melts, however, is not a trivial one. Despite its widespread usage in small-angle neutron scattering (SANS) studies of deformed polymer melts, the assumed proportionality between coherent scattering intensity and single-chain structure factor has received very little experimental scrutiny. This work quantitatively examines this issue through spherical harmonic expansion analysis of the anisotropic SANS spectra of deformed polystyrene melts of different levels of deuterium labeling. It is shown that the classical Assumption works extremely well over a wide range of scattering wavevectors, where the isotropic component of the SANS spectrum and the leading term of structural anisotropy vary by more than two orders of magnitude.

Ilya I. Kudish - One of the best experts on this subject based on the ideXlab platform.

  • Revision of a Fundamental Assumption in the Elastohydrodynamic Lubrication Theory and Friction in Heavily Loaded Line Contacts With Notable Sliding
    Journal of Tribology, 2015
    Co-Authors: Ilya I. Kudish
    Abstract:

    An analysis of the classic friction modeling in lubricated contacts is conducted. Its major deficiency for soft materials (low-elastic moduli) leading to significant overstating of friction in heavily loaded isothermal and thermal lubricated contacts is revealed. An improved model of friction in a heavily loaded lubricated contact is proposed. The model is based on incorporating the tangential displacements of the solid surfaces in contact, leading to a significant reduction of the frictional stress due to the decrease of the actual sliding of lubricated surfaces. Generally, this frictional stress reduction increases with the slide-to-roll ratio, and it is extremely important for high slide-to-roll ratios for which classic approaches lead to unrealistically overestimated values of frictional stresses. The high slide-to-roll ratio values can be found in many practical applications, such as clutches. Several examples of the frictional stress calculated based on this model as well as the comparison with the classical results are given for the case of smooth solid surfaces and lubricants with Newtonian rheology. Also, the results allow to take a look at the role and the necessity of considering thermal and lubricant non-Newtonian effects on solution of various EHL problems for such heavily loaded contacts.