3,197 research outputs found
Daniel DeRyke and a Continuous Connection to WMU
WMU Alum Daniel DeRyke meets virtually over Zoom with Cassie Kotrch to share some of his memories and stories of his connection to WMU and his time as a student at the College of Business while it was on East Campus
A novel middleware for the mobility management over the Internet
The features of mobility, which enormously impact on how communication is evolving into the future, represent a particular challenge in today’s wireless networking research. After an identification and evaluation of the gap between the discontinuities of the communication service inherent to the physical layer of mobile networks and the continuity requirements issue from the stream centric multimedia applications, we propose a novel middleware 3MOI (Middleware for the Mobility Management Over the Internet) which can perform efficient and context-aware mobility management and satisfy new mobility requirements such as dynamical location management, fast handover, and continuous connection support
From the zero-field metal-insulator transition in two dimensions to the quantum Hall transition: a percolation-effective-medium theory
Effective-medium theory is applied to the percolation description of the
metal-insulator transition in two dimensions with emphasis on the continuous
connection between the zero-magnetic-field transition and the quantum Hall
transition. In this model the system consists of puddles connected via saddle
points, and there is loss of quantum coherence inside the puddles. The
effective conductance of the network is calculated using appropriate
integration over the distribution of conductances, leading to a determination
of the magnetic field dependence of the critical density. Excellent
quantitative agreement is obtained with the experimental data, which allows an
estimate of the puddle physical parameters
Dynamics of a self-gravitating shell of matter
Dynamics of a self-gravitating shell of matter is derived from the Hilbert
variational principle and then described as an (infinite dimensional,
constrained) Hamiltonian system. A method used here enables us to define
singular Riemann tensor of a non-continuous connection {\em via} standard
formulae of differential geometry, with derivatives understood in the sense of
distributions. Bianchi identities for the singular curvature are proved. They
match the conservation laws for the singular energy-momentum tensor of matter.
Rosenfed-Belinfante and Noether theorems are proved to be still valid in case
of these singular objects. Assumption about continuity of the four-dimensional
spacetime metric is widely discussed.Comment: publishe
Towards a holographic quark-hadron continuity
We study dense nuclear and quark matter within a single microscopic approach,
namely the holographic Sakai-Sugimoto model. Nuclear matter is described via
instantons in the bulk, and we show that instanton interactions are crucial for
a continuous connection of chirally broken and chirally symmetric phases. The
continuous path from nuclear to quark matter includes metastable and unstable
stationary points of the potential, while the actual chiral phase transition
remains of first order, as in earlier approximations. We show that the model
parameters can be chosen to reproduce low-density properties of nuclear matter
and observe a non-monotonic behavior of the speed of sound as a function of the
baryon chemical potential, as suggested by constraints from QCD and
astrophysics.Comment: 28+19 pages, 5 figures; v2: clarifications and references added,
version to appear in JHE
Service Virtualisation of Internet-of-Things Devices: Techniques and Challenges
Service virtualization is an approach that uses virtualized environments to
automatically test enterprise services in production-like conditions. Many
techniques have been proposed to provide such a realistic environment for
enterprise services. The Internet-of-Things (IoT) is an emerging field which
connects a diverse set of devices over different transport layers, using a
variety of protocols. Provisioning a virtual testbed of IoT devices can
accelerate IoT application development by enabling automated testing without
requiring a continuous connection to the physical devices. One solution is to
expand existing enterprise service virtualization to IoT environments. There
are various structural differences between the two environments that should be
considered to implement appropriate service virtualization for IoT. This paper
examines the structural differences between various IoT protocols and
enterprise protocols and identifies key technical challenges that need to be
addressed to implement service virtualization in IoT environments.Comment: 4 page
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