239 research outputs found
Marginal and non-commutative deformations via non-abelian T-duality
In this short article we develop recent proposals to relate Yang-Baxter sigma-models and non-abelian T-duality. We demonstrate explicitly that the holographic space-times associated to both (multi-parameter)-Ī²-deformations and non-commutative deformations of Nīŗ=4 super Yang-Mills gauge theory including the RR fluxes can be obtained via the machinery of non-abelian T-duality in Type II supergravity
Impedimetric Detection and Electromediated Apoptosis of Vascular Smooth Muscle Using Microfabricated Biosensors for Diagnosis and Therapeutic Intervention in Cardiovascular Diseases
Cardiovascular diseases remain a significant global burden with 1āinā3 of all deaths attributable to the consequences of the disease. The main cause is blocked arteries which often remain undetected. Implantable medical devices (IMDs) such as stents and grafts are often used to reopen vessels but over time these too will reāblock. A vascular biosensor is developed that can report on cellularity and is amenable to being mounted on a stent or graft for remote reporting. Moreover, the device is designed to also receive currents that can induce a controlled form of cell death, apoptosis. A combined diagnostic and therapeutic biosensor would be transformational for the treatment of vascular diseases such as atherosclerosis and central line access. In this work, a cell sensing and cell apoptosing system based on the same interdigitated electrodes (IDEs) is developed. It is shown that the device is scalable and that by miniaturizing the IDEs, the detection sensitivity is increased. Apoptosis of vascular smooth muscle cells is monitored using continuous impedance measurements at a frequency of 10 kHz and rates of cell death are tracked using fluorescent dyes and live cell imaging
Processes, Roles and Their Interactions
Taking an interaction network oriented perspective in informatics raises the
challenge to describe deterministic finite systems which take part in networks
of nondeterministic interactions. The traditional approach to describe
processes as stepwise executable activities which are not based on the
ordinarily nondeterministic interaction shows strong centralization tendencies.
As suggested in this article, viewing processes and their interactions as
complementary can circumvent these centralization tendencies.
The description of both, processes and their interactions is based on the
same building blocks, namely finite input output automata (or transducers).
Processes are viewed as finite systems that take part in multiple, ordinarily
nondeterministic interactions. The interactions between processes are described
as protocols.
The effects of communication between processes as well as the necessary
coordination of different interactions within a processes are both based on the
restriction of the transition relation of product automata. The channel based
outer coupling represents the causal relation between the output and the input
of different systems. The coordination condition based inner coupling
represents the causal relation between the input and output of a single system.
All steps are illustrated with the example of a network of resource
administration processes which is supposed to provide requesting user processes
exclusive access to a single resource.Comment: In Proceedings IWIGP 2012, arXiv:1202.422
76-81 GHz Millimeter Wave Radar Sea Surface and Maritime Target Measurements
Imaging radar measurements of sea surface clutter/reflections and targets of opportunity in the 76-81 GHz frequency band. Part of the University of Birmingham data collection for the EPSRC funded STREAM project (EP/S033238/1)
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