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This paper investigates the use of ultra-wideband (UWB) radio for communication in industrial wireless sensor networks (WSNs). OpenWSN is an open-source IPv6 mesh network protocol stack based on IEEE 802.15.4 time slotted channel hopping (TSCH). We adapted OpenWSN to operate an UWB physical layer based on the DecaWave DW1000 UWB transceiver. Experiments were conducted in an industrial steam heating...
Traditional railway signalling and control systems have been based on fixed block train separation and lineside signals to control the movement of trains and to avoid collisions. This has historically led to a segregation of the functionalities of sub-systems such as signalling, rolling stock and control centres, with the development and delivery of each subsystem being developed and delivered with...
Omni-directional GeTe inline phase-change switches (IPCS) have been fabricated and heterogeneously integrated with commercial SiGe BiCMOS technology to create a reconfigurable receiver. The reconfigurable receiver required integrating thirteen (13) 8-port and two (2) 4-port omni-directional switch circuits with a commercial SiGe IC, requiring very stable and repeatable performance from the 112 integrated...
The highly pulsatile flow conditions in the arch of aorta and the branching nature of this anatomy create a complex flow regime that catheter-based surgical devices and left heart medical devices may impact. Disturbance of flow to the carotid arteries, which lead to the brain, may result in hypoxic conditions or elevated blood pressure that may result in stroke. The severity of these issues necessitates...
For the purposes of analyzing the possible impact of external factors on the performance and reliability of a left ventricular assist device (LVAD), a pulmonary simulator would be critical for in vitro use within a mock circulatory loop (MCL). To accurately reproduce the conditions within the pulmonary system, a pulmonary simulator should not only account for the capacity of the pulmonary system to...
Clinical evidence indicates that left ventricular assist device (LVAD) recipients present a diverse cohort of pathophysiology and cardiac functionality. The challenge of assuring device safety and proper performance in this patient set represents a challenge in both the range and resolution of the conditions. Furthermore, the cardiovascular systems of these individuals are highly susceptible to events...
Typical in vitro analysis of medical device performance occurs at room temperature (~70 degrees Fahrenheit). Effective evaluation requires at temperature studies for blood contacting medical devices for the following purposes: wear characteristics, thermal expansion, and temperature effects on sensors in the design. The task was to control the fluid within an ISO5198 hydraulic loop used to evaluate...
For modeling proteins in conformational states, two methods of representation are used: internal coordinates and Cartesian coordinates. Each of these representations contain a large amount of structural and simulation information. Different processing steps require one or the other representation. Our goal is to rapidly translate between these coordinate spaces so that a scientist can choose whichever...
Cyclotron coupling between electrons and waves is thought to occur in both polar and equatorial regions of the Earth's magnetosphere. The cyclotron emissions from an electron beam moving into a waveguide with an increasing magnetic field have been investigated in an experiment1, scaled to microwave frequencies, supported by numerical simulation2,3 and theoretical analysis, to reproduce aspects of...
International standards are now available for organisations that are wishing to implement a systematic approach to asset management. These standards include ISO 55001 (“Asset management -Management systems - Requirements”) and ISO 55002 (“Asset management -Management systems -Guidelines for the application of ISO 55001”). One section of ISO 55001 identifies the important role of information requirements...
Linking technology management to the business strategy and the strategic product planning process leads to competitive advantage and offers sustainable success in global markets. Technology management as a cross-departmental function handles a lot of tools for all kinds of purposes. Based on established tools, the paper illustrates the links between the two domains and investigates the information...
• UKCeB — UK Council for Electronic Business — MOD & Industry — Joint Chairs of Information Management Working Group •UK MOD ACDS(Log Ops) — logistic process architect — customer •ISO/TC184/SC4/WG13 —Industrial Data Quality — developing ISO 8000 (Data Quality) — Convener •LSC Group — supplier of through-life systems engineering services
Laboratory experiments and numerical simulations are reported that study cyclotron emission processes and the radiation inhibition by background plasma.
The auroral density cavity (a region of partial plasma depletion situated at an altitude of around 3200km at the Earth's pole) has been studied to have a background plasma density ∼106m−3, and plasma frequency ∼9kHz. Auroral Kilometric Radiation (AKR) is produced when particles descend through this region and are magnetically compressed as they approach the Earth's magnetosphere and through conservation...
During the transit of an electron beam through a background plasma, instabilities can occur that may result in highly dynamic behaviour. This behaviour may be important in fast-ignition inertial confinement fusion. In one method of this type of fusion, a deuterium-tritium pellet is compressed by lasers to very high densities. An ignition laser pulse then interacts with a directional gold cone to produce...
In a Fast Ignition approach to achieving inertial confinement fusion (ICF) the processes of thermonuclear fuel compression and ignition are separated. The fusion fuel is partially compressed with a primary series of long-pulse, high energy lasers and in one scheme a single high power, short-pulse laser is used to drive a stream of energetic electrons into the core of the plasma to heat and ignite...
Continuing experiments with electric oxygen-iodine laser (ElectricOIL) technology have significantly increased laser power output by increasing the product of gain and gain-length, . The authors report on progress with recent ElectricOIL devices utilizing a new concentric discharge geometry with improved production at higher discharge operating pressure at higher system...
Transfer of knowledge through educational games is emphasized within the last decades to support the knowledge construction process, irrespective of the declining attention of the new scientific generation. With the research driven nature of founded projects at university, the challenge of knowledge transfer is even intensified by its specific and abstract character. This paper concentrates on the...
A survey on the landscape of self-adaptive systems identified testing and assurance as one of the most neglected areas in the engineering of autonomic software. However, since the structure and behavior of autonomic software can vary during its execution, runtime testing is critical to ensure that faults are not introduced into the system as a result of dynamic adaptation. Some researchers have developed...
Autonomic and adaptive computing systems can add, remove, and replace their own components in response to a changing environment. Self-adaptation facilitates the performance of automated maintenance and configuration tasks, but makes it possible for faults to be introduced into the software at runtime. To address this issue, researchers have developed approaches for integrating runtime testing into...
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