An alternative method for port decoupling and matching of arrays with small inter-element spacing is proposed. The approach is based on the inherent decoupling effect obtained by feeding the eigenmodes of the array. For this purpose, a modal feed network is introduced. The decoupled external ports of the feed network may individually be matched using conventional matching circuits. Such a syste...

External SDD systems can also replace Si(Li) detectors on existing microscopes and offer many of the advantages of the in-situ SDD systems. Since the SDDs do not operate at liquid nitrogen temperatures, the insulation gaps in the nosepiece/collimator assemblies can be reduced or eliminated. Also, the detector window and the associated support frame are no longer used. This means that the detect...

In this paper, we apply Dirac structures and the associated theory of implicit Lagrangian systems to electric networks. We show how a Dirac structure on the flux linkage phase space can be induced from a KCL (Kirchhoff Current Law) constraint distribution on a configuration charge space in analogy with mechanics. In this context, a notion of implicit port–controlled Lagrangian systems is develo...

This paper describes a free filesystem for external flash memory to be employed with low-complexity sensor nodes. The system uses a standard secure digital (SD) card that can be easily connected to the serial port interface (SPI) or any general input/output port of the sensor’s processor. The filesystem is evaluated with SDcards used in SPI mode and achieves an average random write throughput o...

This paper presents the structural analysis of a port community system (PCS) and its main stakeholders, both internal and external, who are involved in the execution of port business activities. Typical information and telecommunications infrastructure of a PCS is outlined, along with the main challenges in its introduction. Furthermore, a significant emphasis is put on information security wit...

The javax.comm package provides basic low-level access between Java programs and external input-output devices, in particular, serial devices. Such communications are handled using event listener technology similar to that used in the AWT package. Using the JCSP implementation of active AWT components as a model, we have constructed an active serial port (ASP), using javax.comm, that gives a ch...

background port site complications following elective surgery are rare and port site infections remain the most common short long term complications. objectives the study was conducted to analyze port site complications occurring in patients undergoing laparoscopic cholecystectomy for symptomatic cholelithiasis. patients and methods ninety patients undergoing laparoscopic cholecystectomy were r...

Arbitrary interconnections of passive (possibly nonlinear) resistors, inductors, and capacitors define passive systems, with power port variables the external source voltages and currents, and storage function the total stored energy. In this paper, we identify a class of RLC circuits (with convex energy function and weak electromagnetic coupling), for which it is possible to “add a differentia...

Human bites of the face are common in Port Harcourt, Nigeria. Twenty-four such patients with tissue losses seen over a period of two years (1983-1985) at the University of Port Harcourt Teaching Hospital were studied. Women in their third decade of life seem to be most at risk; the lips and ears are most frequently bitten. Primary repair and administration of systemic antibiotics within 24 hour...

In this paper we consider the problem of designing a container liner shipping feeder network. The designer has to choose which port to serve during many rotations that start and end at a central hub. Many operational characteristics are considered, such as variable leg-by-leg speeds and cargo transit times. Realistic instances are generated from the LinerLib benchmark suite. The problem is solv...