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We have previously identified several biomarkers of hepatocellular carcinoma (HCC). The levels of three of these biomarkers were analyzed individually and in combination with the currently used marker, alpha fetoprotein (AFP), for the ability to distinguish between a diagnosis of cirrhosis (n=113) and HCC (n=164). We have utilized several novel biostatistical tools, along with the inclusion of clinical...
Magnetic localization has been used in a variety of applications, including the medical field. Small magnetic tracers are often modeled as dipoles and localization has been achieved by solving well-defined dipole equations. However, in practice, the precise calculation of the tracer location not only depends on solving the highly nonlinear dipole equations through numerical algorithms but also on...
In the aviation industry, it may be necessary to employ a combination of Failure Finding Inspection (FFI) and a scheduled discard task at a specific threshold, when a component is aging and its failures are hidden and exert a “safety effect”. This is to ensure an adequate level of availability of hidden functions, and to reduce the risk of multiple failures to an acceptable level. However, in some...
Co-operative teams of service robots have been a research target for several years. Real-time task distribution and scheduling was identified to be one of the key challenges for these robot teams. This paper introduces the application of a team of service robots within hospital environments. Existing approaches for task distribution and scheduling, like central and distributed scheduling for the particular...
This paper presents a new algorithm for fusioning images of text-documents taken with different exposures.It is compared to several standard block oriented exposure- and focus-blending-algorithms.The recognition rate of a publicly available OCR-engine is used as a benchmark to quantify the results.Experiments show in average an improvement in the recognition rate from 0.46 to 0.64 by employing exposure...
In this paper, a new binarization algorithm for degraded document images is proposed. The method is based on positive and negative pixel energies using the Laplacian of an image. After a filtering step and morphological operations our local contrast segmentation method is able to detecting connected components. The given approach is applied to cases of sophisticated, challenging documents and other...
This paper describes a new versatile algorithm for correcting nonlinear distortions, such as curvature of book pages, in camera based document processing. We introduce the idea of using local orientation features to interpolate a vector field from which a warping mesh is derived. Ultimately, the image is corrected by approximating the nonlinear distortion with multiple linear projections. Since the...
We describe a threshold-based local algorithm for image binarization. The main idea is to compute a transition energy using pixel value differences taken from a neighborhood around the pixel of interest. By filtering the pixels with low positive and negative energy, we keep two subsets in the neighborhood, corresponding to higher positive and negative energy values. The binarization threshold is calculated...
In this paper we present for the first time experimental results on the control of phase velocity of a microwave signal propagating along an InAlAs/InGaAs/InP Schottky contact coplanar line (SCCPL). It is shown that the phase shift can be changed by an applied dc bias as well as by illumination. This device can therefore be used as a variable phase shifter with a layer structure equivalent to InP-based...
The authors present results on the optically controlled properties of a coplanar Schottky-contact transmission line. It is shown that a phase shift of the order of 90 to 180 degrees /cm is achieved by optically varying the width of the depletion layer, the device acting as a distributed Schottky photodiode.<<ETX>>
Experimental results on periodic coplanar Schottky-contact transmission lines on semiconducting GaAs, prepared by proton implantation, are presented. It is shown, that this technique reduces the propagation constant and increases the characteristic impedance, whereas the phase velocity further depends on the applied bias voltage. An additional significant result is the simultaneous increase in the...
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