This paper discusses the validation of the future aeronautical communication system LDACS1 for navigation in order to implement an alternative positioning, navigation, and timing service. The included results originate from flight trials conducted in November 2012. Within the paper the setup of that measurement campaign is outlined. Results for synchronization of the ground stations, ranging an...

How are users exposed to Wikipedia results, in return to their web searches? Where are such results positioned on the screen? In this study, we experimentally measure the ranking of Wikipedia pages

Simulation results of indoor radio wave propagation at 60 GHz based on ray launching are presented and compared with measurement results. The results show that the statistical properties of the generated simulation sets are quite close to the statistical properties of the measurement sets. This indicates, that there are no mechanisms that cause a significant tendency to deviate in one direction...

Search engines are the most common gateway to search information in the WWW. Since Information Retrieval (IR) systems do not take Web accessibility issues into account, displayed results might not tailor to certain users’ needs such as people with disabilities or mobile devices’ users. In order to overcome this situation, we present a model aiming at considering Web accessibility as well as con...

OBJECTIVE To develop and validate a questionnaire to quantify disability associated with shoulder symptoms. METHODS A set of questions relevant to shoulder symptoms from a general disability interview was developed and the questionnaire applied to a cross-sectional population survey and a prospective study of general practice attenders. Subjects included adults who reported current shoulder p...

This paper describes progress in the design and testing of the log-ratio-based beamposition/intensity measurement module being built for the Low Energy Demonstration Accelerator (LEDA) and Accelerator Production of Tritium (APT) projects at Los Alamos National Laboratory. The VU-based module uses four, 2 MHz if inputs to perform two-axis position measurements and one intensity measurement. To c...

Corneal thickness measurements find applications in areas such as diagnosis and management of corneal disorders and corneal surgery. We present a technique for the measurement of corneal thickness using a CCD camera mounted on a slit-lamp biomicroscope and common image processing software. Thickness measurements were performed on three RGP contact lenses of known thickness with an average error...

BACKGROUND There are several methods to read skin prick test results in type-I allergy testing. A commonly used method is to characterize the wheal size by its 'average diameter'. A more accurate method is to scan the area of the wheal to calculate the actual size. In both methods, skin prick test (SPT) results can be corrected for histamine-sensitivity of the skin by dividing the results of th...

The First Annual AARST Radon Measurement Intercomparison Exercise was conducted at the radon calibration laboratory at Bowser-Momer, Inc. in November and December, 1997. There were thirty-two participants involved in the exercise, including Bowser-Momer. For grab radon measurements, the Environmental Measurements Laboratory (EML) sent samplers to be filled in the Bowser-Morner chamber simultane...

Background: Lung microangiopathy is a little known negative influence of diabetes mellitus on the functioning of the lungs. In current medical practice lung microangiopathy is diagnosed by comparing two measurements of lung diffusing capacity – once with the subject standing and once with the subject lying down. The necessity to take two measurements is inconvenient. Objectives: The aim of this...