During the International GPS Service for Geodynamics (IGS) Epoch’92 campaign a special sub-campaign was organized to occupy all WEGENER/MEDLAS SLR sites with Trimble SST GPS receivers. This campaign, WEGENER/GPS-92, was initiated by the Institute for Applied Geodesy in cooperation with Delft University of Technology. The purpose was to observe the whole SLR network, for the first time, with GPS...

There are several types of approaches to specify the contents and boundaries of the IS field, some of which are normative and some descriptive. However, they do not consider the role of scientific language change in problem solving. Research is an ever-continuing “intellectual voyage”, in which both a research community and each individual researcher progress from one understanding to another d...

BACKGROUND Long-distance ocean voyages may have substantial impacts on seamen's health, possibly causing malnutrition and other illness. Measures can possibly be taken to prevent such problems from happening through preparing special diet and making special precautions prior or during the sailing if a detailed understanding can be gained about what specific health effects such voyages may have ...

We investigate non-Abelian gauge theories within a Wilsonian Renormalisation Group approach. Our main question is: How close can one get to a gauge invariant flow, despite the fact that a Wilsonian coarse-graining seems to be incompatible with gauge invariance? We discuss the possible options in the case of quantum fluctuations, and argue that for thermal fluctuations a fully gauge invariant im...

A new simple and low cost passive navigation system can be composed of a rate azimuth inertial platform with a gravity sensor on it, a digital gravity abnormal map and a log. The system achieves the carrier’s true position by matching the gravity sensor measurements with the existing gravity maps, so the gravity field’s characteristics effects on the positioning accuracy greatly. The simplified...

Like Gulliver and a host of other storybook characters , Lewis Carrol l ’s Alice becomes both befuddled and enlightened when she encounters worlds in which the normal scale of things has been altered. In addressing this year’s A N theme of “What Don ’ / We Know?”, I will attempt to convince you that each of us can profit from a similar type of fantastic voyage. I suspect that when the editors c...

The peak brightness of the solar spectrum is in the green when plotted in wavelength units. It peaks in the near-infrared when plotted in frequency units. Therefore the oft-quoted notion that evolution led to an optimized eye whose sensitivity peaks where there is most available sunlight is misleading and erroneous. The confusion arises when density distribution functions like the spectral radi...

Organizations are increasingly adopting bring-your-own-device (BYOD) policies. CIOs, however, remain concerned about the potential threats from personal devices and applications to the control and security of organizational IT assets. Based on in-depth case studies at Cisco, Wal-Mart and the Arkansas Department of Information Systems, the full article describes a four-wave model that describes ...

A new weather routing method is proposed that accounts for ship maneuvering motions, ocean currents, wind, and waves through a time domain computer simulation. The maneuvering motions are solved by differential equations of motion for every moment throughout the voyage. Moreover, the navigation route, expressed in terms of a Bézier curve, is optimized for minimum fuel consumption by the Powell ...

Spirituality and journeying have long informed one another, both in people’s life experiences and literary endeavours. Spiritualities within the Christian tradition and their relationship to travel have been most commonly explored with reference to the pilgrims of the middle ages and the missionary men and women of more recent centuries. The people by whom Christianity was introduced to Austral...