Written sources indicate that the farm of Reykholt in Borgarfjörður, Iceland was built on the land of the original settlement farm, and that it had acquired the primary status in the valley by the early 12th century. Archaeological evidence suggests that the farm together with a church may have been established as early as ca. 1000 AD, which is when Christianity was adopted in Iceland. The site...

We present a new, real-time method for rendering soft shadows from large light sources or lighting environments on dynamic height fields. The method first computes a horizon map for a set of azimuthal directions. To reduce sampling, we compute a multi-resolution pyramid on the height field. Coarser pyramid levels are indexed as the distance from caster to receiver increases. For every receiver ...

Existing estimators for edge length in 2D and surface area in 3D are applied to a binary representation of the object. In this paper we estimate length and area through volume measurements. Volume is measured without thresholding and does not introduce a sampling error. Edges are transformed into volumes by giving them a constant height after which they can be shifted perpendicular to the edge ...

Acoustic shocks have been previously documented in high-amplitude jet noise, including both the near and far fields of military jet aircraft. However, previous investigations into the nature and formation of shocks have historically concentrated on stationary, ground run-up measurements, and previous attempts to connect full-scale ground run-up and flyover measurements have omitted the effect o...

BACKGROUND Records in Western countries reveal that adult height has been increasing over the last 250 years. These height gains have been biologically associated with healthier childhoods, less illness, and longer life spans-a health-risk transition. To measure such progress in Thailand we studied height change over the last 3 decades. METHODS We analyzed height records for 33 000 21-year-ol...

Wave-height observations derived from single-site high-frequency (HF) radar backscattered Doppler spectra are generally recognized to be less accurate than overlapping radar techniques but can provide significantly larger sampling regions. The larger available wave-sampling region may have important implications for observing system design. Comparison of HF radar–derived wave heights with acous...

BACKGROUND AND OBJECTIVES In Andalusia there were no studies including a representative sample of children and adolescent population assessing growth and weight increase. Our objectives were to develop reference standards for weight, height and BMI for the Andalusian pediatric population, from 3 to 18 years of age for both genders, and to identify the final adult height in Andalusia. SUBJECTS...