Multi-stage high power amplifiers require more accurate behavioural models to provide a better description of memory effects and highly nonlinear characteristics than memoryless models based on single-tone transfer characteristics. This is achieved using measured two-tone transfer characteristics of the amplitude and phase of the fundamental, IM3 and IM5 componenls, which has highly nonlinear c...

RHOADES, C.C., and BINKLEY, D. 1992. Spatial extent of impact of red alder on soil chemistry of adjacent conifer stands. Can. J. For. Res. 22: 1434-1437. We examined patterns in soil N availability and pH along transects extending from mixed stands of conifers (mostly Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)) and red alder (A/nus rubra Bong.) to pure conifer stands at two locations. A...

We compared two adjacent mature forest ecosystem types (spruce vs. beech) to unravel the fate of assimilated carbon (C) and the cycling of organic and inorganic nitrogen (N) without the risk of the confounding influences of climatic and site differences when comparing different sites. The stock of C in biomass was higher (258 t·ha−1) in the older (150 years) beech stand compared to the younger ...

Reusing the data collected during an epidemiological study is a complex task. This is mainly due to the frequent utilization of traditional storage supports, as well as specific formats and/or terminologies which can make it difficult to integrate the gathered data with data from other information resources. Using terms from the UMLS Metathesaurus, we have annotated the data collected during th...

Forest stand boundaries are usually represented on vegetation maps as fine lines all having the same width. Thus spatial accuracy and precision are considered to be uniform over an entire map. However, real forest boundaries — i.e., those that can be observed on the ground— differ in degree of definition and contrast between adjacent stands. This study examines the association between ecologica...

BACKGROUND Anterior lumbar interbody fusion (ALIF) followed by pedicle screw fixation (PSF) is used to restore the height of the intervertebral disc and provide stability. Recently, stand-alone interbody cage with anterior fixation has been introduced, which eliminates the need for posterior surgery. We compared the biomechanics of the stand-alone interbody cage to that of the interbody cage wi...

Introduction: As dedicated endoscopy suites for skull base surgery are becoming more prevalent, it is important to consider the optimal operative room setup. Multiple techniques have been presented for surgeon positioning for two-team endoscopic skull base surgery. Classically, the neurosurgeon and otolaryngologist stand adjacent to each other on the same side of the patient bed while operating...

Throughout the Applegate watershed, dense, overstocked, immature stands of mixed conifers and hardwoods and declining stands of mature conifers present significant and complex silvicultural problems. Stand stagnation is common, as is loss of largediameter conifers from insects and wildfire. Treatments designed to maintain or encourage development of large-diameter conifers have not been tested....