Estimation of demographic parameters is central to research questions in wildlife management, conservation, and evolutionary ecology. I review the 7 major classes of mark–recapture models that investigators can use to estimate apparent survival and other parameters from live-encounter data. Return rates are the product of 4 probabilities: true survival (S), site fidelity (F), site propensity (d...

We identified cases where the Jolly-Seber estimator of population size is biased under tag loss and tag-induced mortality by examining the mathematical arguments and performing computer simulations. We found that, except under certain tag-loss models and high sample sizes, the population size estimators (uncorrected for tag loss) are severely biased high when tag loss or tag-induced mortality o...

We are developing a new device which is aimed at supporting non-speaking individuals in literacy learning. The PhonicStick provides direct access to spoken phonics a set of phonemes used in the literacy learning program Jolly Phonics which can then be blended into words. In an initial study, children were able to generate novel words using the first level subset of six phonics. However, the ful...

BACKGROUND Natural killer (NK) cell lymphocytosis usually has an indolent course and can progress into massive lymphocytosis with development of cytopenias and neoplastic diseases. NK-cells usually express one or more "NK-associated" antigens (CD16, CD56, CD57). Reactive expansions are seen in autoimmune diseases, viral infections, solid tumours and non-Hodgkin's lymphoma. CASE PRESENTATION W...

We studied the nature of enucleated RBCs containing DNA remnants, Howell-Jolly (HJ) RBCs and reticulocytes (retics), that are characteristically present in the circulation of thalassemic patients, especially after splenectomy. Using flow cytometry methodology, we measured oxidative status parameters of these cells in patients with β-thalassemia. In each patient studied, these cells had higher c...

Segmentation of novel or dynamic objects in a scene, often referred to as background subtraction or foreground segmentation, is critical for robust high level computer vision applications such as object tracking, object classification and recognition. However, automatic realtime segmentation for robotics still poses challenges including global illumination changes, shadows, inter-reflections, c...