D ow noad The intractability of homogeneous a-satellite arrays has impeded understanding of human centromeres. Artificial centromeres are produced from higher-order repeats (HORs) present at centromere edges, although the exact sequences and chromatin conformations of centromere cores remain unknown. We use high-resolution chromatin immunoprecipitation (ChIP) of centromere components followed b...

For global monitoring, satellite remote sensing is a useful tool to cover wide area of earth surface for large scale observation. However, the correct interpretation of satellite images remains a challenging problem and the retrieval of earth related information from the processing and analysis of the satellite data requires the development of suitable artificial intelligence based technique. I...

Segmentation and classification of satellite imagery are a challenging problem due to the fact that it is not feasible to execute this task on a pixel-by-pixel basis.This paper proposes an efficient image classification technique for satellite images with the aid of KFCM and artificial neural network. The proposed classification technique is made of four phases namely, pre-processing, fragmenta...

How to cite this article: Botai CM, Combrinck L. Global geopotential models from Satellite Laser Ranging data with geophysical applications: A review. S Afr J Sci. 2012;108(3/4), Art. #662, 10 pages. http:// dx.doi.org/10.4102/sajs. v108i3/4.662 The launch of artificial satellites (as early as in 1957), specifically the launch of the first laser tracked satellite, Beacon-B, in 1964, has provide...

Tissue or Cell Cardiac Bioassists (Cardiac-Bio-Assists) are biological approaches to remedy to cardiac progressive insufficiency based on autologous tissue or cell transplantation. Some of the work-hypotheses are in pre-clinical evaluation (implants of embryonic myocardiocytes or Skeletal Muscle Ventricle, SMV), others are under preliminary (Dynamic Aortomyoplasty, and heart implants of myoblas...

Automatic satellite image registration for multi-sensor images is becoming increasingly important to aid in flood damage assessment. We consider two images, the one before flood (optical image) and the other during flood (SAR image) in the registration process. The objective is to maximize the similarity metric (of these two images) using information theoretic measures such as Mutual Informatio...

A wide range of software tools have been developed for visualising three-dimensional range data of topographic surfaces. Digital Elevation Models (DEMs), derived from photogrammetric measurements and from digitised contour maps are here used for illustration. To increase our understanding of the information content in DEMs in isolation or in combination with remotelysensed images and to facilit...

Floods represent the most devastating natural hazards in the world, affecting more people and causing more property damage than any other natural phenomena. One of the important problems associated with flood monitoring is flood extent extraction from satellite imagery, since it is impractical to acquire the flood area through field observations. This paper presents a method to flood extent ext...

We present a microelectrofusion method for construction of fluid-state lipid bilayer networks of high geometrical complexity up to fully connected networks with genus = 3 topology. Within networks, self-organizing branching nanotube architectures could be produced where intersections spontaneously arrange themselves into three-way junctions with an angle of 120 degrees between each nanotube. Fo...

Kinetochores assemble on distinct 'centrochromatin' containing the histone H3 variant CENP-A and interspersed nucleosomes dimethylated on H3K4 (H3K4me2). Little is known about how the chromatin environment at active centromeres governs centromeric structure and function. Here, we report that centrochromatin resembles K4-K36 domains found in the body of some actively transcribed housekeeping gen...