BACKGROUND AND AIMS The genus Erica represents the epitome of plant biodiversity in the South African Cape region. It includes seeder and resprouter species, but both species diversity and narrow endemism are tightly associated with the seeder habit. It also includes 'mixed' species, in which both seeder and resprouter life histories are found. This intraspecific variation in life history is ge...

This paper describes a new approach for identifying first seeders in illegal file sharing investigations involving Foxy, one of the most popular Chinese peer-to-peer networks. In identifying first seeders, the approach focuses on determining the slow-rising period of the cumulative seeder curve instead of merely measuring the number of seeders. The relationships between file popularity, number ...

for planting fine seeds in cellular trays, an automatic pneumatic seeder was designed, constructed and evaluated. catia software was used to design and analysis the system parts of the seeder. different parts of the seeder, including vibrating seed hopper, vacuum boom, seed picking nozzles, seed tube, pneumatic system and electronic control unit for automation of the seeder, were designed and c...

According to the linear viscoelastic model, the population discrete elements under the vibration working condition of the seed tray of the seeder were assumed as rigid conditions to analyze the collision process. The dynamic characteristics among the population collision process for the vibration process of the seeder were analyzed by tracing the microcosmic motion of each seed. The following c...

We present a fault-classification scheme and a fault-seeding method that are based on the manifestation of faults in the program dependence graph (PDG). We enhance the domain/computation faultclassification scheme developed by Howden to further characterize faults as structural and statement-level, depending on the differences between the PDG for the original program and the PDG for the faulty ...

We present a fault-classification scheme and a fault-seeding method that are based on the manifestation of faults in the program dependence graph (PDG). We enhance the domain/computation faultclassification scheme developed by Howden to further characterize faults as structural and statement-level, depending on the differences between the PDG for the original program and the PDG for the faulty ...

During humoral immune responses some germinal centers (GCs) develop very well and give rise to a large number of high affinity antibody producing plasma cells. Other GC reactions develop poorly, somatic mutation is reduced, and the output production is practically absent. This led to the hypothesis that two classes of GCs exist, and that GCs show an all-or-none behaviour. We investigate the rol...

The flammability and combustibility of plant communities are determined by species features related to growth-form, structure and physiology. In some ecosystems, such as the Mediterranean ones, these characteristics may contribute to the existence of fire-prone species. Moreover, different post-fire regenerative strategies may present different degrees of recovery, depending on the particular f...

Campylobacter jejuni is the most common cause of bacterium-mediated diarrheal disease in humans worldwide. Poultry products are considered the most important source of C. jejuni infections in humans but to date no effective strategy exists to eradicate this zoonotic pathogen from poultry production. Here, the potential use of passive immunization to reduce Campylobacter colonization in broiler ...

Magnetic-type seeder is a precision metering device, particularly suitable for small seeds. A visual inspection system for precision performance of magnetic-type seeder was established based on machine vision and image processing technology. By using pre-treatment techniques including image binarization and image filtering, image quality was enhanced effectively. As the gray-scale value of the ...