Organisms with external fertilization are often sperm limited, and in echinoids, larger eggs have a higher probability of fertilization than smaller eggs. This difference is thought to be a result of the more frequent sperm-egg collisions experienced by larger targets. Here we report how two components of egg target size, the egg cell and jelly coat, contributed to fertilization success in a se...

Shoreline hardening is a method of coastal hazard protection that often implemented by government agencies and individual property owners. As awareness the potential negative effects shoreline has increased, natural nature-based approaches have gained in popularity. Most research related to focused on understanding environmental ecological effects. However, for hybrid, approaches, particular, t...

Complex life cycles have evolved independently numerous times in marine animals as well as in disparate algae. Such life histories typically involve a dispersive immature stage followed by settlement and metamorphosis to an adult stage on the sea floor. One commonality among animals exhibiting transitions of this type is that their larvae pass through a 'precompetent' period in which they do no...

hairball in a urethral diverticulum has rarely been reported. these hairballs are usually formed in the diverticulum coated with a hair bearing epithelium and can lead to urinary obstruction or infection. using laser is a safe way to ablate such stones.

Gabriel Taubin Brown University Holly Rushmeier, who’s served as associate editor in chief (AEIC) for special issues since 2007, has recently been appointed co-editor in chief of Eurographics’ Computer Graphics Forum, effective May 2010. Owing to her increased responsibilities and numerous other commitments, Holly has decided she’ll be unable to continue serving effectively in her current CG&A ...

Reuse of stone powder formed in the production manufactured sand is great significance to environmental protection and resource utilization. In this paper, waste calcareous rock line was added into concrete by 6%, 9%, 12% 15%, total weight controlled be constant prepare C30 C40 environment-friendly concrete. The influence on compressive strength transmission performance analyzed. It found that ...

Self-compacting concrete (SCC) is one of the most significant advances in concrete technology in the last two decades. SCC was developed to ensure adequate compaction through self-consolidation and facilitate placement of concrete in structures with congested reinforcement and in restricted areas. Marble Sludge Powder (MSP) can be used as filler and helps to reduce the total voids content in co...

Installation of granular columns is a cost-effective and versatile in situ technique to improve the shear strength, settlement, drainage behavior weak soils. It involves backfilling vertical boreholes ground with materials stiffer than native soil, such as stone or compacted sand. However, massive use overexploitation sand natural aggregates have depleted their reserves recent decades, causing ...