The C. elegans neuroectodermal seam cells provide a tractable and well-established model for studying the stem cell mode of division, due to the reiterative asymmetric divisions occurring during larval development. They are, however, not generally considered to be 'true' stem cells, owing to their eventual terminal differentiation and the lack of a defined stem cell niche-a microenvironment tha...

This study, in a broad sense, fills in the missing parts in previous efforts at pullback stripping mode design with a dipping coal seam. Three different spoiling procedures have been developed: the normal mode, where the coal seam is flat/nearly flat; the uphill mode, where the coal seam is dipping and the dragline spoils uphill; and the downhill mode, where the coal seam is again dipping but t...

Web applications that require higher levels of security have various security options that can be deployed on the server. However providing security on the client consuming the service remains a challenge especially when the application runs in a web browser. While various types of security hardware can work with the user's computer, there is no convenient way for web applications to access suc...

The accuracy requirements of laser welding put high demands on the manipulator that is used. To use industrial six-axis robots for manipulating the laser welding optics, sensors measuring the seam trajectory close to the focal spot are required to meet the accuracy demands. When the measurements are taken while the robot is moving, it is essential that they are synchronized with the robot motio...

This paper presents the architecture of a virtual machine designed specifically for the execution of multiple languages, which we call Seam. The architecture consists of a number of generic components, usable by all languages, and of a number of interfaces for which implementations have to be provided by language implementors. Our contribution is the identification of the generic services and t...

Depositions of all kinds of urban dirt and dust including anthropogenic organic substances like soot change the filter properties of the seam filling material of pervious pavements and lead to the formation of a new soil substrate called seam material. In this study, the impact of the particular urban form of organic matter (OM) on the seam materials CECpot, the specific surface area (As), the ...

Microtubules are constructed from alpha- and beta-tubulin heterodimers that are arranged into protofilaments. Most commonly there are 13 or 14 protofilaments. A series of structural investigations using both electron microscopy and x-ray diffraction have indicated that there are two potential lattices (A and B) in which the tubulin subunits can be arranged. Electron microscopy has shown that ki...

Two central processes in the development of metazoans are the production of multiple cell types and the morphogenesis of complex multicellular structures. Morphogenesis requires that reproducible homotypic and heterotypic cellular contacts and interactions be established following precise cell recognition events. In such morphogenetic interactions, cells of a single overt cell type may not all ...

Coal wall rib-spalling is regarded as a key technical problem influencing safe and efficient mining of fully mechanized working face with great height (FGH) while the coal stability influenced by strength body, which internal joint fissures have crucial impact on body. This research attempted to explore how FGH occurrence fissures. paper uses physical numerical simulations systematically analyz...

Crossing borehole is an effective means to eliminate the outburst risk of coal and gas. The influence inclination angle, diameter, drainage time on radius gas are studied by numerical simulation engineering example verification. study shows that changes in a “U” shape with increase angle. When angle α seam plane decreases, increases. Furthermore, mass around broken shear deformation, which cons...