Prismatic element

Diamond machined optical components have conquered a huge market. They are needed for projection systems, displays, laser scanners, sensors, reflective tapes, scientific instruments, medical and defense equipment, laser beam guiding, and illumination systems exhibiting a multitude of different surfaces ranging from rotational symmetric aspheres to freeform and structured surfaces with Fresnel or prismatic elements (Table 3). Moreover, aspheric glass and plastic... 

As an application, the flow in rough microchannels was applied theoretically in the nucleic acid extraction process [8], which is the first critical step for many nucleic acid probe assays. Using a microchannel with 3D prismatic elements on the channel wall can dramatically increase the surface area-to-volume ratio and hence enhance the nuclei acid adsorption on the wall. The opportunity for molecule adsorption is also increased due to the induced pressure resisting the central bulk electroosmotic flow. It is found that decreasing the electroosmotic flow velocity or the channel height enhances nuclei adsorption. 

Hu Y, Xuan X, Werner C, Li D (2007) Electroosmotic flow in microchannels with prismatic elements. Microfluid Nanofluid 3 151... 

Since polyethylene pipe (PE) is such a common plastic pipe, let s talk about dead loads and PE pipe. The overburden load applied to the pipe crown is usually considered to be equal to the weight of the soil column that projects above the pipe. A soil column of this type is often called a prismatic element and is involved in the use of a prism load. 

A concave lens cavity model with heater and cooling chaimels as shown in Fig.l were utilized for the simulation and experiment. The heater was put in the vicinity of the lens center, and the cooling chaimels were put around the cavity. Fig.2 is the cut view of the meshed cavity and coolant chaimel. The lens part is meshed by the hexahedral element, and the coolant chaimels are meshed via the combination of prismatic element in the axial direction and the tetrahedral element in the juncture region. The mold base is meshed by the tetrahedral element except in the region adjacent to the coolant surface, where only pyramid element can be used. 

Bromides and Iodides. The red-brown tribromide, UBr [13470-19-4], and the black tniodide, Ul [13775-18-3], may both be prepared by direct interaction of the elements, ie, uranium metal with X2 (X = Br, I). The tribromide has also been prepared by interaction of UH and HBr, producing H2 as a reaction product. The tribromide and tniodide complexes are both polymeric soflds with a local bicapped trigonal prismatic coordination geometry. The tribromide is soluble in H2O and decomposes in alcohols. 

Fig. 14. HTGR fuel elements (a) prismatic core HTGR fuel element (b) cross section of a spherical fuel element for the pebble bed HTGR. Reprinted from [88], 1977 Ameriean Nuelear Soeiety, La Grange Park, Illinois.

Infinite zigzag B chains with C strongly bonded to B eonstitute the basic building element of transition-metal carboborides (M -BC). The boron coordination is trigonal prismatic BM, whereas carbon coordination is a M -sBOh- However, with an increasing ratio of radii the B-chain elements are replaced by B pairs or... 

Fig. 1.3 Elements forming layered sulfides or selenides with the metal in octahedral or trigonal prismatic coordination (niobium and tantalum are found in both). (Adapted from [35])...

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