Number of threads

The development of finite element methods, since the late 1960s, has made possible the exploration of a wide range of variables relevant to the design of screwed plug closures. Work (126,128—132) on the stress at the toot of the first loaded thread, where most failures occur, and the load distribution along the thread length has led to the conclusions that the load carried by the first three threads decreases considerably as the number of active threads increases to 20, and the load carried by the second thread, is approximately 75% of the load on the first thread, f, and that on the third thread, fj, about 60% of f, that on the first thread, regardless of the number of threads. 

Mercaptans Compounds containing sulfur which have an extremely offensive skunk-like odor. Also sometimes described as smelling like garlic or onions. Mesh count The number of threads in a linear inch of fabric/wire cloth. 

One revolution of the worm advances the gear teeth in direct proportion to the number of the worm threads. The most commonly used worms have either one, two, three, or four separate threads and are referred to as single-, double-, triple-, and quadruple- thread worms. The number of threads is determined by counting the number of starts or entrances at the end of the worm. 

Polyrotaxane Molecular weightb Number of ethylene glycol units (included + non-included) Number of threaded a-CDb Molar ratio of ethylene glycol units to a-CD... 

The count of a rubber thread is the number of threads which measure exactly one inch across when placed side by side. See Cloth Count and Yam Count. 

A. Geberg supplemented his investigations by determining the basic geometries of screws in practical applications with varied parameters number of threads and channel depth and their dependent variables, tip angle (Fig. 2.4), and free cross-sectional area that can be filled with product (Fig. 2.5). 

The feed capacity depends on the free screw volume (channel depth, number of threads), the pitch, the screw speed, and the bulk density of the product. The product can only be conveyed if there is friction between the product and the cylinder wall. 

Self-wiping screw elements with the maximum possible number of threads give the largest free cross-section (see Fig. 2.5, Chapter 2). Thus, triple-flighted elements should be used in the intake zone of twin screw extruders with Dc/Dj < 1.3, and double-flighted elements in the case of D0/D, > 1.3. An intake zone length of 4 to 6 D is generally adequate for effective product feed. 

Table 5.2 Centerline distance limits for different numbers of threads for fully wiped geometries...

Figure 5.10 shows the tip angle for fully wiped geometries according to the ratio of centerline distance to diameter. We can also see the limits of infinitesimally small tip angles for numbers of threads greater than one. 

Technical requirements may sometimes mean switching between elements with different numbers of threads along an extruder. This always requires transfer elements, spacers in the simplest case, otherwise a slight axial movement of the screw shafts towards one another will cause them to collide. Figure 5.11 shows this for the transition between triple- and single-flighted screw elements. 

Figure 5.14 Free surface related to the square of the diameter for different numbers of threads (fully wiped geometry)...

Figure 8.3 Grid in the cross-section of conveying elements with different numbers of threads...

Sewing thread lubricants based on silicone have been tried and proven in final finishing of sewing thread to Improve the sliding properties and to Improve their resistance to heat. The sewability is improved, the number of thread breaks reduced and the lustre of the sewing improved. 

Diameter Nominal thick- ness, inches Circumference Transverse areas Length of pipe per square foot of Length of pipe containing 1 cu. ft., feet Nominal 1 Number of threads per inch of screw... 

These findings suggest that the mechanically threaded structure of polyrotaxanes with controlled number of threading a-CD molecules can have favorable thermodynamic effects on multivalent interactions. Finally, we have established the concept that the combination of multiple copies of ligands and their supramolecular mobility along the mechanically threaded polyrotaxane structure should contribute to the novel design of polymeric architectures aiming at enhanced multivalent interactions. 

In our design of polyrotaxanes here, the respective numbers of threaded a-CDs and DMAEC groups per polyrotaxane were estimated to be around 23 and 40 for DMAEC-SS-PRx, 30 and 40 for DMAEC-PRx from their H-NMR spectra. The complexation of DMAEC-(SS)-PRXs with pDNA was compared with that of a linear PEI with a Mn of 22,000 (LPEI22k) in terms of gel electrophoresis. A band for free pDNA in the electrophoresis was disappeared upon complexation with a smaller quantity of amino groups in the polyplex with the polyrotaxane than with the LPEI. 

This partitioning enables the following (CUDA runtime mediated) physical mapping onto the GPU hardware each block is run on an individual MP with the number of threads determined by the number of physical SPs within the MP. As a result, only threads within the same block can synchronize with each other. This block-based parallelism and the need to keep all SM units busy in order to achieve efficient performance lead to a number of nontrivial programming considerations. 

With further increase of Arb, even thread-like micelles further from the wall are broken up and the small number of thread-like micelles in the center cannot reach the wall in sufficient number to maintain high DR. The wall-shear stress corresponding to this critical... 

Figure 5.8 Cross-sectional TEM images of GaN films on (a) nonporous SiC substrate, and (b)-(d) on porous SiC substrates. The label ps denotes a porous substrate and np denotes a nonporous substrate. The surface pore density of the substrate in (b) is 13 prrr2, and in (c) and (d) is 11.5 pm-2. The open tubes in the GaN films on porous substrates are marked by T (the tubes appear white in contrast near the top of the film where they are empty, and black near the interface where they are filled by Ga). The regions labeled D contain a relatively low number of threading dislocations originating at the interface (due to the lateral epitaxial growth over the substrate pores), and they contain dislocation half-loops gliding in from tubes. One half-loop is faintly seen to the right of a in (c). Reproduced from A. Sagar et al., J. Vac. Sci. Technol. B 21, 1812. Copyright (2003), with permission from the American Institute of Physics...

Caps and bottles must have the same thread pitch or tpi (threads per inch). The number of threads per inch reduces as the neck diameter increases i.e. 

A TciT simple mode of filtering aqueous fiuids, which are not injured by exposure to the air, is to draw them off from one vessel to another, by means of a number of threads of loosely twisted cotton or worsted arranged in the form of a syphon. The little cotton rope at once performs the operations of de cantation and filtration. This method is often convenient for sucking off the water from small quantities of precipitates. 

Fig. 20 are the number of threads of 6-cord flax required to hold a bow of the drawing weight indicated. Stepping on the centei of the bow while the ends are supported on wood blocks will bend the bow enough to permit slipping the string in place. 

Alchemists admit to there being many degrees to their fire, depending on whether The Work is more or less advanced. They do this by regulating the number of threads composing the wicks ... 

Casings and heavy-duty terminal boxes are often made of cast iron or fabricated from thick steel plates. Occasionally cast bronze may be used, in services offshore where sea water corrosion may be a problem. In these cases the entry is usually threaded. The gland is screwed into the threaded hole. A washer may be required between the outer surface of the box and the gland, to satisfy the requirements for ingress of liquids and particles, and for the hazardous area. When Ex (d) glands are used with Ex (d) boxes it is necessary to ensure that the prescribed number of threads on the gland enter the hole. 

Returns the number of the current thread, int num threads Sets the number of threads to use. 

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