Baryon production is studied within the framework of quantized fragmentation a QCD string. Baryons appear in model fairly intuitive way, with help causally connected string breakups. A simple helical approximation flux tube parameters constrained by mass spectrum light mesons sufficient to reproduce masses baryons.

Turbulent wake flows behind helical- and straight-bladed vertical axis wind turbines (VAWTs) in boundary layer turbulence are numerically studied using the large-eddy simulation (LES) method combined with actuator line model. Based on LES data, systematic statistical analyses performed to explore effects of blade geometry characteristics turbine wake. The time-averaged velocity fields show that...

Foundation module, the complex helical cuts are produced in a more efficient manner. Also, since Pro/E can easily construct variable pitch helixes (see Figure 1) the process of creating the helical paths was greatly simplified. The paths produced in this manner were parametric, meaning they could easily be changed without the need to reconstruct them as the design evolved. A 30% Snake supercond...

fouling is one of the main parameters in design of any exchanger. ignoring this parameter causes problems such as overheating or under- heating of process streams. in this article a heat exchanger network was designed using process streams data in cdu of tehran refinery. then using tema fouling factors, network exchangers were designed and area and cost were estimated. by changing fouling facto...

We introduce a new strategy for fabricating a seamless three-dimensional (3D) helical microreactor utilizing a silicone tube and a paraffin mold. With this method, various shapes and sizes of 3D helical microreactors were fabricated, and a complicated and laborious photolithographic process, or 3D printing, was eliminated. With dramatically enhanced portability at a significantly reduced fabric...

OBJECTIVE Our objective was to determine whether adjustments related to patient age are made in the scanning parameters that are determinants of radiation dose for helical CT of pediatric patients. SUBJECTS AND METHODS This prospective investigation included all body (chest and abdomen) helical CT examinations (n = 58) of neonates, infants, and children (n = 32) referred from outside institut...

Cell surface heparan sulfate proteoglycan (HSPG) interactions with type I collagen may be a ubiquitous cell adhesion mechanism. However, the HSPG binding sites on type I collagen are unknown. Previously we mapped heparin binding to the vicinity of the type I collagen N terminus by electron microscopy. The present study has identified type I collagen sequences used for heparin binding and endoth...

PURPOSE To compare the clinical effects of the single wide-diameter bicanalicular silicone tube and the double bicanalicular silicone tube in endonasal dacryocystorhinostomy (DCR) with canalicular trephinization for canalicular obstruction. METHODS We retrospectively reviewed the records of 121 patients with monocanalicular or common canalicular obstruction who had undergone endonasal DCR wit...

The stabilities of eight triple helical pyrimidine.purine.pyrimidine structures comprised of identical sequence but different RNA (R) or DNA (D) strand combinations were measured by quantitative affinity cleavage titration. The differences in equilibrium binding affinities reveal the importance of strand composition. For the sequences studied here, the stabilities of complexes containing a pyri...