Materials Literature
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The history of engineering knowledge with regards to bamboo is surprisingly recent, with the major work on bamboo having been completed by Janssen (1981) and Acre (1993) of the University of Eindhoven, The Netherlands. In their research, both noted that splitting is the dominant limit state in structural applications,…
Two dimensional materials are important for electronics applications. A natural way for electronic structure engineering on two dimensional systems is on-plane chemical functionalization. Based on density functional theory, we study the electronic structures of fluorine substituted planar polysilane and graphane. We f…
This paper provides practical engineers with an equation to calculate the secondary moments of prestressed concrete continuous beams. Normally the prestressed secondary moments are calculated by deriving it from the net moment and the primary moments. This involves extensive calculations and sometimes complex integrat…
In the mol-ecule of the title compound, C(15)H(14)N(4), the triazole ring is oriented at dihedral angles of 30.8 (2) and 67.4 (2)° with respect to the pyridine and benzene rings, respectively. The crystal structure is stabilized by C-H⋯N hydrogen-bonding inter-actions, forming chains of mol-ecules along [01].
The title complex, [Ag(2)(C(10)H(8)N(2))(2)(C(32)H(30)N(2)P(2))](ClO(4))(2)·2CH(3)COCH(3), is a centrosymmetric dimer with pairs of Ag(I) atoms bridged by N,N'-bis-(diphenyl-phosphinometh-yl)ben-zene-1,4-diamine ligands. In addition, each Ag(I) atom is coordin-ated by one chelating 2,2'-bipyridine ligand, giving a dis…
The solid solution in the system Zr-Mo-W-O with composition ZrW(1.75)Mo(0.25)O(8) (zirconium tungsten molybdenum octa-oxide) was prepared by solid-state reactions as a polycrystalline material. Its structure has cubic symmetry (space group P2(1)3) at room temperature. The structure contains a network of corner-sharing…
Abstract The epoxidation of 1,4‐bis(allyloxy)butane to give 1‐allyloxy‐4‐glycidoloxybutane and 1,4‐bis(glycidoloxy)butane was investigated. The reaction was carried out with 30 wt % hydrogen peroxide under phase transfer catalysis (PTC) conditions in the presence of sodium tungstate(VI) dihydrate and orthophosphoric(V…
We study the local classical and quantum critical properties of electron-vibration interaction, represented by the Yu-Anderson model. It exhibits an instability, similar to the Wentzel-Bardeen singularity, whose nature resembles to weakly first-order quantum-phase transitions at low temperatures, and crosses over to G…
The low-energy properties of the S = 1/2 antiferromagnetic XY model with quasiperiodic modulation are investigated for the consideration of spin–phonon coupling. It is found that the lattice distortion at every site displays a self-similar character, which is induced by quasiperiodic modulation. As quasiperiodic modul…
We consider classical and quantum propagators for two different time intervals. If these propagators follow one another in a Fibonacci sequence we get a discrete quasi-periodic system. A theorem due to Nielsen provides a novel conserved quantity for this system. The Nielsen quantity controls the transition between com…
Post-weld treatment by various peening methods (i.e. needle or hammer peening, ultrasonic impact treatment) has received recent attention as a promising means for extending the fatigue lives of existing steel bridges or for enhancing the fatigue performance of new welded civil infrastructure. Peening treatments work p…
This paper provides an overview of assessment of building hazard in petroleum and chemical facilities. A brief overview of explosion hazards is also provided. Then, the paper focuses on two specific aspects, that of Detailed Building Structural Analysis and Building Upgrade Conceptual Structural Design.
The title compound, potassium nickel(II) digallium tris-(phosphate) dihydrate, K[NiGa(2)(PO(4))(3)(H(2)O)(2)], was synthesized hydro-thermally. The structure is constructed from distorted trans-NiO(4)(H(2)O)(2) octa-hedra linked through vertices and edges to GaO(5) trigonal bipyramids and PO(4) tetra-hedra, forming a…
Covered conductors and compact configuration with triangle spacers for 10-kV distribution lines have brought many advantages and benefits in China. In the past, the polymeric spacers cast with polycarbonate material had been designed and applied to make the distribution line compact. The reason that breakage faults oc…
The Mn(II) atom in the two independent ion-pairs of the title salt, [Mn(C(2)F(3)O(2))(C(18)H(12)N(6))(H(2)O)(2)]C(2)F(3)O(2), is N,N',N''-chelated by the neutral N-heterocycle and O,O'-chelated by the carboxyl-ate ion, the five atoms involved in chelation comprising a penta-gon around it. The apical sites of the trans…
The nanoparticles developed are based on chitosan, a biocompatible and biodegradable polysaccharide. The chitosan nanoparticles are formed in an entirely water-based process by electrostatic interactions with other biocompatible molecules. As a prerequisite to understand the fate of such nanoparticles in cells, compre…
In the three years since Unified Facilities Criteria (UFC) 4-023-03 Design of Buildings to Resist Progressive Collapse was first published in January of 2005, various omissions, ambiguities, and opportunities for improvement were identified by civilian and government designers and engineers. A significant revision to…
The hot-dip galvanizing process takes place in a molten bath of zinc metal at a temperature of 840 ± 20°F. The coating process takes only a short time at this temperature, usually less than 5 minutes, so this limits the potential changes to the mechanical properties of the steel that is being galvanized. This study ex…
We analyze two numerical schemes of Euler type in time and C0 finite-element type with -approximation in space for solving a phase-field model of a binary alloy with thermal properties. This model is written as a highly non-linear parabolic system with three unknowns: phase-field, solute concentration and temperature,…
In this study, iron oxide was added with different concentrations (0.5, 1, 2.5 and 5 wt%) of hydroxyapatite (HAP) obtained by the mechanical milling method. The mixture was calcinated at 900 °C for 5 h with a heating rate of 3 °C min−1. The influence of the incorporation of different amounts of iron oxide was investig…