281   Stress-strain curves for stainless steel at elevated temperatures Stress-strain curves for stainless steel at elevated temperatures    2006 This paper presents the mechanical properties data of stainless steel at elevated temperatures. Accurate prediction of the material properties of stainless steel at elevated temperatures is necessary for determining the load-carrying capacity of structures under fire conditions. However, full utilization of the special feature of stainless steel has not been possible due to lack of technique data on the fire resistance of stainless steel structural material. Therefore, both steady and transient ... 查看全文

282   Vector Iteration in Pointed Iterative Theories Vector Iteration in Pointed Iterative Theories Stephen L. Bloom;Calvin C. Elgot;Jesse B. Wright    0 This paper is a sequel to a previous paper (S. L. Bloom, C. C. Elgot and J. B. Wright, Solutions of the iteration equation and extensions of the scalar iteration operations, SIAM J. Comput., 9 (1980), pp. 25–45. In that paper it was proved that for each morphism $ \bot :1 \to 0$ in an iterative theory $J$ there is exactly one extension of the scalar iteration operation in $J$ to all scalar morphisms such that $I_1^\dag = \bot $ and all scalar iterative identities remain valid. In this paper t 查看全文

283   Finite element evaluation of the strength behaviour of high-strength steel column web in transverse compression Finite element evaluation of the strength behaviour of high-strength steel column web in transverse compression    2010 In current European Standard EN 1993, the moment-rotation characteristics of beam-to-column joints made from steel with a yield stress > 460MPa are obtained from elastic design procedures. The strength of the joint basic components, such as the column web subject to local transverse compression, is thus limited to the yield resistance rather than the plastic resistance. With the recent developments of higher strength steel grades, the need for these restrictions should be revisited. However, ... 查看全文

284   Investigation on mechanical behaviors for bolted connections in carbon steel and in stainless steel using FEM Investigation on mechanical behaviors for bolted connections in carbon steel and in stainless steel using FEM    2008 A finite element (FE) analysis with three-dimensional solid elements has been performed for estimating the structural behaviors of single shear bolted connections fabricated with cold-formed austenitic stainless steel by utilizing the existing test data for calibration. Failure and curling (out-of-plane deformation perpendicular to the direction of loading) criteria were proposed. Therefore, the failure mode and ultimate strength, predicted by FE analysis method, showed good agreements with thos... 查看全文

285   PREDICTIONS OF GAIN IN PULP YIELD AND TEAR STRENGTH IN YOUNG LOBLOLLY PINE THROUGH GENETIC INCREASES IN WOOD DENSITY. PREDICTIONS OF GAIN IN PULP YIELD AND TEAR STRENGTH IN YOUNG LOBLOLLY PINE THROUGH GENETIC INCREASES IN WOOD DENSITY.    1975 Samples from 100 ten-year-old loblolly pine trees were pulped under constant conditions to yield bleachable kraft pulp with an average Kappa No. of 35. Yield and physical properties of the pulp were measured. Wood density was determined from separate samples from the same trees. Wood density was strongly related to pulp yield and to tear strength. Predictions of gain to be expected from breeding for increased wood density were 10 - 15% and 10% of the mean for pulp yield and tear strength, respec... 查看全文

286   Selective signaling of fluoride anion based on imidazole moieties Selective signaling of fluoride anion based on imidazole moieties C. A. O'Rourke, M. Attrill and P. J. Holloway    2011 The imidazole ring unit in both 2-(2′-hydroxyphenyl)-benzimidazole (ligand a) and a europium(III) complex exhibited specific luminescent responses in the presence of fluoride anions. UV-visible and 1H-nuclear magnetic resonance spectra showed that the NH bond of the imidazole ring can form. a hydrogen bond with added fluoride anions. The detection limits are 5 × 10−6 m for organic ligand and 1.0 × 10−6 m for the europium com... 查看全文

287   Proposal of failure criterion applicable to finite element analysis results for wall-thinned pipes under bending load Proposal of failure criterion applicable to finite element analysis results for wall-thinned pipes under bending load    2012 In this work, a failure criterion applicable to large strain Finite Element Analysis (FEA) results was proposed in order to predict both the fracture mode (collapse or cracking) and the limit bending load of wall-thinned straight pipes. This work was motivated from the recent experimental results of Tsuji and Meshii (2011); that is, fracture mode is not always collapse, and the fracture mode affects the limit bending load. The key finding in comparing their test results and a detailed large stra... 查看全文

288   Topological complexity of crystal structures: quantitative approach Topological complexity of crystal structures: quantitative approach P. Coppens    0 The topological complexity of a crystal structure can be quantitatively evaluated using complexity measures of its quotient graph, which is defined as a projection of a periodic network of atoms and bonds onto a finite graph. The Shannon information-based measures of complexity such as topological information content, IG, and information content of the vertex-degree distribution of a quotient graph, Ivd, are shown to be efficient for comparison of the topological complexity of polymorphs and che... 查看全文

289   Two-Color Fourier Analysis of Iterative Algorithms for Elliptic Problems with Red/Black Ordering Two-Color Fourier Analysis of Iterative Algorithms for Elliptic Problems with Red/Black Ordering C.-C. Jay Kuo;Tony F. Chan    0 The red/black ordering scheme is often used to increase the parallelism of iterative methods for solving elliptic partial differential equations (PDEs). However, the convergence rates are also affected, often adversely. This paper provides a unified approach, called the two-color Fourier analysis, to study the convergence rates of iterative algorithms for elliptic problems with the red/black ordering. This Fourier tool is used to analyze different types of iterative algorithms, including the suc... 查看全文

290   Cost appraisal of a fluoride tablet programme to Manchester primary schoolchildren Cost appraisal of a fluoride tablet programme to Manchester primary schoolchildren C. A. O'Rourke, M. Attrill and P. J. Holloway    2006 Abstract The Manchester fluoride tablet trial was a pragmatic study to assist the Health Authority to decide whether to provide fluoride tablets daily to all primary schoolchildren in the District prior to water fluoridation being introduced. Twenty-two primary schools took part, half being allocated at random to the public health programme while the other half remained untreated. The average age at baseline was 5 yr 3 months. Costs were monitored throughout the trial and tangible and intangible... 查看全文

291   Shear buckling strength and design of curved corrugated steel webs for bridges Shear buckling strength and design of curved corrugated steel webs for bridges    2009 This paper presents the shear buckling strength and design of curved corrugated steel webs for bridges considering material inelasticity. The inelastic buckling strength is determined from buckling curves based on the proposed shear buckling parameter, which is a function of the elastic shear buckling strength of steel web and the material shear yielding strength. A finite element analysis is carried out to study the geometric parameters affecting the shear buckling strength of curved corrugated... 查看全文

292   Comparison of butt tensile strength data with interface corner stress intensity factor prediction Comparison of butt tensile strength data with interface corner stress intensity factor prediction    1993 The butt tensile strength of a joint that bonds two stainless steel rods together with an unfilled epoxy adhesive (Epon 828/T-403) has been determined for a wide range of bond thicknesses. The measured joint strength shows a pronounced bond thickness dependence; joint strength increases by a factor of 2 as bond thickness is reduced from 2.0 to 0.25 mm. A failure criterion, based upon a critical interface corner stress intensity factor, accurately predicts the observed bond thickness effect. This... 查看全文

293   Ladderlike Ferromagnetic Spin Coupling Network on a π-Conjugated Pendant Polyradical Ladderlike Ferromagnetic Spin Coupling Network on a π-Conjugated Pendant Polyradical Takashi Kaneko,*† Takahisa Makino,† Hiroshi Miyaji,† Masahiro Teraguchi,† Toshiki Aoki,† Makoto Miya    2003 A poly(9,10-anthryleneethynylene)-based polyradical with two pendant stable phenoxyls in one anthracene skeleton was newly synthesized via polymerization of the corresponding bromoethynylanthracene monomer using a Pd(0) catalyst. The average molecular weight of the polymer reached M̄n = 5 × 103 and was soluble in common organic solvents. The polyradical was prepared from the corresponding hydroxyl precursor polymer and was appropriately stable at room temperature. The ESR spectrum of the c... 查看全文

294   Prediction of the flexural strengths of welded H-sections with local buckling Prediction of the flexural strengths of welded H-sections with local buckling    2012 This paper describes the flexural strength of welded sections based on a series of flexural tests performed on H-sections fabricated from steel plates of thickness 6.0 mm with nominal yield stress of 315.0 MPa. Thin-walled flexural members undergo local, lateral-torsional or their interactive buckling according to the section geometries and lateral boundary conditions. Flexural members with the flanges or the web of large width-to-thickness ratios may undergo local buckling before lateral-torsio... 查看全文

295   ULTIMATE STRENGTH OF BEAMS REINFORCED WITH STEEL HAVING NO DEFINITE YIELD POINT. ULTIMATE STRENGTH OF BEAMS REINFORCED WITH STEEL HAVING NO DEFINITE YIELD POINT.    1974 Experimental evidence is presented on the conservative nature of the provisions of the Building Code (ACl 318-71) in predicting the ultimate strengths of beams reinforced with steel with no well defined yield point. Tests to failure were conducted on a total of 16 beams of various percentages of reinforcement. Eight of the beams were reinforced with high strength steel with a sharply defined yield point, and the others were reinforced with steel with no definite yield. A general theoretical meth... 查看全文

296   Predicting yield-stress anomalies in L12 alloys: Ni 3Ge-Fe3Ge pseudo-binaries Predicting yield-stress anomalies in L12 alloys: Ni 3Ge-Fe3Ge pseudo-binaries    2005 The L12-based pseudo-binary (Ni1 - cFe c)3Ge is an ideal system to study yield-strength anomaly and its origin as it has a solid-solution phase vs. c and Ni3Ge exhibits an anomaly while Fe3Ge does not. Using two ab initio electronic-structure techniques, we calculate the planar-fault energies on the γ-surface, i.e., antiphase boundaries (APB) and stacking faults, both complex and superlattice intrinsic (SISF), for (Ni1 - cFe c)3Ge as a function of c. Generally, we use the fault energies co... 查看全文

297   cis-2,4,9-Trimethylthioxanthene 10-oxide cis-2,4,9-Trimethylthioxanthene 10-oxide H. Chen, D. Han, H. Yan, W. Tang, Y. Yang and W. Yang    0 查看全文

298   Ultrahigh yield stress in a general electrorheological fluid under compression Ultrahigh yield stress in a general electrorheological fluid under compression    2010 The yield stress induced by external electric field generally of the order of kVmm- 1 is an important parameter for an electrorheological (ER) fluid. An ultrahigh yield stress of over 100kPa of a general ER fluid in a slow compressive flow under an electric field of less than 0.6 kVmm- 1 has been achieved in this study, while its shear yield stress tested on a shear rheometer is only 0.6kPa. A lower compressive velocity results in a higher yield stress under the same electric field. The large di... 查看全文

299   Model for prediction of crack resistance of low strength steels within a wide temperature range Model for prediction of crack resistance of low strength steels within a wide temperature range    1991 Physical dependences which connect crack resistance KIc with effective and inner components of the yield point, deforming stress and Brinell hardness of steel (HB) are obtained proceeding from the notion of thermoactivated plastic strain. Verification of the model on the base of vast experimental data of other researches has permitted to suggest a concept of the normalized crack resistance as a constant of the material. A practical procedure for prediction of crack resistance within a wide tempe... 查看全文

300   Bis(1,10-phenanthroline)copper(II)-μ-cyano-cyano(1,10-phenanthroline)copper(I) thiocyanate dihydrate Bis(1,10-phenanthroline)copper(II)-μ-cyano-cyano(1,10-phenanthroline)copper(I) thiocyanate dihydrate H. Chen, D. Han, H. Yan, W. Tang, Y. Yang and W. Yang    0 查看全文

301   Adaptive Linear Equation Solvers in Codes for Large Stiff Systems of ODEs Adaptive Linear Equation Solvers in Codes for Large Stiff Systems of ODEs K. R. Jackson;W. L. Seward    0 Iterative linear equation solvers have been shown to be effective in codes for large systems of stiff initial-value problems for ordinary differential equations (ODEs). While preconditioned iterative methods are required in general for efficiency and robustness, unpreconditioned methods may be cheaper over some ranges of the interval of integration. In this paper, a strategy is developed for switching between unpreconditioned and preconditioned iterative methods depending on the amount of work b 查看全文

302   Tetra-n-butylammonium hydrogen dichloromaleate Tetra-n-butylammonium hydrogen dichloromaleate H. Chen, D. Han, H. Yan, W. Tang, Y. Yang and W. Yang    0 查看全文

303   Aqua[bis(salicylidene)ethylenediaminato](isobutyl)cobalt(III) Aqua[bis(salicylidene)ethylenediaminato](isobutyl)cobalt(III) H. Chen, D. Han, H. Yan, W. Tang, Y. Yang and W. Yang    0 查看全文

304   The iterative time reversal process: Analysis of the convergence The iterative time reversal process: Analysis of the convergence Claire Prada;Jean‐Louis Thomas;Mathias Fink    0 The efficiency of a time reversal acoustic mirror to focus on a reflective target through an inhomogeneous media has been demonstrated. In a multitarget media, the ability of such a mirror to work in an iterative mode in order to focus selectively on the strongest target was shown [C. Prada, F. Wu, and M. Fink, J. Acoust. Soc. Am. 90, 1119 (1991)]. The theory of how the iterative time reversal process is built is based on a matrix formalism and treats the array of L transducers in a given medium 查看全文

305   Shear strength prediction by modified plasticity theory for short beams Shear strength prediction by modified plasticity theory for short beams    2003 Two previous series of short beam tests, comprising high-strength concrete and varying degrees of vertical shear reinforcement, were reinvestigated by considering the failure mechanism approach in limit analysis and concrete plasticity. Both original plastic solutions and crack sliding solutions were applied to predict the shear resistance. The latter solutions have been recently introduced and modified because the yield line can develop along the critical diagonal crack. This results in a yield... 查看全文

306   A two-moment cloud microphysics parameterization for mixed-phase clouds. Part 2: Maritime vs. continental deep convective storms A two-moment cloud microphysics parameterization for mixed-phase clouds. Part 2: Maritime vs. continental deep convective storms A. Seifert;K. D. Beheng    2006 A systematic modeling study investigates the effects of cloud condensation nuclei (CCNs) on the evolution of mixed-phase deep convective storms. Following previous studies the environmental conditions like buoyancy and vertical wind shear are varied to simulate different storm types like ordinary single cells, multicells and supercells. In addition, the CCN characteristics are changed from maritime to continental conditions. The results reveal very different effects of co... 查看全文

307   Effectiveness of a chlorhexidine dentifrice in orthodontic patients: a randomized-controlled trial Effectiveness of a chlorhexidine dentifrice in orthodontic patients: a randomized-controlled trial Prof. Dr. Helge Willner and Prof. Dr. Friedhelm Aubke    2006 This blind and randomized-controlled trial analysed chlorhexidine dentifrices in relation to dental plaque, gingivitis, bleeding, calculus and enamel extrinsic staining development. Volunteers in fixed orthodontic therapy used the following dentifrices: 1100 ppmF, NaF (group A, n=27); experimental, 1100 ppmF, NaF and chlorhexidine 0.95% (group B, n=28); and experimental, chlorhexidine 0.95% (group C, n=28). At baseline, after 6, 12 and 24 weeks, clinical examinations were carried out. ... 查看全文

308   Clinicians’ preventive strategies for children and adolescents identified as at high risk of developing caries Clinicians’ preventive strategies for children and adolescents identified as at high risk of developing caries Prof. Dr. Helge Willner and Prof. Dr. Friedhelm Aubke    2010 International Journal of Paediatric Dentistry 2011; 21: 167–174 查看全文

309   Modeling and analysis of nest-site selection by honeybee swarms: the speed and accuracy trade-off Modeling and analysis of nest-site selection by honeybee swarms: the speed and accuracy trade-off Kevin M. Passino;Thomas D. Seeley    2005 Nest-site selection in honeybees is a process of social decision making in which the scout bees in a swarm locate several potential nest sites, evaluate them, and select the best one by means of competitive signaling. We develop a model of this process and validate that the model possesses the key features of the bees' decision-making process, as revealed by prior empirical studies. Next, we use the model to study the “design” of the nest-site selection proces... 查看全文

310   Potentiometric Determination of the Thermodynamic Solubility Product of Calcium Fluoride Potentiometric Determination of the Thermodynamic Solubility Product of Calcium Fluoride Prof. Dr. Helge Willner and Prof. Dr. Friedhelm Aubke    2010 The ion activity product of calcium fluoride is determined with calcium-and fluoride selective electrodes using the cell F-ISE/Ca2+, F−,H2O/Ca-ISE 查看全文

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