Missouri University of Science and Technology

About: Missouri University of Science and Technology is a education organization based out in Rolla, Missouri, United States. It is known for research contribution in the topics: Control theory & Artificial neural network. The organization has 9380 authors who have published 21161 publications receiving 462544 citations. The organization is also known as: Missouri S&T & University of Missouri–Rolla.

Mechanical Relaxations in Mixed‐Alkali Silicate Glasses: I, Results

Abstract: The internal friction of silicate glasses containing mixtures of Li-Na, Li-K, Li-Rb, Li-Cs, Na-K, Na-Rb, Na-Cs, and K-Rb was measured from -180° to 500°C at a frequency of 0.4 Hz. Values for the density, index of refraction, and dynamic shear modulus are also reported. With small additions of a second alkali, a new internal friction peak was observed in addition to the two peaks originally present in the glasses containing only one alkali. The magnitude of this new peak was especially sensitive to small amounts (less than 1 mol%) of a second alkali. Activation energies are given for the alkali peak in Li-Cs glasses and for the new internal friction peak in Li-Na glasses.

Computational methods for electric power systems

Abstract: Introduction The Solution of Linear Systems Gaussian Elimination LU Factorization Condition Numbers and Error Propagation Relaxation Methods Conjugate Gradient Methods Generalized Minimal Residual Algorithm (GMRES) Systems of Nonlinear Equations Fixed Point Iteration Newton-Raphson Iteration Continuation Methods Secant Method Numerical Differentiation Power System Applications Sparse Matrix Solution Techniques Storage Methods Sparse Matrix Representation Ordering Schemes Power System Applications Numerical Integration One-Step Methods Multistep Methods Accuracy and Error Analysis Numerical Stability Analysis Stiff Systems Step-Size Selection Differential-Algebraic Equations Power System Applications Optimization Least Squares State Estimation Linear Programming Nonlinear Programming Power System Applications Eigenvalue Problems The Power Method The QR Algorithm Arnoldi Methods Singular Value Decomposition Modal Identification Power System Applications

Capillary electrophoretic enantioseparations using macrocyclic antibiotics as chiral selectors

Abstract: Macrocyclic antibiotics are the newest class of chiral selector used in capillary electrophoresis (CE) enantioseparations. Two basic types of compounds have proven to produce useful enantioseparations. They are the ansa compounds and the glycopeptides. The ansa compounds best resolve basic or cationic racemates while the glycopeptides best resolve acidic or anionic analytes. The structure and use of these chiral selectors are discussed. The factors affecting separation and the separation mechanism are considered as well.

Pressureless sintering of carbon nanotube–Al2O3 composites

Abstract: Alumina ceramics reinforced with 1, 3, or 5 vol.% multi-walled carbon nanotubes (CNTs) were densified by pressureless sintering. Commercial CNTs were purified by acid treatment and then dispersed in water at pH 12. The dispersed CNTs were mixed with Al 2 O 3 powder, which was also dispersed in water at pH 12. The mixture was freeze dried to prevent segregation by differential sedimentation during solvent evaporation. Cylindrical pellets were formed by uniaxial pressing and then densified by heating in flowing argon. The resulting pellets had relative densities as high as ∼99% after sintering at 1500 °C for 2 h. Higher temperatures or longer times resulted in lower densities and weight loss due to degradation of the CNTs by reaction with the Al 2 O 3 . A CNT/Al 2 O 3 composite containing 1 vol.% CNT had a higher flexure strength (∼540 MPa) than pure Al 2 O 3 densified under similar conditions (∼400 MPa). Improved fracture toughness of CNT–Al 2 O 3 composites was attributed to CNT pullout. This study has shown, for the first time, that CNT/Al 2 O 3 composites can be densified by pressureless sintering without damage to the CNTs.