Density-functional chemical shielding calculations are reported for the alanine dipeptide with a variety of backbone torsion angles and for methane and N-methylacetamide complexes with rare gases, monatomic ions, water, and other amides. These fragment systems model electrostatic, nonbonded, and hydrogen bonding interactions in proteins and have been investigated at a variety of geometries. The...

The addition of steel fibers into concrete improves the postcracking tensile strength of hardened concrete and hence significantly enhances the shear strength of reinforced concrete reinforced concrete beams. However, developing an accurate model for predicting the shear strength of steel fiber reinforced concrete (SFRC) beams is a challenging task as there are several parameters such as the co...

The possibility of cluster emission from trans-lead (86≤Z≤96) region periodic chart has been explored comprehensively by employing few empirical formulas which are modified adding angular momentum (l) or isospin-dependent (I=(N−Z)/A) both terms for the calculation decay half-lives. These versions found with lesser χ2 per degree freedom and root mean-square error, in addition to smaller values s...

background: this study aimed to investigate and compare the bacterial safety of handmade and commercial ready‑to‑use enteral feeding formulas used in an iranian teaching hospital. methods: in this experimental study, a total number of 70 samples (21 handmade formulas sampled at two sampling times, i.e. the time of preparation and 18 h after preparation, and 28 commercial ready‑to‑use formulas) ...

Engineering data contains the experiences and knowhow of experts. Data mining technique is useful to extract knowledge or information from the accumulated existing data. Although Korean shipyards have accumulated a great amount of data, they do not have appropriate tools to utilize the data in practical works. Most of shipyards utilize empirical formulas for the prediction of design parameters ...

The commonsensical assumption that any language has only finitely many words is shown to be false by a combination of formal and empirical arguments. Zipf's Law and related formulas are investigated and a more complex model is offered.

The aim of this study was to determine the correlation of ultrasonographic estimates of testicular volume with true testicular volume and to compare the accuracy and precision of the three most commonly utilized formulas. A total of 15 patients underwent high-resolution ultrasonography (US) analysis for testicular volume before orchiectomy. Testicular volume was calculated using three common fo...

We study anisotropic undersampling schemes like those used in multi-dimensional NMR spectroscopy and MR imaging, which sample exhaustively in certain time dimensions and randomly in others. Our analysis shows that anisotropic undersampling schemes are equivalent to certain block-diagonal measurement systems. We develop novel exact formulas for the sparsity/undersampling tradeoffs in such measur...