Boole's Method I. A Modern Version

A rigorous, modern version of Boole's algebra of logic is presented, based partly on the 1890s treatment of Ernst Schroder

Effect of Problem-Based Learning on Critical Thinking Ability and Content Knowledge of Secondary Agriculture

The thesis from which this item is derived can be found at http://hdl.handle.net/10355/4180.Secondary Agriculture teachers at twelve schools were randomly assigned to supervised study treatment or problem-based learning (PBL) groups for a total sample (n = 140) with 77 students in the PBL treatment group and 63 in the supervised study comparison group. The purpose of the study was to determine the effect of problem-based learning on critical thinking ability and content knowledge. The study used both pre-tests and control groups along with post-tests in assessing critical thinking ability and content knowledge acquisition. Students were tested before and after a Quail Management Unit to determine content knowledge as well as given Watson-Glaser Critical Thinking Appraisal (WGCTA) to measure the critical thinking ability of secondary agriculture students

Debris and micrometeorite impact measurements in the laboratory

A method was developed to simulate space debris in the laboratory. This method, which is an outgrowth of research in inertial confinement fusion (ICF), uses laser ablation to accelerate material. Using this method, single 60 micron aluminum spheres were accelerated to 15 km/sec and larger 500 micron aluminum spheres were accelerated to 2 km/sec. Also, many small (less than 10 micron diameter) irregularly shaped particles were accelerated to speeds of 100 km/sec

Tarnished Plant Bugs in Cotton (Research Information Sheet #101)

This publication describes tarnished plant bugs and includes information on damage, biology, varietal susceptibility, monitoring, insecticide resistance and efficacy.https://digitalcommons.lsu.edu/agcenter_researchinfosheets/1010/thumbnail.jp

Simulations of the infrared, Raman, and 2D-IR photon echo spectra of water in nanoscale silica pores

Vibrational spectroscopy is frequently used to characterize nanoconfined liquids and probe the effect of the confining framework on the liquid structure and dynamics relative to the corresponding bulk fluid. However, it is still unclear what molecular-level information can be obtained from such measurements. In this paper, we address this question by using molecular dynamics (MD) simulations to reproduce the linear infrared (IR), Raman, and two-dimensional IR (2D-IR) photon echo spectra for water confined within hydrophilic (hydroxyl-terminated) silica mesopores. To simplify the spectra the OH stretching region of isotopically dilute HOD in D2O is considered. An empirical mapping approach is used to obtain the OH vibrational frequencies, transition dipoles, and transition polarizabilities from the MD simulations. The simulated linear IR and Raman spectra are in good general agreement with measured spectra of water in mesoporous silica reported in the literature. The key effect of confinement on the water spectrum is a vibrational blueshift for OH groups that are closest to the pore interface. The blueshift can be attributed to the weaker hydrogen bonds (H-bonds) formed between the OH groups and silica oxygen acceptors. Non-Condon effects greatly diminish the contribution of these OH moieties to the linear IR spectrum, but these weaker H-bonds are readily apparent in the Raman spectrum. The 2D-IR spectra have not yet been measured and thus the present results represent a prediction. The simulated spectra indicates that it should be possible to probe the slower spectral diffusion of confined water compared to the bulk liquid by analysis of the 2D-IR spectra