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Full-Text Articles in Physical Sciences and Mathematics
Creating Hertzprung-Russel Diagrams Of Open Clusters, Margaret Jensen
Creating Hertzprung-Russel Diagrams Of Open Clusters, Margaret Jensen
Physics Capstone Projects
This research project is meant to set up Utah State University’s 20 inch diameter telescope and use imaging techniques to do research science with stellar clusters. Using known information taken from stellar catalogues, open clusters will be selected to image. From the im- age, absolute magnitudes or luminocities will be collected from each star in the cluster using imaging software. We will then compare these to their spectral types, or tem- peratures, to create Hertzprung-Russell diagrams of the open clusters. A Hertzprung-Russell (H-R) diagram is a scatter plot of luminocity vs spectral type for stars. The following report will explain …
Effect Of Trans-Cis Photoisomerization On Phase Equilibria And Phase Transition Of Liquid-Crystalline Azobenzene Chromophore And Its Blends With Reactive Mesogenic Diacrylate, Namil Kim, Quan Li, Thein Kyu
Effect Of Trans-Cis Photoisomerization On Phase Equilibria And Phase Transition Of Liquid-Crystalline Azobenzene Chromophore And Its Blends With Reactive Mesogenic Diacrylate, Namil Kim, Quan Li, Thein Kyu
Thein Kyu
Photoisomerization-induced phase transition of neat liquid-crystalline azobenzene chromophore (LCAC) and its effect on phase diagrams of its mixtures with reactive mesogenic diacrylate monomer (RM257) have been investigated experimentally and theoretically. Upon irradiation with ultraviolet light, the nematic phase of LCAC transformed to isotropic, while the crystal phase showed corrugated textures on the surface (i.e., ripples). The phase-transition temperatures and corresponding morphologies of the blends have been investigated by means of differential scanning calorimetry and optical microscopy. A theoretical phase diagram of a binary nematic and crystalline system was constructed by self-consistently solving the combined free energies of Flory-Huggins, Maier-Saupe, and …