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 The Chemical Compositions of Accreted and in situ Galactic Globular Clusters According to SDSS/APOGEE Publication
IDDOI:10.1093/mnras/staa478Published Date2020-02-18JournalMonthly Notices of the Royal Astronomical Society, 2020-02-18
Abstract Studies of the kinematics and chemical compositions of Galactic globular clusters (GCs) enable the reconstruction of the history of star formation, chemical evolution, and mass assembly of the Galaxy. Using the latest data release (DR16) of the SDSS/APOGEE survey, we identify 3,090 stars associated with 46 GCs. Using a previously defined kinematic association, we break the sample down into eight separate groups and examine how the kinematics-based classification maps into chemical co…
 The Faint Host Galaxies of C IV Absorbers at z > 5 Publication
IDDOI:10.1093/mnras/staa377Published Date2020-02-18JournalMonthly Notices of the Royal Astronomical Society, 2020-02-18
Abstract We explore the expected galaxy environments of C IV absorbers at z > 5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z ∼ 6 galaxy stellar mass function, the Lyα forest transmission at z > 5, and the Si IV column density distribution (CDD) at z ≈ 5.5. Nonetheless, the C IV CDD remains underproduced. Comparison with observed C II/Si II equivalent width ratios and the C II line incidence suggests that a low carbon yie…
 REU Site: BIGDatA - Big Data Analytics for Cyber-physical Systems Research Grant
Award Number1950121Funding AgencyNational Science FoundationEffective Date2020-03-01Expiration Date2023-02-28Funding Amount$404,571 The funding renews a Research Experience for Undergraduates (REU) Site at New Mexico State University. Undergraduate students will participate in summer research projects guided by faculty research mentors using state-of-the-art labs and facilities. Cyber-physical systems are real-world systems, such as automotive systems, medical systems, smart homes, and manufacturing systems, that have computer algorithms and software monitoring and controlling them. These systems generate large amounts da…  Biomphalaria glabrata immunity: Post-genome advances. Publication ID31759924Published Date2020-03-01JournalDevelopmental and comparative immunology, 2020-03-01, Volume 104 The freshwater snail, Biomphalaria glabrata, is an important intermediate host in the life cycle for the human parasite Schistosoma mansoni, the causative agent of schistosomiasis. Current treatment and prevention strategies have not led to a significant decrease in disease transmission. However, the genome of B. glabrata was recently sequenced to provide additional resources to further our understanding of snail biology. This review presents an overview of recently published, post-genome stu…  Investigations on the buckling and dynamics of diving-inspired systems when entering water. Publication ID32066135Published Date2020-02-17JournalBioinspiration & biomimetics, 2020-02-17 This work provides comparative modeling approaches to determine the velocities and frequencies of various bioinspired plunge-diving systems. A nonlinear reduced-order model is developed and utilized to analyze the dive at impact considering both Timoshenko and Euler-Bernoulli beam theories. Using Hamilton's principle, the equations of motion are first derived. Then, static and dynamic buckling analyses are conducted. For this study, a geometrically simplified cone-beam system is considered, w…  Controlled curcumin release from nanofibers based on amphiphilic-block segmented polyurethanes. Publication ID31837404Published Date2020-02-15JournalInternational journal of pharmaceutics, 2020-02-15, Volume 575 A series of biodegradable amphiphilic-block segmented polyurethanes (SPUs) are designed and synthesized based on di-block and tri-block macrodiols of polycaprolactone (PCL) and polyethylene glycol (PEG). Curcumin, as a model herbal antibacterial agent, is used due to its effective inhibitory action against Gram-positive and Gram-negative bacteria. Curcumin-loaded nanofibers, with 400-900 nm diameter range, have been prepared by electrospinning of SPUs. The synthesized SPUs can be used for wou…  Fabrication of novel 2D Ag-TiO/γ-AlO/Chitosan nano-composite photocatalyst toward enhanced photocatalytic reduction of nitrate. Publication ID31669466Published Date2020-02-15JournalInternational journal of biological macromolecules, 2020-02-15, Volume 145 The presence of excess nitrate in groundwater limits it use as a drinking water supply and its removal is critical to balance the nitrogen cycle in aquatic systems. In this study, ultra-thin 2-dimensional Ag-TiO/γ-AlO/Chitosan (Ag-TiO/AlO/CS) nano-composite was synthesized for the fast reduction of nitrate under UVA irradiation from aqueous solutions. As-synthesized nano-composite was well characterized by X-ray diffraction, transmission electron microscopy, N adsorption-desorption isotherms,…  Structural Redundancy Assessment of Adjacent Precast Concrete Box-Beam Bridges in Service Publication IDDOI:10.1155/2020/5801841Published Date2020-02-15JournalAdvances in Materials Science and Engineering, 2020-02-15, Volume 2020 Present approaches for assessing bridge redundancy are mainly based on nonlinear finite element (FE) analysis. Unfortunately, the real behavior of bridges in the nonlinear range is difficult to evaluate and a sound basis for the nonlinear FE analysis is not available. In addition, a nonlinear FE analysis is not feasible for practitioners to use. To tackle this problem, a new simplified approach based on linear FE analysis and field load testing is introduced in this paper to address the parti…  Accounting for two-billion tons of stabilized soil carbon. Publication ID31767338Published Date2020-02-10JournalThe Science of the total environment, 2020-02-10, Volume 703 The pedosphere is the largest terrestrial reservoir of organic carbon, yet soil-carbon variability and its representation in Earth system models is a large source of uncertainty for carbon-cycle science and climate projections. Much of this uncertainty is attributed to local and regional-scale variability, and predicting this variation can be challenging if variable selection is based solely on a priori assumptions due to the scale-dependent nature of environmental determinants. Data mining c…  Mid-IR Spectra of the M-type Mira Variable R Tri Observed with the Spitzer IRS Publication IDDOI:10.1093/mnras/staa322Published Date2020-02-07JournalMonthly Notices of the Royal Astronomical Society, 2020-02-07 Abstract We present analysis of mid-IR spectra of the oxygen-rich Mira variable R Tri. The data were taken with the Spitzer Infrared Spectrometer (IRS) as part of a study tracking how Mira variables’ regular pulsations affect circumstellar envelopes. We detected strong emission lines at 13.87$\rm {\mu m}$, 16.18$\rm {\mu m}$, and 17.6$\rm {\mu m}$, and one strong absorption feature at 14.98$\rm {\mu m}$. The emission features at 13.87$\rm {\mu m}$and 16.18$\rm {\mu m}\$ are excited vibr…
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