The EDGE-CALIFA survey: exploring the star formation law through variable selection

ABSTRACT We present a multilinear analysis to determine the significant predictors of star formation in galaxies using the combined EDGE-CALIFA sample of galaxies. We analyse 1845 kpc-scale lines of sight across 39 galaxies with molecular line emission measurements from EDGE combined with optical IFU data drawn from CALIFA. We use the Least Absolute Shrinkage and Selection Operator (LASSO) to identify significant factors in predicting star formation rates. We find that the local star formation rate surface density is increased by higher molecular gas surface densities and stellar surface densities. In contrast, we see lower star formation rates in systems with older stellar populations, higher gas- and stellar-phase metallicities and larger galaxy masses. We also find a significant increase in star formation rate with galactocentric radius normalized by the disc scale length, which suggests additional parameters regulating star formation rate not explored in this study.

An Investigation of Juvenile Gang Membership and Psychopathic Behavior: Evidence from Multilinear Analysis

<p>The extant literature provides evidence that gang involvement increases and individuals propensity to perpetrate antisocial behavior. Furthermore, it has been empirically support that criminal involvement increases and individuals like-hood of experiencing victimization. Antisocial personality disorder is described as engaging in aggressive behavior that is socially unacceptable; irresponsible, impulsive behavior; merged with impaired ability to empathize with victims; indifference to social norms, and frequent substance abuse (Cox, Edens, Magyar, &amp; Lilienfeld, 2013; Lilienfeld &amp; Arkowitz, 2007). Therefore, it is logical to deduce that gang affiliation also increases the probability of victimization amongst juveniles, which has been supported by by several authors. Furthermore, considering the symptomology associated with conduct disorder and operational defiant disorder it is probable that gang membership and victimization may have a critical role in the externalization of this psychological disorders symptoms. To examine this question we utilize data gathered by the Gang Resistance Education and Training (G.R.E.A.T) program which consists of (N=5,935) eight grade students from 42 different schools. These schools are located in: Arizona, California, Florida, Idaho, Illinois, Missouri, Nebraska, New Mexico, Pennsylvania, Rhode Island, and Wisconsin. The metropolitan regions the subjects reside during the data collection period are: Omaha, Las Cruces, Philadelphia, Phoenix, Torrance, Orlando, Pocatello, Will County, Kansas City, Providence, and Milwaukee. The results, limitations, and implications of the study will be discussed later.</p>

Solvent polarity studies of highly fluorescent laser dye ADS740WS and its fluorescence quenching with silver nanoparticles

Determination of ground state and excited state dipole moments of a highly fluorescent laser dye molecule ADS740WS and comparison of excited state dipole moment by Lippert, Bakhashiev, Kawski–Chamma–Viallet, McRae, Suppan, and solvent polarity methods. Kamlet–Abboud–Taft and Katritzky multilinear analysis for characterizing the solvent contribution into spectral features of the dye has also been studied. Correlation analysis of spectroscopic data with multiple polarity parameters was carried out by multiple linear regression analysis. Optical absorption and fluorescence of ADS740WS in alcohol and other solvents with attachment of silver nanoparticles (AgNPs) shows quenching of absorption and fluorescence intensities. This is due to size, shape, and coupling between the AgNPs and the dye, and energy transfer between the dye and the AgNPs. Fluorescence quenching of ADS740WS leads to many applications notably for advancement in biomolecular labeling and fluorescence patterning and chemotherapy in cancer treatment.