Texas Christian University

About: Texas Christian University is a education organization based out in Fort Worth, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 3245 authors who have published 8258 publications receiving 282216 citations. The organization is also known as: TCU & Texas Christian University, TCU.

Further Evidence on the Extent and Origins of JIT's Profitability Effects

Abstract: Empirical research provides scant evidence that just‐in‐time (JIT) adopters outperform their non‐adopting industry peers. Using a sample of 201 JIT adopters and matched non‐adopters, we examine the relation between financial performance and JIT. Our sample‐wide results indicate that JIT adopters improve financial performance relative to non‐adopters, and that profit margin, rather than asset turnover, is the primary source of such improvement. However, results of additional analyses suggest that JIT adopters below a firm‐size threshold do not improve financial performance, a finding that reconciles our study to Balakrishnan et al. (1996), which examined a JIT adopter sample that included a greater proportion of small firms.

Multirelational semantic maps

Abstract: Research on multirelational semantic maps is laden with promise for educational applications, but the development of knowledge mapping systems has been largely unsystematic. This paper describes the distinctive features of knowledge maps, discusses their origins, and explores some of the strengths and weaknesses of the wide variety of maps and mapping approaches that have been appearing in the literature over the past several years. Research findings pertaining to maps' potential and actual uses in educational settings are summarized, with some indepth attention to the more programmatic efforts of Novak as well as to our own mapping system. Suggestions are made for future exploration of, and experimentation on, maps as unique tools for organizing, representing, and communicating a wide variety of knowledge domains.

Superhard B–C–N materials synthesized in nanostructured bulks

Abstract: We report here the high-pressure synthesis of well-sintered millimeter-sized bulks of superhard BC2N and BC4N materials in the form of a nanocrystalline composite with diamond-like amorphous carbon grain boundaries. The nanostructured superhard B–C–N material bulks were synthesized under high P–T conditions from amorphous phases of the ball-milled molar mixtures. The synthetic B–C–N samples were characterized by synchrotron x-ray diffraction, high-resolution transmission electron microscope, electron energy-loss spectra, and indentation hardness measurements. These new high-pressure phases of B–C–N compound have extreme hardnesses, second only to diamond. Comparative studies of the high P–T synthetic products of BC2N, BC4N, and segregated phases of diamond + cBN composite confirm the existence of the single B–C–N ternary phases.

Why is Family Firms’ Internationalization Unique? A Meta–Analysis:

Abstract: Despite its importance, there is no clear understanding of the uniqueness of family firms' internationalization. This article sheds new light on this issue with a meta-analysis of 76 studies covering 41 countries. We show that the considerable study and cross-country differences in the relationship between family firm and internationalization are explained by the roles of family control, internationalization types, and home countries' institutional contexts (i.e., minority shareholders protection and generalized trust of people from other countries). Therefore, we examine the existing divergent results using theories that reconcile some of these mixed findings and shed light on family firms' specific internationalization challenges.

Chemodynamics of the Milky Way - I. The first year of APOGEE data

Abstract: We investigate the chemo-kinematic properties of the Milky Way disc by exploring the first year of data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE), and compare our results to smaller optical high-resolution samples in the literature, as well as results from lower resolution surveys such as GCS, SEGUE and RAVE. We start by selecting a high-quality sample in terms of chemistry ($\sim$ 20.000 stars) and, after computing distances and orbital parameters for this sample, we employ a number of useful subsets to formulate constraints on Galactic chemical and chemodynamical evolution processes in the Solar neighbourhood and beyond (e.g., metallicity distributions -- MDFs, [$\alpha$/Fe] vs. [Fe/H] diagrams, and abundance gradients). Our red giant sample spans distances as large as 10 kpc from the Sun. We find remarkable agreement between the recently published local (d $<$ 100 pc) high-resolution high-S/N HARPS sample and our local HQ sample (d $<$ 1 kpc). The local MDF peaks slightly below solar metallicity, and exhibits an extended tail towards [Fe/H] $= -$1, whereas a sharper cut-off is seen at larger metallicities. The APOGEE data also confirm the existence of a gap in the [$\alpha$/Fe] vs. [Fe/H] abundance diagram. When expanding our sample to cover three different Galactocentric distance bins, we find the high-[$\alpha$/Fe] stars to be rare towards the outer zones, as previously suggested in the literature. For the gradients in [Fe/H] and [$\alpha$/Fe], measured over a range of 6 $ < $ R $ <$ 11 kpc in Galactocentric distance, we find a good agreement with the gradients traced by the GCS and RAVE dwarf samples. For stars with 1.5 $<$ z $<$ 3 kpc, we find a positive metallicity gradient and a negative gradient in [$\alpha$/Fe].