Showing papers by "Texas Christian University published in 2018"

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014-2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.

An investigation of visibility and flexibility as complements to supply chain analytics: An organizational information processing theory perspective

Abstract: Many businesses are seeking to develop and exploit analytics capabilities today. Using organizational information processing theory (OIPT), we study demand visibility and supply visibility as foundational resources for analytics capability, and organizational flexibility as a complementary capability. We further examine relationships among these factors under varying conditions of market volatility, a type of environmental uncertainty. The results from our analysis of data from 191 global firms indicate that both demand and supply visibility are associated with the development of analytics capability. In turn, analytics capability is shown to be more strongly associated with operational performance when supply chain organizations also possess organizational flexibility needed to act upon analytics-generated insights quickly and efficiently. Furthermore, the empirical results indicate that analytics capability and organizational flexibility are more valuable as complementary capabilities for firms who operate in volatile markets, rather than in stable ones. These findings extend OIPT to create a better understanding of contemporary applications of information processing technologies, while also providing theoretically grounded guidance to managers in the development of analytics capabilities within their firms. This article is protected by copyright. All rights reserved.

Leadership for organizational adaptability: A theoretical synthesis and integrative framework.

Abstract: One of the biggest challenges facing leaders today is the need to position and enable organizations and people for adaptability in the face of increasingly dynamic and demanding environments. Despite this we know surprisingly little about this topic. In this paper we provide a theoretical synthesis and integrative review of research from strategy, organization theory, innovation, networks, and complexity to provide a framework of leadership for organizational adaptability. Our review shows that leadership for organizational adaptability is different from traditional leadership or leading change. It involves enabling the adaptive process by creating space for ideas advanced by entrepreneurial leaders to engage in tension with the operational system and generate innovations that scale into the system to meet the adaptive needs of the organization and its environment. Leadership for organizational adaptability calls for scholars and practitioners to recognize organizational adaptability as an important organizational outcome, and enabling leadership (i.e., enabling the adaptive process through adaptive space) as a critical form of leadership for adaptive organizations.

The Second APOKASC Catalog: The Empirical Approach

Abstract: We present a catalog of stellar properties for a large sample of 6676 evolved stars with Apache Point Observatory Galactic Evolution Experiment spectroscopic parameters and Kepler asteroseismic data analyzed using five independent techniques. Our data include evolutionary state, surface gravity, mean density, mass, radius, age, and the spectroscopic and asteroseismic measurements used to derive them. We employ a new empirical approach for combining asteroseismic measurements from different methods, calibrating the inferred stellar parameters, and estimating uncertainties. With high statistical significance, we find that asteroseismic parameters inferred from the different pipelines have systematic offsets that are not removed by accounting for differences in their solar reference values. We include theoretically motivated corrections to the large frequency spacing (Δν) scaling relation, and we calibrate the zero-point of the frequency of the maximum power (ν max) relation to be consistent with masses and radii for members of star clusters. For most targets, the parameters returned by different pipelines are in much better agreement than would be expected from the pipeline-predicted random errors, but 22% of them had at least one method not return a result and a much larger measurement dispersion. This supports the usage of multiple analysis techniques for asteroseismic stellar population studies. The measured dispersion in mass estimates for fundamental calibrators is consistent with our error model, which yields median random and systematic mass uncertainties for RGB stars of order 4%. Median random and systematic mass uncertainties are at the 9% and 8% level, respectively, for red clump stars. (Less)

The behavioral immune system: Current concerns and future directions

Abstract: Soc Personal Psychol Compass. 2018;12:e12371. https://doi.org/10.1111/spc3.12371 w Abstract The behavioral immune system is a motivational system that helps minimize infection risk by changing cognition, affect, and behavior in ways that promote pathogen avoidance. In the current paper, we review foundational concepts of the behavioral immune system and provide a brief summary of recent social psychological research on this topic. Next, we highlight current conceptual and empirical limitations of this work and delineate important questions that have the potential to drive major advances in the field. These questions include predicting the ontological development of the behavioral immune system, specifying the relationship between this system and the physiological immune system, and distinguishing conditions that elicit direct effects of situational pathogen threats versus effects that occur only in interaction with dispositional disease concerns. This discussion highlights significant challenges and underexplored topics to be addressed by the next generation of behavioral immune system research.

The Second APOKASC Catalog: The Empirical Approach.

Abstract: We present a catalog of stellar properties for a large sample of 6676 evolved stars with APOGEE spectroscopic parameters and \textit{Kepler} asteroseismic data analyzed using five independent techniques. Our data includes evolutionary state, surface gravity, mean density, mass, radius, age, and the spectroscopic and asteroseismic measurements used to derive them. We employ a new empirical approach for combining asteroseismic measurements from different methods, calibrating the inferred stellar parameters, and estimating uncertainties. With high statistical significance, we find that asteroseismic parameters inferred from the different pipelines have systematic offsets that are not removed by accounting for differences in their solar reference values. We include theoretically motivated corrections to the large frequency spacing ($\Delta u$) scaling relation, and we calibrate the zero point of the frequency of maximum power ($ u_{\rm max}$) relation to be consistent with masses and radii for members of star clusters. For most targets, the parameters returned by different pipelines are in much better agreement than would be expected from the pipeline-predicted random errors, but 22\% of them had at least one method not return a result and a much larger measurement dispersion. This supports the usage of multiple analysis techniques for asteroseismic stellar population studies. The measured dispersion in mass estimates for fundamental calibrators is consistent with our error model, which yields median random and systematic mass uncertainties for RGB stars of order 4\%. Median random and systematic mass uncertainties are at the 9\% and 8\% level respectively for RC stars.

Evidence Base on Outpatient Behavioral Treatments for Adolescent Substance Use, 2014-2017: Outcomes, Treatment Delivery, and Promising Horizons.

Abstract: This article updates the evidence base on outpatient behavioral treatments for adolescent substance use (ASU) since publication of the previous review completed for this journal by Hogue, Henderson, Ozechowski, and Robbins (2014). It first summarizes the Hogue et al. findings along with those from recent literature reviews and meta-analytic studies of ASU treatments. It then presents study design and methods criteria used to select 11 comparative studies subjected to Journal of Clinical Child and Adolescent Psychology level of support evaluation. These 11 studies are detailed in terms of their sample characteristics, methodological quality, and substance use outcomes. Cumulative level of support designations are then made for each identified treatment approach. These cumulative designations are virtually identical to those of the previous review: ecological family-based treatment, individual cognitive-behavioral therapy, and group cognitive-behavioral therapy remain well-established; behavioral family-based treatment and motivational interviewing remain probably efficacious; drug counseling remains possibly efficacious; and an updated total of 5 multicomponent treatments combining more than 1 approach (3 of which include contingency management) are deemed well-established or probably efficacious. Treatment delivery issues associated with evidence-based approaches are then reviewed, focusing on client engagement, fidelity and mediator, and predictor and moderator effects. Finally, to help accelerate innovation in ASU treatment science and practice, the article outlines promising horizons in improving youth identification and access, specifying and implementing pragmatic treatment in community settings, and leveraging emerging lessons from implementation science.

Jamming Strategies for Physical Layer Security

Abstract: This article provides a comprehensive overview on jamming strategies in the physical layer for securing wireless communications. As a complement to traditional cryptography-based approaches, physical layer based security provisioning techniques offer a number of promising features that have not been previously available. Among the physical layer security techniques, jamming is an effective way to degrade the channel quality of the eavesdroppers for ensuring security. We start by giving a brief introduction to the fundamental principles of physical layer security and jamming. Then we classify jamming strategies from three different perspectives and explain the major related designs in various scenarios. Finally, we discuss the open issues of jamming that can be helpful to foster future research.

Picturing immigration: how the media criminalizes immigrants

Abstract: A growing body of evidence demonstrates that the way the press frames policy issues can foster fear, particularly with respect to portrayals of immigrants. Building on this research, we examine ima...

Embracing uncertainty, managing complexity: Applying complexity thinking principles to transformation efforts in healthcare systems

Abstract: Complexity thinking is increasingly being embraced in healthcare, which is often described as a complex adaptive system (CAS). Applying CAS to healthcare as an explanatory model for understanding the nature of the system, and to stimulate changes and transformations within the system, is valuable. A seminar series on systems and complexity thinking hosted at the University of Toronto in 2016 offered a number of insights on applications of CAS perspectives to healthcare that we explore here. We synthesized topics from this series into a set of six insights on how complexity thinking fosters a deeper understanding of accepted ideas in healthcare, applications of CAS to actors within the system, and paradoxes in applications of complexity thinking that may require further debate: 1) a complexity lens helps us better understand the nebulous term “context”; 2) concepts of CAS may be applied differently when actors are cognizant of the system in which they operate; 3) actor responses to uncertainty within a CAS is a mechanism for emergent and intentional adaptation; 4) acknowledging complexity supports patient-centred intersectional approaches to patient care; 5) complexity perspectives can support ways that leaders manage change (and transformation) in healthcare; and 6) complexity demands different ways of implementing ideas and assessing the system. To enhance our exploration of key insights, we augmented the knowledge gleaned from the series with key articles on complexity in the literature. Ultimately, complexity thinking acknowledges the “messiness” that we seek to control in healthcare and encourages us to embrace it. This means seeing challenges as opportunities for adaptation, stimulating innovative solutions to ensure positive adaptation, leveraging the social system to enable ideas to emerge and spread across the system, and even more important, acknowledging that these adaptive actions are part of system behaviour just as much as periods of stability are. By embracing uncertainty and adapting innovatively, complexity thinking enables system actors to engage meaningfully and comfortably in healthcare system transformation.

Examining Entrepreneurship Through Indigenous Lenses

Abstract: This commentary argues that scholars need an alternative to the dominance in academic research of the U.S. model of entrepreneurship to reflect better the variety and diversity of entrepreneurial a...

When and how Board Members with Marketing Experience Facilitate Firm Growth

Abstract: Scholars have expressed concern that marketing’s influence at the strategic levels of the firm is waning. Consistent with this view, only 2.6% of firms’ board members have marketing experience. The authors suggest that this is short-sighted and that including more marketing-experienced board members (MEBMs) will increase firm growth by (1) helping firms prioritize growth as a strategic objective and (2) contributing their expertise to improve the effectiveness of revenue growth strategies. Drawing on the behavioral model of corporate governance, the authors develop a theoretical framework explicating the situational, dispositional, and structural influence moderators that alter the impact of MEBMs on firm growth. Using 64,086 director biographies from S&P 1500 firms, the authors find that MEBMs positively affect firm-level revenue growth and that this relationship is strengthened or weakened by important contingencies that occur in the firm. The findings suggest that the common practice of not inc...

Social Dollars in Online Communities: The Effect of Product, User, and Network Characteristics

Abstract: Online communities have experienced burgeoning popularity over the last decade and have become a key platform for users to share information and interests, and to engage in social interactions. Drawing on the social contagion literature, the authors examine the effect of online social connections on users’ product purchases in an online community. They assess how product, user, and network characteristics influence the social contagion effect in users’ spending behavior. The authors use a unique large-scale data set from a popular massively multiplayer online role-playing game community—consisting of users’ detailed gaming activities, their social connections, and their in-game purchases of functional and hedonic products—to examine the impact of gamers’ social networks on their purchase behavior. The analysis, based on a double-hurdle model that captures gamers’ decisions of playing and spending levels, reveals evidence of “social dollars,” whereby social interaction between gamers in the communi...

Leader perceptions and motivation as outcomes of followership role orientation and behavior

Abstract: Followership research posits that followers differ in the way they define and enact the followership role, which can have varying effects in relation to how leaders experience their own roles and responsibilities. Drawing from the role orientation literature and newly emerging research on followership, our study examines the indirect effects of followers’ co-production (co-producing leadership outcomes) and passive (deferring to leadership influence) role orientations on leader-rated outcomes of perceived follower support, leader motivation, and follower contribution to goal attainment via followers’ voice and upward delegation behaviors. Using data from 306 dyads in a Chinese organization, our results show that follower voice and upward delegation mediate the relationships linking followers’ co-production and passive role orientations with leader-rated outcomes. Our study provides evidence that followership role orientations and behaviors differentially influence leader perceptions regarding their follow...

Early development of letter specialization in left fusiform is associated with better word reading and smaller fusiform face area

Abstract: A functional region of left fusiform gyrus termed "the visual word form area" (VWFA) develops during reading acquisition to respond more strongly to printed words than to other visual stimuli. Here, we examined responses to letters among 5- and 6-year-old early kindergarten children (N = 48) with little or no school-based reading instruction who varied in their reading ability. We used functional magnetic resonance imaging (fMRI) to measure responses to individual letters, false fonts, and faces in left and right fusiform gyri. We then evaluated whether signal change and size (spatial extent) of letter-sensitive cortex (greater activation for letters versus faces) and letter-specific cortex (greater activation for letters versus false fonts) in these regions related to (a) standardized measures of word-reading ability and (b) signal change and size of face-sensitive cortex (fusiform face area or FFA; greater activation for faces versus letters). Greater letter specificity, but not letter sensitivity, in left fusiform gyrus correlated positively with word reading scores. Across children, in the left fusiform gyrus, greater size of letter-sensitive cortex correlated with lesser size of FFA. These findings are the first to suggest that in beginning readers, development of letter responsivity in left fusiform cortex is associated with both better reading ability and also a reduction of the size of left FFA that may result in right-hemisphere dominance for face perception.

Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. I. Signatures of Diffusion in the Open Cluster M67

Abstract: National Aeronautics and Space Administration 16-XRP16_2-0004 Ramon y Cajal fellowship RYC-2013-14182 Spanish Ministry of Economy and Competitiveness (MINECO) AYA-2014-58082-P National Science Foundation (NSF) AST-1311835 AST-1715662 Fondecyt 1170518 Crafoord Foundation Stiftelsen Olle Engkvist Byggmastare Alfred P. Sloan Foundation US Department of Energy Office of Science Center for High-Performance Computing at the University of Utah Brazilian Participation Group Carnegie Institution for Science Carnegie Mellon University Chilean Participation Group French Participation Group Harvard-Smithsonian Center for Astrophysics Instituto de Astrofisica de Canarias Johns Hopkins University Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo Lawrence Berkeley National Laboratory Leibniz Institut fur Astrophysik Potsdam (AIP) Max-Planck-Institut fur Astronomie (MPIA Heidelberg) Max-Planck-Institut fur Astrophysik (MPA Garching) Max-Planck-Institut fur Extraterrestrische Physik (MPE) National Astronomical Observatory of China New Mexico State University New York University University of Notre Dame Observatorio Nacional/MCTI Ohio State University Pennsylvania State University Shanghai Astronomical Observatory United Kingdom Participation Group Universidad Nacional Autonoma de Mexico University of Arizona University of Colorado Boulder University of Oxford University of Portsmouth University of Utah University of Virginia University of Washington University of Wisconsin Vanderbilt University Yale University

The Network Architecture of Human Capital: A Relational Identity Perspective

Abstract: Managing constellations of employee relationships is a core competency in knowledge-based organizations. It is timely, then, that human resource management scholars and practitioners are adopting a...

Hazard Experience, Geophysical Vulnerability, and Flood Risk Perceptions in a Postdisaster City, the Case of New Orleans

Abstract: This article investigates the determinants of flood risk perceptions in New Orleans, Louisiana (United States), a deltaic coastal city highly vulnerable to seasonal nuisance flooding and hurricane-induced deluges and storm surges. Few studies have investigated the influence of hazard experience, geophysical vulnerability (hazard proximity), and risk perceptions in cities undergoing postdisaster recovery and rebuilding. We use ordinal logistic regression techniques to analyze experiential, geophysical, and sociodemographic variables derived from a survey of 384 residents in seven neighborhoods. We find that residents living in neighborhoods that flooded during Hurricane Katrina exhibit higher levels of perceived risk than those residents living in neighborhoods that did not flood. In addition, findings suggest that flood risk perception is positively associated with female gender, lower income, and direct flood experiences. In conclusion, we discuss the implications of these findings for theoretical and empirical research on environmental risk, flood risk communication strategies, and flood hazards planning.

Information sharing and decision-making in multidisciplinary crisis management teams

Abstract: Multidisciplinary crisis management teams consist of highly experienced professionals who combine their discipline‐specific expertise in order to respond to critical situations characterized by high levels of uncertainty, complexity, and dynamism. Although the existing literatures on team information processing and decision‐making are mature, research specifically investigating multidisciplinary teams facing crisis situations is limited; however, given increasingly turbulent external environments that produce complex crisis situations, increasing numbers of organizations are likely to call upon multidisciplinary teams to address such events. In this paper, we investigate information processing and decision‐making behaviors in an exploratory study of 12 organizational multidisciplinary crisis management teams. We identify three types of information sharing and track the emergence of distinct communicative phases as well as differences between high‐ and low‐performing teams in the occurrence of sequences of information sharing behaviors. We close by discussing implications for research in this area and for managers of crisis management teams.

BS in the boardroom: Benevolent sexism and board chair orientations

Abstract: Research Summary Though research has focused on the ascent and acceptance of female CEOs, the post-promotion circumstances female CEOs face remain unclear. In this study, we focus on a critical post-promotion circumstance: the board chair-CEO relationship. Drawing on the gender stereotype literature, agency theory, and stewardship theory, we posit that firms appointing a female CEO are more likely to adopt a collaboration board chair orientation and less likely to adopt a control orientation. We further predict this effect is attenuated by female board representation. Using a sample of new S&P 1500 CEOs, we find support for our predictions regarding the collaboration orientation but not the control orientation. This research provides some evidence of benevolent sexism in the boardroom, with female directors acting as a countervailing influence. Managerial Summary Whereas the notion that females encounter a glass ceiling on their path toward CEO is well documented, the conditions female CEOs encounter after promotion are less understood. The relationship between the board chair and the CEO is one important post-promotion condition. Board chairs can focus on monitoring and/or working together with the CEO. We suggest board chairs are more likely to work in close collaboration with female CEOs than with male CEOs. We attribute this to benevolent sexism, which explains that board chairs are more likely to collaborate with female CEOs because they view females as more conducive to, and in need of, this type of relationship. We also suggest this benevolent sexism is less prevalent when there are more females on the board.

Associations Between Resilience and the Well-Being of Mothers of Children with Autism Spectrum Disorder and Other Developmental Disabilities.

Abstract: There is variability in the extent to which mothers are affected by the behavior problems of their children with developmental disabilities (DD). We explore whether maternal resilience functions as a protective or compensatory factor. In Studies 1 and 2, using moderated multiple regression models, we found evidence that maternal resilience functioned as a compensatory factor-having a significant independent main effect relationship with well-being outcomes in mothers of children with DD and autism spectrum disorder. However, there was no longitudinal association between resilience and maternal well-being outcomes. There was little evidence of the role of resilience as a protective factor between child behavior problems and maternal well-being in both studies.