484 research outputs found
HII 2407: an eclipsing binary revealed by K2 observations of the Pleiades
No full textThe material presented herein is based upon work supported in 2015 by the National Science Foundation Graduate Research Fellowship under grant No. DGE1144469. T.J.D. gratefully acknowledges support from France Córdova through the Neugebauer Scholarship. This research was partially supported by an appointment to the NASA Postdoctoral Program at the Ames Research Center, administered by Oak Ridge Associated Universities through a contract with NASA. Support for this work was provided by NASA via grant NNX15AV62G. C.B. acknowledges support from the Alfred P. Sloan Foundation. A.C.C. acknowledges support from STFC grant ST/M001296/1. Funding for WASP comes from consortium universities and from UKs Science and Technology Facilities Council.The star HII 2407 is a member of the relatively young Pleiades star cluster and was previously discovered to be a single-lined spectroscopic binary. It is newly identified here within Kepler/K2 photometric time series data as an eclipsing binary system. Mutual fitting of the radial velocity and photometric data leads to an orbital solution and constraints on fundamental stellar parameters. While the primary has arrived on the main sequence, the secondary is still pre-main sequence and we compare our results for the M/M⊙ and R/R⊙ values with stellar evolutionary models. We also demonstrate that the system is likely to be tidally synchronized. Follow-up infrared spectroscopy is likely to reveal the lines of the secondary, allowing for dynamically measured masses and elevating the system to benchmark eclipsing binary status.Peer reviewe
William B. SwannWhen Can it Be Said, “You Are What You Know”? A Multilevel Analysis of Expertise, Identity, and Knowledge Sharing in Teams
No full textI would like to thank the following people for their parts in this dissertation: Kyle Lewis, for inspiring me, guiding me, and encouraging me to work to my full potential. Janet Dukerich, for helping me to see the bigger picture at every turn. Caroline Bartel, for keeping me mindful that doing good work requires a deep understanding of the work of others. George Huber, for offering suggestions and improvements that never would have occurred to me. Bill Swann, for working with me to navigate the sometimes-murky waters. And finally my wife Tanis, for her endless patience and tireless support
Figure S6 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S6 (lef). Fractions of duplicated reads per sample.Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 62, DOI: 10.5281/zenodo.787182
Figure S12 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S12 (lef). Numbers of taxa per alignment.Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 64, DOI: 10.5281/zenodo.787182
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Relevant factors in the path of successful implementation of Lean
No full texttextIn any business environment companies experience challenges and competition.
In this current worldwide economic crisis, the stakes are now higher. With every crisis
comes opportunity. The best companies with the best methods and processes that create
highest quality product for less money will have an extraordinary advantage over their
less efficient, lower quality competition. The term ‘Lean’ describes how Toyota does
business: fewer humans, less effort, less investment, fewer defects, less time to develop,
less inventory. For companies that have truly understood and implemented these
principles the effects are significant; but many others have failed Lean initiatives. What
factors are necessary for a company to successfully adopt the processes proven by over
50 years of success in Toyota? Using both primary and secondary research, I compared
attributes of four companies, three of which were successful, and one that did not make
the conversion. Three main factors emerged, the Technical Factor -- knowing both your
core business and having a deep understanding of Lean principles, the Management
Factor -- strong leadership operating within Lean principles and with hands-on approach,
and the Human Factor -- approaching the workforce with respect and employee
engagement in problem-solving process. The following is a brief review of these factors
and the tools and concepts that undergird them.Engineering Managemen
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When can it be said, “you are what you know”?: a multilevel analysis of expertise, identity, and knowledge sharing in teams
No full texttextIndividually held knowledge is one of an organization’s most valuable assets. The extent to which an organization can leverage that asset depends on its members’ not only applying knowledge in their work, but also exchanging and transferring knowledge with others in the organization. We still know very little, however, about why some knowledge workers are more or less willing to share their specialized knowledge with others. I argue that a robust explanation can be found in the risks or opportunities that knowledge sharing poses to personal identity. Specifically, knowledge workers’ willingness to share knowledge with others can be explained by the importance they place on that component of personal identity associated with expertise (i.e., their expertise identity). I systematically explore contingency factors that might influence the effect of knowledge workers’ expertise identity on their willingness to share knowledge, including other aspects of the self, dyadic social relationships, team identification, and the organizational environment. Finally, I argue that the effects of people’s knowledge sharing will be evidenced in the learning outcomes realized by those around them. I conducted a cross-sectional survey study at a national engineering firm. The final sample included 221 members of 40 continuing teams (55% response rate). In addition to self-report data, surveys captured respondents’ round-robin peer ratings of fellow team members on multiple constructs, including a measure of individuals’ willingness to share their specialized expertise with others in terms of sharing the full range of personal techniques, reasoning, and experience that form the basis of their own mastery. I conducted analyses using multilevel modeling and social relations modeling techniques. Results supported 4 of 6 hypotheses. An individual’s willingness to share knowledge with others was higher when expertise identity was high and dyadic trust, receiver expertise, and team identification were also high. Further, people with high expertise identity were less willing to share knowledge than people with low expertise identity when dyadic trust, receiver expertise, and team identification were low. Implications of these results, limitations of the study, and directions for future research are discussed.Managemen
Figure S35 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S35. Mimosoid taxon and genus richness per half degree latitude/longitude grid cell.Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 74, DOI: 10.5281/zenodo.787182
Figure S34 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S34. Metachronogram with the names and locations of all subtrees (coloured branches) that were grafed onto the phylogenomic backbone (black branches).Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 74, DOI: 10.5281/zenodo.787182
Figure S17 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S17. Phylogeny of Caesalpinioideae. RAxML species tree based on the nucleotide single-copy genes alignment. Bootstrap support values are only shown for nodes with <100% bootstrap support.Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 66, DOI: 10.5281/zenodo.787182
Figure S18 in Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time
No full textFigure S18. Phylogeny of Caesalpinioideae. RAxML species tree based on the nucleotide alignment of all genes without orthology assessment. Bootstrap support values are only shown for nodes with <100% bootstrap support.Published as part of Jens J. Ringelberg, Erik J. M. Koenen, Benjamin Sauter, Anahita Aebli, Juliana G. Rando, João R. Iganci, Luciano P. de Queiroz, Daniel J. Murphy, Myriam Gaudeu, Anne Bruneau, Melissa Luckow, Gwilym P. Lewis, Joseph T. Miller, Marcelo F. Simon, Lucas S. B. Jordão, Matías Morales, C. Donovan Bailey, Madhugiri Nageswara-Rao, James A. Nicholls, Oriane Loiseau, R. Toby Pennington, Kyle G. Dexter, Niklaus E. Zimmermann & Colin E. Hughes, 2023, Supplementary Materials for Precipitation is the main axis of tropical plant phylogenetic turnover across space and time, pp. 2-111 in Science Advances (suppl.) 9 on page 66, DOI: 10.5281/zenodo.787182
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