Institution
Iowa State University
Education•Ames, Iowa, United States•
About: Iowa State University is a education organization based out in Ames, Iowa, United States. It is known for research contribution in the topics: Population & Gene. The organization has 50151 authors who have published 107716 publications receiving 3355909 citations. The organization is also known as: Iowa State University of Science and Technology & Iowa State College.
Topics: Population, Gene, Catalysis, Context (language use), Superconductivity
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors examine the underexplored tensions and complementarities between bridging ties and strong ties in innovation-seeking alliances and propose that their effects and complementarity influence alliance ambidexterity because they facilitate knowledge integration at the project level.
Abstract: This study examines the underexplored tensions and complementarities between bridging ties and strong ties in innovation-seeking alliances. Bridging ties span structural holes to provide innovation potential but lack integration capacity, and strong ties provide integration capacity but lack innovation potential. We theoretically develop the idea that—notwithstanding their tensions—strong ties complement bridging ties in enhancing alliance ambidexterity at the project level. While bridging ties provide access to diverse, structural hole-spanning perspectives and capabilities, strong ties help integrate them to realize an innovation. We also propose that their effects and complementarities influence alliance ambidexterity because they facilitate knowledge integration at the project level. Tests using data on 42 innovation-seeking project alliances involving a major American services conglomerate and its alliance partners support the majority of the proposed ideas. Implications for interfirm network configuration, strategic alliances, and the broader strategy literature are also discussed. Copyright © 2007 John Wiley & Sons, Ltd.
583 citations
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TL;DR: For example, this article found that there are consistent sex differences favoring males in mathematical reasoning ability, as measured by the mathematics section of the SAT (SAT-M), and these differences are most pronounced at the highest levels of mathematical reasoning, and they are stable over time.
Abstract: Several hundred thousand intellectually talented 12-to 13-year-olds have been tested nationwide over the past 16 years with the mathematics and verbal sections of the Scholastic Aptitude Test (SAT). Although no sex differences in verbal ability have been found, there have been consistent sex differences favoring males in mathematical reasoning ability, as measured by the mathematics section of the SAT (SAT-M). These differences are most pronounced at the highest levels of mathematical reasoning, they are stable over time, and they are observed in other countries as well. The sex difference in mathematical reasoning ability can predict subsequent sex differences in achievement in mathematics and science and is therefore of practical importance. To date a primarily environmental explanation for the difference in ability has not received support from the numerous studies conducted over many years by the staff of Study of Mathematically Precocious Youth (SMPY) and others. We have studied some of the classical environmental hypotheses: attitudes toward mathematics, perceived usefulness of mathematics, confidence, expectations/ encouragement from parents and others, sex-typing, and differential course-taking. In addition, several physiological correlates of extremely high mathematical reasoning ability have been identified (left-handedness, allergies, myopia, and perhaps bilateral representation of cognitive functions and prenatal hormonal exposure). It is therefore proposed that the sex difference in SAT-M scores among intellectually talented students, which may be related to greater male variability, results from both environmental and biological factors.
582 citations
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TL;DR: The authors recast civil war in a dyadic perspective, and consider how nonstate actor attributes and their relationship to the state influence conflict dynamics, finding support for many of their conjectures.
Abstract: Theories of conflict emphasize dyadic interaction, yet existing empirical studies of civil war focus largely on state attributes and pay little attention to nonstate antagonists. We recast civil war in a dyadic perspective, and consider how nonstate actor attributes and their relationship to the state influence conflict dynamics. We argue that strong rebels, who pose a military challenge to the government, are likely to lead to short wars and concessions. Conflicts where rebels seem weak can become prolonged if rebels can operate in the periphery so as to defy a government victory yet are not strong enough to extract concessions. Conflicts should be shorter when potential insurgents can rely on alternative political means to violence. We examine these hypotheses in a dyadic analysis of civil war duration and outcomes, using new data on nonstate actors and conflict attributes, finding support for many of our conjectures.
582 citations
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TL;DR: Genotyping and phylogenetic analyses demonstrated that the four swine viruses emerged through two different pathways, and it remains to be determined if either of these recently emerged viruses will become established in the pigs in North America and whether they will become an economic burden.
Abstract: In late summer through early winter of 1998, there were several outbreaks of respiratory disease in the swine herds of North Carolina, Texas, Minnesota, and Iowa. Four viral isolates from outbreaks in different states were analyzed genetically. Genotyping and phylogenetic analyses demonstrated that the four swine viruses had emerged through two different pathways. The North Carolina isolate is the product of genetic reassortment between H3N2 human and classic swine H1N1 influenza viruses, while the others arose from reassortment of human H3N2, classic swine H1N1, and avian viral genes. The hemagglutinin genes of the four isolates were all derived from the human H3N2 virus circulating in 1995. It remains to be determined if either of these recently emerged viruses will become established in the pigs in North America and whether they will become an economic burden.
581 citations
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Wellcome Trust Sanger Institute1, National Autonomous University of Mexico2, University of Buenos Aires3, Iowa State University4, University of Zurich5, University of the Republic6, University of Oxford7, Beijing Institute of Genomics8, University of Toronto9, University of Würzburg10, Natural History Museum11, National University of Ireland, Galway12, University of Calgary13, McGill University14
TL;DR: An analysis of tapeworm genome sequences using the human-infective species Echinococcus multilocularis, E. granulosus, Taenia solium and the laboratory model Hymenolepis microstoma offers insights into the evolution of parasitism and identifies new potential drug targets.
Abstract: Tapeworms (Cestoda) cause neglected diseases that can be fatal and are difficult to treat, owing to inefficient drugs. Here we present an analysis of tapeworm genome sequences using the human-infective species Echinococcus multilocularis, E. granulosus, Taenia solium and the laboratory model Hymenolepis microstoma as examples. The 115- to 141-megabase genomes offer insights into the evolution of parasitism. Synteny is maintained with distantly related blood flukes but we find extreme losses of genes and pathways that are ubiquitous in other animals, including 34 homeobox families and several determinants of stem cell fate. Tapeworms have specialized detoxification pathways, metabolism that is finely tuned to rely on nutrients scavenged from their hosts, and species-specific expansions of non-canonical heat shock proteins and families of known antigens. We identify new potential drug targets, including some on which existing pharmaceuticals may act. The genomes provide a rich resource to underpin the development of urgently needed treatments and control.
581 citations
Authors
Showing all 50392 results
Name | H-index | Papers | Citations |
---|---|---|---|
Feng Zhang | 172 | 1278 | 181865 |
Yang Gao | 168 | 2047 | 146301 |
Steven N. Blair | 165 | 879 | 132929 |
Carlos Bustamante | 161 | 770 | 106053 |
Darien Wood | 160 | 2174 | 136596 |
Pete Smith | 156 | 2464 | 138819 |
Richard J. Davidson | 156 | 602 | 91414 |
Mark Raymond Adams | 147 | 1187 | 135038 |
H. A. Neal | 141 | 1903 | 115480 |
Mitchell Wayne | 139 | 1810 | 108776 |
Frank Filthaut | 135 | 1684 | 103590 |
Tiziano Rovelli | 135 | 1441 | 90518 |
Francesco Navarria | 135 | 1535 | 91427 |
Francesca Romana Cavallo | 135 | 1571 | 92392 |
Yasar Onel | 134 | 1424 | 92200 |