Showing papers by "University of Missouri published in 2006"
University of Melbourne1, Stony Brook University2, City University of New York3, Princeton University4, University of Lausanne5, University of California, Berkeley6, University of Alaska Fairbanks7, National Institute of Water and Atmospheric Research8, Commonwealth Scientific and Industrial Research Organisation9, University of São Paulo10, University of Missouri11, Consejo Nacional de Ciencia y Tecnología12, University of Kansas13, Landcare Research14, AT&T15, McGill University16, James Cook University17, Swiss Federal Institute for Forest, Snow and Landscape Research18
TL;DR: This work compared 16 modelling methods over 226 species from 6 regions of the world, creating the most comprehensive set of model comparisons to date and found that presence-only data were effective for modelling species' distributions for many species and regions.
Abstract: Prediction of species' distributions is central to diverse applications in ecology, evolution and conservation science. There is increasing electronic access to vast sets of occurrence records in museums and herbaria, yet little effective guidance on how best to use this information in the context of numerous approaches for modelling distributions. To meet this need, we compared 16 modelling methods over 226 species from 6 regions of the world, creating the most comprehensive set of model comparisons to date. We used presence-only data to fit models, and independent presence-absence data to evaluate the predictions. Along with well-established modelling methods such as generalised additive models and GARP and BIOCLIM, we explored methods that either have been developed recently or have rarely been applied to modelling species' distributions. These include machine-learning methods and community models, both of which have features that may make them particularly well suited to noisy or sparse information, as is typical of species' occurrence data. Presence-only data were effective for modelling species' distributions for many species and regions. The novel methods consistently outperformed more established methods. The results of our analysis are promising for the use of data from museums and herbaria, especially as methods suited to the noise inherent in such data improve.
7,589 citations
TL;DR: The addition of bevacizumab to paclitaxel plus carboplatin in the treatment of selected patients with non-small-cell lung cancer has a significant survival benefit with the risk of increased treatment-related deaths.
Abstract: bevacizumab, as compared with 10.3 months in the chemotherapy-alone group (hazard ratio for death, 0.79; P = 0.003). The median progression-free survival in the two groups was 6.2 and 4.5 months, respectively (hazard ratio for disease progression, 0.66; P<0.001), with corresponding response rates of 35% and 15% (P<0.001). Rates of clinically significant bleeding were 4.4% and 0.7%, respectively (P<0.001). There were 15 treatment-related deaths in the chemotherapy-plus-bevacizumab group, including 5 from pulmonary hemorrhage. Conclusions The addition of bevacizumab to paclitaxel plus carboplatin in the treatment of selected patients with non–small-cell lung cancer has a significant survival benefit with the risk of increased treatment-related deaths. (ClinicalTrials.gov number, NCT00021060.)
5,584 citations
TL;DR: A unified mixed-model approach to account for multiple levels of relatedness simultaneously as detected by random genetic markers is developed and provides a powerful complement to currently available methods for association mapping.
Abstract: As population structure can result in spurious associations, it has constrained the use of association studies in human and plant genetics. Association mapping, however, holds great promise if true signals of functional association can be separated from the vast number of false signals generated by population structure. We have developed a unified mixed-model approach to account for multiple levels of relatedness simultaneously as detected by random genetic markers. We applied this new approach to two samples: a family-based sample of 14 human families, for quantitative gene expression dissection, and a sample of 277 diverse maize inbred lines with complex familial relationships and population structure, for quantitative trait dissection. Our method demonstrates improved control of both type I and type II error rates over other methods. As this new method crosses the boundary between family-based and structured association samples, it provides a powerful complement to currently available methods for association mapping.
3,467 citations
TL;DR: The authors conducted a content analysis on new scale development articles appearing in the Journal of Counseling Psychology during 10 years (1995 to 2004) and uncovered a variety of specific practices that were at variance with the current literature on factor analysis or structural equation modeling, making recommendations for best practices in scale development research in counseling psychology using exploratory and confirmatory factor analysis.
Abstract: The authors conducted a content analysis on new scale development articles appearing in the Journal of Counseling Psychology during 10 years (1995 to 2004). The authors analyze and discuss characteristics of the exploratory and confirmatory factor analysis procedures in these scale development studies with respect to sample characteristics, factorability, extraction methods, rotation methods, item deletion or retention, factor retention, and model fit indexes. The authors uncovered a variety of specific practices that were at variance with the current literature on factor analysis or structural equation modeling. They make recommendations for best practices in scale development research in counseling psychology using exploratory and confirmatory factor analysis.
2,519 citations
TL;DR: In this paper, the authors synthesize relationship marketing empirical research in a meta-analytic framework and find that relationship investment has a large direct effect on seller objective performance, which implies that additional meditated pathways may explain the impact of relationship marketing on performance.
Abstract: Relationship marketing (RM) has emerged as one of the dominant mantras in business strategy circles, though RM investigations often yield mixed results. To help managers and researchers improve the effectiveness of their efforts, the authors synthesize RM empirical research in a meta-analytic framework. Although the fundamental premise that RM positively affects performance is well supported, many of the authors' findings have significant implications for research and practice. Relationship investment has a large direct effect on seller objective performance, which implies that additional meditated pathways may explain the impact of RM on performance. Objective performance is influenced most by relationship quality (a composite measure of relationship strength) and least by commitment. The results suggest also that RM is more effective when relationships are more critical to customers (e.g., service offerings, channel exchanges, business markets) and built with an individual person rather than a selling firm (which partially explains the mixed effects between RM and performance reported in previous studies).
2,467 citations
TL;DR: In this article, the authors synthesize relationship marketing empirical research in a meta-analytic framework and show that relationship investment has a large, direct effect on seller objective performance, which implies that additional meditated pathways may explain the impact of relationship marketing on performance.
Abstract: Relationship marketing (RM) has emerged as one of the dominant mantras in business strategy circles, though RM investigations often yield mixed results To help managers and researchers improve the effectiveness of their efforts, the authors synthesize RM empirical research in a meta-analytic framework Although the fundamental premise that RM positively affects performance is well supported, many of the authors’ findings have significant implications for research and practice Relationship investment has a large, direct effect on seller objective performance, which implies that additional meditated pathways may explain the impact of RM on performance Objective performance is influenced most by relationship quality (a composite measure of relationship strength) and least by commitment The results also suggest that RM is more effective when relationships are more critical to customers (eg, service offerings, channel exchanges, business markets) and when relationships are built with an individual person rather than a selling firm (which partially explains the mixed effects between RM and performance reported in previous studies)
2,056 citations
TL;DR: A speculative peer-socialization model is presented based on this review of sex differences in several peer relationship processes, including behavioral and social-cognitive styles, stress and coping, and relationship provisions, which suggests that sex-linked relationship processes have costs and benefits for girls' and boys' adjustment.
Abstract: Theory and research on sex differences in adjustment focus largely on parental, societal, and biological influences. However, it also is important to consider how peers contribute to girls' and boys' development. This article provides a critical review of sex differences in several peer relationship processes, including behavioral and social-cognitive styles, stress and coping, and relationship provisions. The authors present a speculative peer-socialization model based on this review in which the implications of these sex differences for girls' and boys' emotional and behavioral development are considered. Central to this model is the idea that sex-linked relationship processes have costs and benefits for girls' and boys' adjustment. Finally, the authors present recent research testing certain model components and propose approaches for testing understudied aspects of the model.
2,036 citations
TL;DR: Nanowires produced by the oxygenic phototrophic cyanobacterium Synechocystis PCC6803 and the thermophilic, fermentative bacterium Pelotomaculum thermopropionicum reveal that electrically conductive appendages are not exclusive to dissimilatory metal-reducing bacteria and may, in fact, represent a common bacterial strategy for efficient electron transfer and energy distribution.
Abstract: Shewanella oneidensis MR-1 produced electrically conductive pilus-like appendages called bacterial nanowires in direct response to electron-acceptor limitation. Mutants deficient in genes for c-type decaheme cytochromes MtrC and OmcA, and those that lacked a functional Type II secretion pathway displayed nanowires that were poorly conductive. These mutants were also deficient in their ability to reduce hydrous ferric oxide and in their ability to generate current in a microbial fuel cell. Nanowires produced by the oxygenic phototrophic cyanobacterium Synechocystis PCC6803 and the thermophilic, fermentative bacterium Pelotomaculum thermopropionicum reveal that electrically conductive appendages are not exclusive to dissimilatory metal-reducing bacteria and may, in fact, represent a common bacterial strategy for efficient electron transfer and energy distribution.
1,666 citations
Massachusetts Institute of Technology1, UNAVCO2, National Science Foundation3, Kandilli Observatory and Earthquake Research Institute4, Azerbaijan National Academy of Sciences5, King Abdulaziz City for Science and Technology6, National Technical University7, Sana'a University8, Ulster University9, Istanbul Technical University10, University of Missouri11, Lebanese American University12
TL;DR: In this article, an elastic block model was developed to constrain present-day plate motions (relative Euler vectors), regional deformation within the interplate zone, and slip rates for major faults.
Abstract: [1] The GPS-derived velocity field (1988–2005) for the zone of interaction of the Arabian, African (Nubian, Somalian), and Eurasian plates indicates counterclockwise rotation of a broad area of the Earth's surface including the Arabian plate, adjacent parts of the Zagros and central Iran, Turkey, and the Aegean/Peloponnesus relative to Eurasia at rates in the range of 20–30 mm/yr. This relatively rapid motion occurs within the framework of the slow-moving (∼5 mm/yr relative motions) Eurasian, Nubian, and Somalian plates. The circulatory pattern of motion increases in rate toward the Hellenic trench system. We develop an elastic block model to constrain present-day plate motions (relative Euler vectors), regional deformation within the interplate zone, and slip rates for major faults. Substantial areas of continental lithosphere within the region of plate interaction show coherent motion with internal deformations below ∼1–2 mm/yr, including central and eastern Anatolia (Turkey), the southwestern Aegean/Peloponnesus, the Lesser Caucasus, and Central Iran. Geodetic slip rates for major block-bounding structures are mostly comparable to geologic rates estimated for the most recent geological period (∼3–5 Myr). We find that the convergence of Arabia with Eurasia is accommodated in large part by lateral transport within the interior part of the collision zone and lithospheric shortening along the Caucasus and Zagros mountain belts around the periphery of the collision zone. In addition, we find that the principal boundary between the westerly moving Anatolian plate and Arabia (East Anatolian fault) is presently characterized by pure left-lateral strike slip with no fault-normal convergence. This implies that “extrusion” is not presently inducing westward motion of Anatolia. On the basis of the observed kinematics, we hypothesize that deformation in the Africa-Arabia-Eurasia collision zone is driven in large part by rollback of the subducting African lithosphere beneath the Hellenic and Cyprus trenches aided by slab pull on the southeastern side of the subducting Arabian plate along the Makran subduction zone. We further suggest that the separation of Arabia from Africa is a response to plate motions induced by active subduction.
1,609 citations
[...]
TL;DR: Anesthesia and Surgery Assisted Reproduction Bacterial and Mycotic Disease Behavior and Behavioral Analysis Cardiovascular Research Embryology and Teratology Euthanasia and Necropsy Experimental Modeling and Research Methodology Gerontology and Age-Associated Lesions Health Surveillance Hematology and Clinical Biochemistry Historical Foundations.
Abstract: Anesthesia and Surgery Assisted Reproduction Bacterial and Mycotic Disease Behavior and Behavioral Analysis Cardiovascular Research Embryology and Teratology Euthanasia and Necropsy Experimental Modeling and Research Methodology Gerontology and Age-Associated Lesions Gnotobiology Health Surveillance Hematology and Clinical Biochemistry Historical Foundations Housing and Environment Immunology Legal and Ethical Perspectives Medical Management and Diagnostic approaches Metabolic, Traumatic and Miscellaneous Disease Morphophysiology Neoplastic Disease Nutrition Occupational Health Parasitic Disease Reproduction and Breeding Spontaneous and Induced Mutants Taxonomy Toxicology Transgenics, Phenotyping and the Rat Genome Viral Disease Wild and Black Rats Wild and Miscellaneous "Rats"
1,361 citations
TL;DR: A meta-analysis of the social support and burnout literature finds that social support, as a resource, did not yield different relationships across the 3 burnout dimensions, challenging the COR model.
Abstract: The Conservation of Resources (COR) model of burnout (Hobfoll & Freedy, 1993) suggests that resources are differentially related to burnout dimensions. In this paper, I provide a meta-analysis of the social support and burnout literature, finding that social support, as a resource, did not yield different relationships across the 3 burnout dimensions (emotional exhaustion, depersonalization, and personal accomplishment), challenging the COR model. However, when considering the source of the social support (work vs. nonwork) as a moderator, I found that work-related sources of social support, because of their more direct relationship to work demands, were more closely associated with exhaustion than depersonalization or personal accomplishment; the opposite pattern was found with nonwork sources of support. I discuss the implications of this finding in relation to the COR model and suggest future research directions to clarify the relationship between resources and burnout dimensions.
University of Alaska Fairbanks1, Woods Hole Research Center2, University of California3, Marine Biological Laboratory4, University of Missouri5, Oregon State University6, National Center for Atmospheric Research7, Max Planck Society8, University of New Hampshire9, United States Geological Survey10, Cornell University11, Stanford University12, University of Colorado Boulder13, United States Forest Service14, Brown University15, Duke University16
TL;DR: In this article, the imbalance between gross primary production (GPP) and ecosystem respiration (ER) was defined as a measure of the amount of carbon being transferred from one ecosystem to another.
Abstract: Recent projectionsofclimatic change havefocused a great deal of scientific and public attention on patterns of carbon (C) cycling as well as its controls, particularly the factors that determine whether an ecosystem is a net source or sink of atmospheric carbon dioxide (CO2). Net ecosystem production (NEP), a central concept in C-cycling research, has been used by scientists to represent two different concepts. We propose that NEP be restricted to just one of its two original definitions—the imbalance between gross primary production (GPP) and ecosystem respiration (ER). We further propose that a new term—net ecosystem carbon balance (NECB)—be applied to the net rate of C accumulation in (or loss from [negative sign]) ecosystems. Net ecosystem carbon balance differs from NEP when C fluxesotherthanCfixationandrespiration occur,or when inorganic C enters or leaves in dissolved form. These fluxes include the leaching loss or lateral transfer of C from the ecosystem; the emission of volatile organic C, methane, and carbon monoxide; and the release of soot and CO2 from fire. Carbon fluxes in addition to NEP are particularly important determinants of NECB over long time scales. However, even over short time scales, they are important in ecosystems such as streams, estuaries, wetlands, and cities. Recent technological advances have led to a diversity of approaches to the measurement of C fluxes at different temporal and spatial scales. These approaches frequently capture different components of NEP or NECB and can therefore be compared across scales only by carefully specifying the
TL;DR: Concern with human exposure to BPA derives from identification of molecular mechanisms mediating effects in human and animal tissues at very low doses, in vivo effects in experimental animals caused by low doses within the range of human exposure, and widespread human Exposure to levels of BPA that cause adverse effects in animals.
Abstract: Over 6 billion pounds per year of the estrogenic monomer bisphenol A (BPA) are used to manufacture polycarbonate plastic products, in resins lining metal cans, in dental sealants, and in blends with other types of plastic products. The ester bond linking BPA molecules in polycarbonate and resins undergoes hydrolysis, resulting in the release of free BPA into food, beverages, and the environment, and numerous monitoring studies now show almost ubiquitous human exposure to biologically active levels of this chemical. BPA exerts estrogenic effects through the classical nuclear estrogen receptors, and BPA acts as a selective estrogen receptor modulator. However, BPA also initiates rapid responses via estrogen receptors presumably associated with the plasma membrane. Similar to estradiol, BPA causes changes in some cell functions at concentrations between 1 pM and 1 nM, and the mean and median range of unconjugated BPA measured by multiple techniques in human pregnant maternal, fetal, and adult blood and other tissues exceeds these levels. In contrast to these published findings, BPA manufacturers persist in describing BPA as a weak estrogen and insist there is little concern with human exposure levels. Our concern with human exposure to BPA derives from 1) identification of molecular mechanisms mediating effects in human and animal tissues at very low doses, 2) in vivo effects in experimental animals caused by low doses within the range of human exposure, and 3) widespread human exposure to levels of BPA that cause adverse effects in animals.
TL;DR: Results indicate that positive moods may predispose individuals to feel that life is meaningful and increase sensitivity to the meaning-relevance of a situation.
Abstract: Six studies examined the role of positive affect (PA) in the experience of meaning in life (MIL). Study 1 showed strong relations between measures of mood, goal appraisals, and MIL. In multivariate analyses, PA was a stronger predictor of MIL than goal appraisals. In Study 2, the most consistent predictor of the experience of meaning in a day was the PA experienced that day. Later, global MIL was predicted by average daily PA, rather than average daily MIL. Study 3 demonstrated no prospective relations between measures of MIL and PA over 2 years. In Study 4, priming positive mood concepts enhanced MIL. In Study 5, manipulated positive mood enhanced ratings of MIL for those who were not given an attributional cue for their moods. In Study 6, PA was associated with a high level of distinction between meaningful and meaningless activities. Results indicate that positive moods may predispose individuals to feel that life is meaningful. In addition, positive moods may increase sensitivity to the meaning-relevance of a situation.
TL;DR: There has been little or no change for infant regurgitation, infant rumination syndrome, or infant dyschezia, and data-driven changes in diagnostic criteria for functional constipation appear to be less rigid and more inclusive than previous criteria.
TL;DR: Seven methodologically diverse studies addressed 3 fundamental questions about nostalgia and established that nostalgia bolsters social bonds, increases positive self-regard, and generates positive affect.
Abstract: Seven methodologically diverse studies addressed 3 fundamental questions about nostalgia. Studies 1 and 2 examined the content of nostalgic experiences. Descriptions of nostalgic experiences typically featured the self as a protagonist in interactions with close others (e.g., friends) or in momentous events (e.g., weddings). Also, the descriptions contained more expressions of positive than negative affect and often depicted the redemption of negative life scenes by subsequent triumphs. Studies 3 and 4 examined triggers of nostalgia and revealed that nostalgia occurs in response to negative mood and the discrete affective state of loneliness. Studies 5, 6, and 7 investigated the functional utility of nostalgia and established that nostalgia bolsters social bonds, increases positive self-regard, and generates positive affect. These findings demarcate key landmarks in the hitherto uncharted research domain of nostalgia.
TL;DR: In this paper, a step-by-step guide for performing bootstrap mediation analyses is provided, and the test of joint significance is also briefly described as an alternative to both the normal theory and bootstrap methods.
Abstract: P. A. Frazier, A. P. Tix, and K. E. Barron (2004) highlighted a normal theory method popularized by R. M. Baron and D. A. Kenny (1986) for testing the statistical significance of indirect effects (i.e., mediator variables) in multiple regression contexts. However, simulation studies suggest that this method lacks statistical power relative to some other approaches. The authors describe an alternative developed by P. E. Shrout and N. Bolger (2002) based on bootstrap resampling methods. An example and step-by-step guide for performing bootstrap mediation analyses are provided. The test of joint significance is also briefly described as an alternative to both the normal theory and bootstrap methods. The relative advantages and disadvantages of each approach in terms of precision in estimating confidence intervals of indirect effects, Type I error, and Type II error are discussed.
TL;DR: Lyubomirsky et al. as discussed by the authors examined the motivational predictors and positive emotion outcomes of regularly practicing two mental exercises: counting one's blessings (gratitude) and visualizing best possible self (BPS).
Abstract: A 4-week experimental study (N = 67) examined the motivational predictors and positive emotion outcomes of regularly practicing two mental exercises: counting one's blessings (“gratitude”) and visualizing best possible selves (“BPS”). In a control exercise, participants attended to the details of their day. Undergraduates performed one of the three exercises during Session I and were asked to continue performing it at home until Session II (in 2 weeks) and again until Session III (in a further 2 weeks). Following previous theory and research, the practices of gratitude and BPS were expected to boost immediate positive affect, relative to the control condition. In addition, we hypothesized that continuing effortful performance of these exercises would be necessary to maintain the boosts (Lyubomirsky, S., Sheldon, K. M., & Schkade, D. (2005a). Pursuing happiness: The architecture of sustainable change. Review of General Psychology, 9, 111–131). Finally, initial self-concordant motivation to perform the exer...
TL;DR: This paper synthesizes the results, methodology, and research conducted concerning the K-means clustering method over the last fifty years, leading to a unifying treatment of K-Means and some of its extensions.
Abstract: This paper synthesizes the results, methodology, and research conducted concerning the K-means clustering method over the last fifty years. The K-means method is first introduced, various formulations of the minimum variance loss function and alternative loss functions within the same class are outlined, and different methods of choosing the number of clusters and initialization, variable preprocessing, and data reduction schemes are discussed. Theoretic statistical results are provided and various extensions of K-means using different metrics or modifications of the original algorithm are given, leading to a unifying treatment of K-means and some of its extensions. Finally, several future studies are outlined that could enhance the understanding of numerous subtleties affecting the performance of the K-means method.
TL;DR: Recent advances in organ printing technology for applications relating to medical interventions and organ replacement are described and an exciting advance pioneered in the laboratory is that of simultaneous printing of Cells and biomaterials, which allows precise placement of cells and proteins within 3‐D hydrogel structures.
Abstract: Recent advances in organ printing technology for applications relating to medical interventions and organ replacement are described. Organ printing refers to the placement of various cell types into a soft scaffold fabricated according to a computer-aided design template using a single device. Computer aided scaffold topology design has recently gained attention as a viable option to achieve function and mass transport requirements within tissue engineering scaffolds. An exciting advance pioneered in our laboratory is that of simultaneous printing of cells and biomaterials, which allows precise placement of cells and proteins within 3-D hydrogel structures. This advance raises the possibility of spatially controlling not only the scaffold structure, but also the type of tissue that can be grown within the scaffold and the thickness of the tissue as capillaries and vessels could be constructed within the scaffolds. Here we summarize recent advances in printing cells and materials using the same device.
University of Georgia1, Pennington Biomedical Research Center2, University of Missouri3, University of California, Irvine4, University of California, Los Angeles5, University of Colorado Boulder6, Neuroscience Research Australia7, University of Illinois at Urbana–Champaign8, Rutgers University9, Johns Hopkins University10, California State University, Los Angeles11, University of Connecticut12, University of Portland13, University of Pittsburgh14
TL;DR: Mechanisms explaining these adaptations are not as yet known, but metabolic and neurochemical pathways among skeletal muscle, the spinal cord, and the brain offer plausible, testable mechanisms that might help explain effects of physical activity and exercise on the central nervous system.
Abstract: Voluntary physical activity and exercise training can favorably influence brain plasticity by facilitating neurogenerative, neuroadaptive, and neuroprotective processes. At least some of the processes are mediated by neurotrophic factors. Motor skill training and regular exercise enhance executive functions of cognition and some types of learning, including motor learning in the spinal cord. These adaptations in the central nervous system have implications for the prevention and treatment of obesity, cancer, depression, the decline in cognition associated with aging, and neurological disorders such as Parkinson's disease, Alzheimer's dementia, ischemic stroke, and head and spinal cord injury. Chronic voluntary physical activity also attenuates neural responses to stress in brain circuits responsible for regulating peripheral sympathetic activity, suggesting constraint on sympathetic responses to stress that could plausibly contribute to reductions in clinical disorders such as hypertension, heart failure, oxidative stress, and suppression of immunity. Mechanisms explaining these adaptations are not as yet known, but metabolic and neurochemical pathways among skeletal muscle, the spinal cord, and the brain offer plausible, testable mechanisms that might help explain effects of physical activity and exercise on the central nervous system.
TL;DR: Better understanding of the specific roles of various metabolites in crop stress tolerance will give rise to a strategy for the metabolic engineering of crop tolerance of drought.
TL;DR: In this paper, the suction stress characteristic curve (SSCC) for unsaturated soil is presented, and the experimental evidence shows that both Mohr-Coulomb failure and critical state failure can be well represented by the SSCC concept.
Abstract: The concept of the suction stress characteristic curve (SSCC) for unsaturated soil is presented. Particle-scale equilibrium analyses are employed to distinguish three types of interparticle forces: (1) active forces transmitted through the soil grains; (2) active forces at or near interparticle contacts; and (3) passive, or counterbalancing, forces at or near interparticle contacts. It is proposed that the second type of force, which includes physicochemical forces, cementation forces, surface tension forces, and the force arising from negative pore-water pressure, may be conceptually combined into a macroscopic stress called suction stress. Suction stress characteristically depends on degree of saturation, water content, or matric suction through the SSCC, thus paralleling well-established concepts of the soil–water characteristic curve and hydraulic conductivity function for unsaturated soils. The existence and behavior of the SSCC are experimentally validated by considering unsaturated shear strength data for a variety of soil types in the literature. Its characteristic nature and a methodology for its determination are demonstrated. The experimental evidence shows that both Mohr–Coulomb failure and critical state failure can be well represented by the SSCC concept. The SSCC provides a potentially simple and practical way to describe the state of stress in unsaturated soil.
TL;DR: Workplace problems are ill-structured and complex because they possess conflicting goals, multiple solution methods, non-engineering success standards, nonengineering constraints, unanticipated problems, distributed knowledge, collaborative activity systems, importance of experience, and multiple forms of problem representation as discussed by the authors.
Abstract: Practicing engineers are hired, retained, and rewarded for solving problems, so engineering students should learn how to solve workplace problems Workplace engineering problems are substantively different from the kinds of problems that engineering students most often solve in the classroom; therefore, learning to solve classroom problems does not necessarily prepare engineering students to solve workplace problems These qualitative studies of workplace engineering problems identify the attributes of workplace problems Workplace problems are ill-structured and complex because they possess conflicting goals, multiple solution methods, non-engineering success standards, non-engineering constraints, unanticipated problems, distributed knowledge, collaborative activity systems, the importance of experience, and multiple forms of problem representation Some implications for designing engineering curricula and experiences that better prepare students for solving workplace problems are considered
TL;DR: In this paper, the authors show that the positive relation between institutional ownership and future stock returns documented in Gompers and Metrick (2001) is driven by short-term institutions.
Abstract: We show that the positive relation between institutional ownership and future stock returns documented in Gompers and Metrick (2001) is driven by short-term institutions. Furthermore, short-term institutions' trading forecasts future stock returns. This predictability does not reverse in the long run and is stronger for small and growth stocks. Short-term institutions' trading is also positively related to future earnings surprises. By contrast, long-term institutions' trading does not forecasts future returns, nor is it related to future earnings news. Our results are consistent with the view that short-term institutions are better informed and they trade actively to exploit their informational advantage.
TL;DR: In this paper, the authors construct new classes of Parseval frames for a Hilbert space which allow signal reconstruction from the absolute value of the frame coefficients without using phase or its estimation.
TL;DR: It is argued that the use of parental control in Latino families may have motivational roots in cultural childrearing goals such as familismo, respeto, and educación (moral education), and consideration of these underpinnings helps to explain variability in theUse of Latino parental control and its effect on child development.
Abstract: Using social information processing and cultural change models as explanatory frameworks, this article reviews the literature on Latino parental control and its implications for child development. It is argued that the use of parental control in Latino families may have motivational roots in cultural childrearing goals such as familismo (familism), respeto (respect), and educacion (moral education). Consideration of these underpinnings, in conjunction with psychological and methodological issues, helps to explain variability in the use of Latino parental control and its effect on child development. Recommendations for future research include refinement of control and acculturation instruments, and attention to both contextual and individual variables.
TL;DR: The authors conducted a comprehensive review to understand the relation between personality and aggressive behavior, under provoking and nonprovoking conditions and revealed that some personality variables influenced aggressive behavior under both neutral and provocation conditions, whereas others influencedaggressive behavior only under provocation.
Abstract: The authors conducted a comprehensive review to understand the relation between personality and aggressive behavior, under provoking and nonprovoking conditions. The qualitative review revealed that some personality variables influenced aggressive behavior under both neutral and provocation conditions, whereas others influenced aggressive behavior only under provocation. Studies that assessed personality variables and that directly measured aggressive behavior were included in the quantitative review. Analyses revealed that trait aggressiveness and trait irritability influenced aggressive behavior under both provoking and neutral conditions but that other personality variables (e.g., trait anger, Type A personality, dissipation-rumination) influenced aggressive behavior only under provoking conditions. The authors discuss possible relations between these patterns of aggressive behavior and the personality dimensions of Agreeableness and Neuroticism and consider implications for theories of aggression.
TL;DR: A meta-analysis of 32 randomized trials that directly compared EBTs with usual care found E BTs outperformed usual care, and can inform the search for the most effective interventions and guide treatment selection in clinical care.
Abstract: In the debate over evidence-based treatments (EBTs) for youth, one question is central: Do EBTs produce better outcomes than the usual interventions employed in clinical care? The authors addressed this question through a meta-analysis of 32 randomized trials that directly compared EBTs with usual care. EBTs outperformed usual care. Effects fell within the small to medium range at posttreatment, increasing somewhat at follow-up. EBT superiority was not reduced by high levels of youth severity or by inclusion of minority youths. The findings underscore a need for improved study designs and detailed treatment descriptions. In the future, the EBT versus usual care genre can inform the search for the most effective interventions and guide treatment selection in clinical care.
TL;DR: Longer TT and higher Kt/V were independently as well as synergistically associated with lower mortality, and a randomized clinical trial of longer dialysis sessions in thrice-weekly HD is warranted.