878 research outputs found

    Divinity, Noēsis, and Aristotelian Friendship

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    Aristotle's NE X claim that the best human life is one devoted to contemplation (theoria) seems in tension with his emphasis elsewhere on our essentially political nature, and more specifically, his claim that friendship is necessary for our flourishing. For, if our good can be in principle realized apart from the human community, there seems little reason to suggest we 'need' friends, as he clearly does in NE VIII & IX. I argue that central to Aristotle's NE X discussion of contemplation is the claim that our chief good accords with whatever is 'most divine' in us, viz. our rational nature (NE 1177b2-18). Thus, the best human life involves the excellent exercise of our rational capacities. I distinguish two ways in which human beings flourish through exercising their rationality. The first is in the activity of theoria. The second, I argue, can be found in the virtuous activity of complete friendship (teleia philia). For Aristotle the truest form of friendship is an expression of rationality. It is characterized not merely by our living together, but conversing, and sharing one another's thoughts (NE 1170b12-14). Examining Aristotle's notion of a friend as 'another self (alios autos), I argue that through friendship human beings come to better know themselves and the world in which they live. Complete friendship involves a (uniquely human) second-order awareness of oneself in another, and through this awareness our understanding of ourselves and the world in which we live is enriched, confirmed, and enjoyed through the presence of other minds. Thus, the highest form of Aristotelian friendship is an intellectual activity through which we attain an analogue of the divine contemplation of the unmoved mover, thereby living with respect to what is most divine in us, but doing so in accordance with our uniquely rational-political nature

    The compositional and metabolic responses of gilthead seabream (Sparus aurata) to a gradient of dietary fish oil and associated n-3 long-chain PUFA content

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    The authors express their gratitude to the technical team at the BioMar Feed Trial Unit, Hirtshals, in particular, Svend Jþrgen Steenfeldt for expert care of the experimental subjects, for training and supervision provided by laboratory staff at Nutrition Analytical Services and Molecular Biology at the Institute of Aquaculture, University of Stirling, UK. S. J. S. H’s. PhD was co-funded by BioMar and the Marine Alliance for Science and Technology Scotland. BioMar provided the experimental feeds, trial facilities and fish, and covered travel expenses. V. K. and J. T. designed and executed the nutritional trial and all authors contributed to planning the analyses. V. K., J. T. and S. J. S. H. carried out the sampling. O. M., D. R. T and S. A. M. M. supervised the lead author. M. B. B. provided training in molecular biology to S. J. S. H. who carried out all analytical procedures. S. J. S. H. analysed all of the data and prepared the manuscript. Subsequently the manuscript was shared between all authors who made amendments, contributions and recommendations. The authors declare that there are no conflicts of interestPeer reviewedPublisher PD

    Evolution of trust and trustworthiness: social awareness favours personality differences

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    Interest in the evolution and maintenance of personality is burgeoning. Individuals of diverse animal species differ in their aggressiveness, fearfulness, sociability and activity. Strong trade-offs, mutation–selection balance, spatio-temporal fluctuations in selection, frequency dependence and good-genes mate choice are invoked to explain heritable personality variation, yet for continuous behavioural traits, it remains unclear which selective force is likely to maintain distinct polymorphisms. Using a model of trust and cooperation, we show how allowing individuals to monitor each other's cooperative tendencies, at a cost, can select for heritable polymorphisms in trustworthiness. This variation, in turn, favours costly ‘social awareness’ in some individuals. Feedback of this sort can explain the individual differences in trust and trustworthiness so often documented by economists in experimental public goods games across a range of cultures. Our work adds to growing evidence that evolutionary game theorists can no longer afford to ignore the importance of real world inter-individual variation in their models

    The Prosocial and Aggressive Driving Inventory (PADI): A Self-Report Measure of Safe and Unsafe Driving Behaviors

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    Surveys of 1217 undergraduate students supported the reliability (inter-item and test-retest) and validity of the Prosocial and Aggressive Driving Inventory (PADI). Principal component analyses on the PADI items yielded two scales: Prosocial Driving (17 items) and Aggressive Driving (12 items). Prosocial Driving was associated with fewer reported traffic accidents and violations, with participants who were older and female, and with lower Boredom Susceptibility and Hostility scores, and higher scores on Agreeableness, Conscientiousness, Openness, and Neuroticism. Aggressive Driving was associated with more frequent traffic violations, with female participants, and with higher scores on Competitiveness, Sensation Seeking, Hostility, and Extraversion, and lower scores on Conscientiousness, Agreeableness, and Openness. The theoretical and practical implications of the PADI’s dual focus on safe and unsafe driving are discussed

    Methodology Of Open Bladed Impeller Resonance Indentification.

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    LecturePg. 61-68Open bladed impellers (impellers without shrouds) with high rotational speeds are a vital component of centrifugal compressors. The impeller reliability is directly related to the compressors’ successful operation and environmental safety. Assuming that the impeller is designed within the mechanical limits of its construction material, one of the most common causes of impeller failure is fatigue. There are primarily two types of fatigue failures: blade failures and disk failures. Metallurgical inspection of failed impellers can be used to identify fatigue as the root cause. It is imperative, however, that rigorous engineering analysis is applied in the initial design phase to prevent resonance that will result in impeller failures. To meet the objective of designing reliable and trouble-free impellers, blade and disk modal analyses are of the utmost importance. Development of a Campbell diagram is a typical means of identifying potential harmonic frequencies. The blade frequencies and disk frequencies overlap each other on the Campbell diagram because of the complex blade geometry and influence of disk flexibility. This makes it difficult to identify the possible resonance. This paper describes a practical method, which combines 3-D finite element modal analysis, Campbell diagram, Singh’s advanced frequency evaluation (SAFE) diagram, and the authors’ experience in an effort to prevent excitation of undesirable natural frequencies. Presented within the paper are particular modal analysis steps, which include: ‱ Techniques to identify possible disk resonance ‱ Techniques to identify possible blade and bladed disk resonance ‱ Techniques to improve the design The method has been successfully used in centrifugal compressor impeller design process and failure cause analyses. A case study in which these methods are applied is given as an example

    It takes three to tango: The length of the oligothiophene chain determines the nature of the long‐lived excited state and the resulting photocytotoxicity of a ruthenium(II) Photodrug

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    Abstract TLD1433 is the first Ru(II) complex to be tested as a photodynamic therapy agent in a clinical trial. In this contribution we study TLD1433 in the context of structurally‐related Ru(II)‐imidozo[4,5‐f][1,10]phenanthroline (ip) complexes appended with thiophene rings to decipher the unique photophysical properties which are associated with increasing oligothiophene chain length. Substitution of the ip ligand with ter‐ or quaterthiophene changes the nature of the long‐lived triplet state from metal‐to‐ligand charge‐transfer to 3 ππ* character. The addition of the third thiophene thus presents a critical juncture which not only determines the photophysics of the complex but most importantly its capacity for 1 O 2 generation and hence the potential of the complex to be used as a photocytotoxic agent

    Climate oscillations, glacial refugia, and dispersal ability: factors influencing the genetic structure of the least salmonfly, Pteronarcella badia (Plecoptera), in Western North America

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    Background: Phylogeographic studies of aquatic insects provide valuable insights into mechanisms that shape the genetic structure of communities, yet studies that include broad geographic areas are uncommon for this group. We conducted a broad scale phylogeographic analysis of the least salmonfly Pteronarcella badia (Plecoptera) across western North America. We tested hypotheses related to mode of dispersal and the influence of historic climate oscillations on population genetic structure. In order to generate a larger mitochondrial data set, we used 454 sequencing to reconstruct the complete mitochondrial genome in the early stages of the project. Results: Our analysis revealed high levels of population structure with several deeply divergent clades present across the sample area. Evidence from five mitochondrial genes and one nuclear locus identified a potentially cryptic lineage in the Pacific Northwest. Gene flow estimates and geographic clade distributions suggest that overland flight during the winged adult stage is an important dispersal mechanism for this taxon. We found evidence of multiple glacial refugia across the species distribution and signs of secondary contact within and among major clades. Conclusions: This study provides a basis for future studies of aquatic insect phylogeography at the inter-basin scale in western North America. Our findings add to an understanding of the role of historical climate isolations in shaping assemblages of aquatic insects in this region. We identified several geographic areas that may have historical importance for other aquatic organisms with similar distributions and dispersal strategies as P. badia. This work adds to the ever-growing list of studies that highlight the potential of next-generation DNA sequencing in a phylogenetic context to improve molecular data sets from understudied groups

    Symptoms predicting remission after divalproex augmentation with olanzapine in partially nonresponsive patients experiencing mixed bipolar I episode: a post-hoc analysis of a randomized controlled study

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    <p>Abstract</p> <p>Background</p> <p>Rating scale items in a 6-week clinical trial of olanzapine versus placebo augmentation in patients with mixed bipolar disorder partially nonresponsive to ≄14 days of divalproex monotherapy were analyzed to characterize symptom patterns that could predict remission. At baseline, the two treatment groups were similar.</p> <p>Findings</p> <p>Factor analysis with Varimax rotation was performed <it>post hoc </it>on baseline items of the 21-Item Hamilton Depression Rating Scale (HDRS-21) and Young Mania Rating Scale (YMRS). Backwards-elimination logistic regression ascertained factors predictive of protocol-defined endpoint remission (HDRS-21 score ≀ 8 and YMRS score ≀ 12) with subsequent determination of optimally predictive factor score cutoffs.</p> <p>Factors for Psychomotor activity (YMRS items for elevated mood, increased motor activity, and increased speech and HDRS-21 agitation item) and Guilt/Suicidality (HDRS-21 items for guilt and suicidality) significantly predicted endpoint remission in the divalproex+olanzapine group. No factor predicted remission in the divalproex+placebo group. Patients in the divalproex+olanzapine group with high pre-augmentation psychomotor activity (scores ≄10) were more likely to remit compared to those with lower psychomotor activity (odds ratio [OR] = 3.09, 95% confidence interval [CI] = 1.22-7.79), and patients with marginally high Guilt/Suicidality (scores ≄2) were less likely to remit than those with lower scores (OR = 0.37, 95% CI = 0.13-1.03). Remission rates for divalproex+placebo vs. divalproex+olanzapine patients with high psychomotor activity scores were 22% vs. 45% (p = 0.08) and 33% vs. 48% (p = 0.29) for patients with low Guilt/Suicidality scores.</p> <p>Conclusions</p> <p>Patients who were partially nonresponsive to divalproex treatment with remaining high vs. low psychomotor activity levels or minimal vs. greater guilt/suicidality symptoms were more likely to remit with olanzapine augmentation.</p> <p>Trial Registration</p> <p>ClinicalTrials.gov; <url>http://clinicaltrials.gov/ct2/show/NCT00402324?term=NCT00402324&rank=1</url>, Identifier: NCT00402324</p

    Marketing Livestock at Union Stockyards San Antonio.

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