A major distinction in the social organization of ant societies is the number of reproductive queens that reside in a single colony. The fire ant Solenopsis invicta exists in two distinct social forms, one with colonies headed by a single reproductive queen and the other containing several to hundreds of egg‐laying queens. This variation in social organization has been shown to be associated with genotypes at the gene Gp‐9. Specifically, single‐queen colonies have only the B allelic variant of this gene, (...) whereas multiple‐queen colonies always have the b variant as well. Subsequent studies revealed that Gp‐9 shares the highest sequence similarity with genes encoding pheromone‐binding proteins (PBPs). In other insects, PBPs serve as central molecular components in the process of chemical recognition of conspecifics. Fire ant workers regulate the number of egg‐laying queens in a colony by accepting queens that produce appropriate chemical signals and destroying those that do not. The likely role of GP‐9 in chemoreception suggests that the essential distinction in colony queen number between the single and multiple‐queen form originates from differences in workers' abilities to recognize queens. Other, closely related fire ant species seem to regulate colony social organization in a similar fashion. BioEssays 27:91–99, 2005. © 2004 Wiley Periodicals, Inc. (shrink)

Michael Allen's latest work on the profoundly influential Florentine thinker of the fifteenth century, Marsilio Ficino, will be welcomed by philosophers, literary scholars, and historians of the Renaissance, as well as by classicists. Ficino was responsible for inaugurating, shaping, and disseminating the wide-ranging philosophico-cultural movement known as Renaissance Platonism, and his views on the _Sophist_, which he saw as Plato's preeminent ontological dialogue, are of signal interest. This dialogue also served Ficino as a vehicle for exploring a number of (...) other humanist, philosophical, and magical preoccupations, including the theme of man the artist and creator. (shrink)

This volume consists of 21 essays on Marsilio Ficino (1433-99), the Florentine scholar-philosopher-magus-priest who was the architect of Renaissance Platonism.

Marsilio Ficino (1433-1499) was one of the luminaries of the Florentine Renaissance and the scholar responsible for the revival of Platonism. The translator and interpreter of the works of both Plato and Plotinus as well as of various Hermetic and Neoplatonic texts, Ficino was also a musician, priest, magus and psychotherapist, an original philosopher and the author of a vast and important correspondence with the intellectual figures of his day including Lorenzo the Magnificent. Professor Allen has become the foremost interpreter (...) of Ficino's metaphysics and mythology, and the ancient sources they draw upon; and this collection of essays assembles his work on Ficino's complex interrogation of Platonic 'theology' as not only a preparation for Christianity but as an enduring medium for intellectuals to explore and to express Christian truths. (shrink)

Fifteen of these essays by one of the leading authorities on Renaissance Platonism explore the complex philosophical, hermeneutical, and mythological issues addressed by the Florentine, Marsilio Ficino (1433-99). Ficino was the pre-eminent Platonist of his time and a distinguished philosopher, scholar and magus who had an enormous influence on the intellectual and cultural life of two and a half centuries, and who is one of the most important witnesses to the preoccupations of his age, above all to its fascination with (...) ancient poetry and philosophy and their uneasy accommodation as an ancient "theology" with Christianity. Two further essays treat of cognate themes taken up by Ficino's younger friend and rival, the dazzling prince of Concordia, Giovanni Pico della Mirandola (1463-94), who was fascinated by Platonism in his youth but also by other philosophical legacies from the past, including Cabala and the Scholastic Aristotelianism of the Middle Ages. This volume's initial essay serves as an introduction to the comprehensive phenomenon of Renaissance Platonism. (shrink)

Both fairness and efficiency are important considerations in market design and regulation, yet many regulators have neither defined nor measured these concepts. We develop an evidencebased policy framework in which these are both defined and measured using a series of empirical proxies. We then build a systems estimation model to examine the 2003–2011 explosive growth in algorithmic trading on the London Stock Exchange and NYSE Euronext Paris. Our results show that greater AT is associated with increased transactional efficiency and reduced (...) information leakage in top quintile stocks. For less liquid stocks, manipulation at the close declines. We also document the tradeoff between reduced spreads and increased manipulation or information leakage following the introduction of MiFID1. (shrink)

Corporate Reputation (CR) has become an increasingly important topic in the social responsibility literature. In this exploratory study we relate reputation to crisis management by implementing an experimental survey in which respondents indicate how strongly they feel about a potential crisis. Findings reported here indicate that respondents’ reactions to the potential crisis varied according to the industry in which the firm operated.

We develop a framework for assessing security market quality, relating five elements of market design to three metrics of market integrity and two metrics of market efficiency. We empirically implement this integrity–efficiency MQ framework by testing a hypothesis that trade-based ramping manipulation at the close raises execution costs on 24 security markets worldwide. Estimating a simultaneous equations model of ramping incidence, spreads, and the probability of deploying real-time surveillance, we show that quoted bid-ask spreads are positively related to the incidence (...) of MTC across seven liquidity deciles. The magnitude is economically significant; improving market integrity by cutting MTC in half reduces spreads 6–11 %. Allowing direct market access in conjunction with RTS, conducting auctions at the close, and developing regulations that require surveillance, all reduce MTC and thereby lower spreads, assuring better market integrity and enhancing market efficiency. Introducing circuit breakers or prohibiting shorts poses integrity–efficiency tradeoffs. (shrink)

New pedagogical visions and technological developments have brought argumentation to the fore of educational practice. Whereas students previously 'learned to 'argue', they now 'argue to learn': collaborative argumentation-based learning has become a popular and valuable pedagogical technique, across a variety of tasks and disciplines. Researchers have explored the conditions under which arguing to learn is successful, have described some of its learning potentials and have developed Internet-based tools to support such learning. However, the further advancement of this field presently faces (...) several problems, which the present book addresses. Three dimensions of analysis - historical, theoretical and empirical - are integrated throughout the book. Given the nature of its object of study - dialogue, interaction, argumentation, learning and teaching - the book is resolutely multidisciplinary, drawing on research on learning in educational and psychological sciences, as well as on philosophical and linguistic theories of dialogue and argumentation. (shrink)

During meiosis, homologous chromosomes must pair in order to permit recombination and correct chromosome segregation to occur. Two recent papers1,2 show that meiotic pairing is also important for correct gene expression during meiosis. They describe data for the filamentous fungus Neurospora crassa that show that a lack of pairing generated by ectopic integration of genes can result in silencing of genes expressed during meiosis. This can result in aberrant meioses whose defects are specific to the function of the unpaired gene. (...) Furthermore, mutations affecting the silencing mechanism have been selected in a gene encoding a putative RNA‐dependent RNA polymerase. This finding indicates the involvement of a meiotic specific post‐transcriptional gene silencing mechanism (PTGS) similar to that observed in vegetative cells in N. crassa and other organisms. Finally, this gene product is essential for normal meiosis, suggesting that RNA‐dependent processes are fundamental to the sexual cycle. BioEssays 25:99–103, 2003. © 2003 Wiley Periodicals, Inc. (shrink)

The World Health Assembly has encouraged WHO member-states to establish capacity in health technology assessment (HTA) as a support for achieving universal health coverage (UHC). Simultaneously, the WHO has stated that UHC is “a practical expression of the concern for health equity and the right to health.” This has prompted questions about potential tensions between priority-setting efforts and the right to health on the road to UHC. South Africa (SA) is an ideal setting in which to explore how the priority-setting (...) work of an HTA body may be integrated with an existing rights framework. (shrink)

We report here on recent developments in Israel on the issue of sex selection for nonmedical reasons by preimplantation genetic diagnosis. Sex selection for medical reasons is generally viewed as uncontroversial and legal in European and American law. Its use for nonmedical reasons is generally illegal in European countries. In the United States, it is not illegal, although in the opinion of the Ethics Committee of the American Society for Reproductive Medicine, it is problematic. This position is undergoing reconsideration, albeit (...) in a limited way. (shrink)

As organizations place greater emphasis on environmental objectives, business educators must produce the next set of leaders who can champion corporate environmental sustainability initiatives. However, environmental sustainability represents a polarizing topic with some students dismissing its importance and legitimacy. Limited research exists to understand student behavioral influences on sustainability education, especially as it translates to environmental sustainability behavior in the workplace. This gap challenges our ability as educators to understand how to best teach environmental sustainability in order to reach diverse (...) student mindsets. We apply the theory of planned behavior (TPB) to address this gap, investigating the influence of student attitudes, subjective norm, and perceived behavioral control on environmental sustainability intention and behavior. A structural model tested with student survey data finds that student attitude represents the strongest influence on environmental sustainability intention. The model also validates that subjective norm affects sustainability intention with students considering professors along with business leaders and politicians as valid references for sustainability knowledge. To tie the results to effective educational interventions, we use the TPB to organize an extensive review of the sustainability pedagogy literature and identify specific teaching recommendations for increasing the effectiveness of environmental sustainability education. (shrink)

Negotiation between two individuals is a common task that typically involves two goals: maximize individual outcomes and obtain an agreement. However, research on the simplest negotiation tasks demonstrates that although naive subjects can be induced to improve their performance, they are often no more likely to achieve fully optimal solutions. The present study tested the prediction that a decrease in a particular type of argumentative behavior, substantiation, would result in an increase in optimal agreements. As substantiation behaviors depend primarily on (...) supplied content of the negotiation task, it was also predicted that substantiation behavior would be reduced by curtailing the content. A 2 × 2 experimental design was employed, where both negotiation tactics (list of tactics present versus absent) and negotiation task content (high versus low) were varied to determine the processes leading beyond solution improvement to solution optimality. Sixty‐one dyads engaged in a two‐party, four‐issue negotiation task. All negotiations were videotaped and analyzed. Although the list of negotiation tactics resulted in improved performance, only the content manipulation resulted in a significant increase in dyads achieving optimal solutions. Analyses of the coded protocols indicated that the key difference in achieving optimality was a reduction in persistent substantiation‐related operators (substantiation, along with single‐issue preferences and procedures) and an increase in a complex macro‐operator, multi‐issue offers that reduced the problem space, facilitating the search for optimality. (shrink)

ABSTRACT There is limited guidance about whether and how to provide psychological assessment results to research participants. This paper considers several ethical challenges associated with offering individual research results in psychological assessment research. Additionally, the process used to return individual results within a study examining neurodevelopmental effects of anesthesia exposure in children and adolescents is described. Almost all participants requested to know if results were concerning; however, only around a third of those with concerning findings sought additional feedback. Ongoing research (...) and guidance are necessary to establish evidence-based practices and manage challenges that may emerge when disclosing such results. (shrink)

Some of the most imaginative analyses in contemporary science have been fostered by the paradox of irreversibility. Rendered as a question the paradox reads: How can the anisotropic macrophysical behavior of a system of molecules be reconciled with the underlying reversible molecular model? Attempts to resolve and dissolve the paradox have appealed to large numbers of particles, jammed correlations, unseen perturbations, hidden variables or constraints, uncertainty principles, averaging procedures (e.g., coarse graining and time smoothing), stochastic flaws, cosmological origins, etc. While (...) acknowledging these efforts as important articulations of basic ideas of statistical mechanics, we question their relevance to irreversibility as it occurs in nature. It seems to us that once the emergence of the phenomenon of equilibrium is understood in terms of molecular dynamics, the macroscopic appearance of irreversibility can also be understood in terms of the frequency of forced withdrawals from young equilibria. We believe that the paradox of irreversibility can be resolved in a simple, logically clear, and aesthetically pleasing manner. (shrink)

This book is a collection of secondary essays on America's most important philosophic thinkers—statesmen, judges, writers, educators, and activists—from the colonial period to the present. Each essay is a comprehensive introduction to the thought of a noted American on the fundamental meaning of the American regime.

Previous meta-analyses support a female advantage in decoding non-verbal emotion (Hall, 1978, 1984), yet the mechanisms underlying this advantage are not understood. The present study examined whether the female advantage is related to greater female attention to the eyes. Eye-tracking techniques were used to measure attention to the eyes in 19 males and 20 females during a facial expression recognition task. Women were faster and more accurate in their expression recognition compared with men, and women looked more at the eyes (...) than men. Positive relationships were observed between dwell time and number of fixations to the eyes and both accuracy of facial expression recognition and speed of facial expression recognition. These results support the hypothesis that the female advantage in facial expression recognition is related to greater female attention to the eyes. (shrink)

Harsh blame can be socially destructive. This article examines how harsh blame can be “civilized.” A core construct here is the historicist narrative, which is a story-like account of how a person came to be the sort of person she is. We argue that historicist narratives regarding immoral actors can temper blame and that this happens via a novel mechanism. To illuminate that mechanism, we offer a novel theoretical perspective on lay beliefs about free will. We distinguish 2 senses of (...) free will: (a) Freedom of action, which portrays the will as a dynamic choice-making mechanism and concerns whether the actor can exert volitional control via that mechanism at the time of action, and (b) Control of self-formation, which portrays the will as an enduring disposition (e.g., persistent desire to humiliate) and refers to whether the actor is truly the source of that disposition. Six experiments show that historicist narratives have no effect on perceived freedom of action, but rather temper blame by reducing perceived self-formative control. We also provide evidence against several additional theoretically derived alternative mediators (e.g., intentionality, perceived suffering). Further underlining the need to distinguish free will concepts, we show that biological narratives—unlike historicist narratives—temper blame via reductions in perceived freedom of action. Finally, to illuminate the meaning of “civilized” blame,” we show that historicist narratives specifically reduce the urge to inflict spiteful punishments on offenders, but leave intact the urge to nonviolently guide the offender toward moral improvement. (PsycINFO Database Record (c) 2017 APA, all rights reserved). (shrink)

Universals: Loux, M. J. The existence of universals. Russell, B. The world of universals. Quine, W. V. O. On what there is. Pears, D. F. Universals. Strawson, P. F. Particular and general. Wolterstorff, N. Qualities. Bambrough, R. Universals and family resemblances. Donagan, A. Universals and metaphysical realism. Sellars, W. Abstract entities. Wolterstorff, N. On the nature of universals.--Particulars: Loux, M. J. Particulars and their individuation. Black. M. The identity of indiscernibles. Ayer, A. J. The identity of indiscernibles. O'Connor, D. J. (...) The identity of indiscernibles. Allaire, E. B. Bare particulars. Chappell, V. C. Particulars re-clothed. Allaire, E. B. Another look at bare particulars. Meiland, J. W. Do relations individuate? Long, D. C. Particulars and their qualities. Copi, I. Essence and accident. Chandler, H. S. Essence and accident. Plantinga, A. World and essence. (shrink)