bluuebunny/crossref_metadata_2025 huggingface dataset:
No steady water waves of small amplitude are supported by a shear flow with a still free surface
Authors: Kozlov Vladimir , Kuznetsov Nikolay
Published: February 2013

The two-dimensional free-boundary problem describing steady gravity waves with vorticity on water of finite depth is considered. It is proved that no small-amplitude waves are supported by a horizontal shear flow whose free surface is still, that is, it is stagnant in a coordinate frame such that the flow is time-independent in it. The class of vorticity distributions for which such flows exist includes all positive constant distributions, as well as linear and quadratic ones with arbitrary positive coefficients.
Nonlinear resonant interactions of interfacial waves in horizontal stratified channel flows
Authors: Campbell Bryce K. , Liu Yuming
Published: February 2013

We consider the problem of nonlinear resonant interactions of interfacial waves with the presence of a linear interfacial instability in an inviscid two-fluid stratified flow through a horizontal channel. The resonant triad consists of a (linearly) unstable wave and two stable waves, one of which has a wavelength that can be much longer than that of the unstable component. Of special interest is the development of the long wave by energy transfer from the base flow due to the coupled effect of nonlinear resonance and interfacial instability. By use of the method of multiple scales, we derive the interaction equations which govern the time evolution of the amplitudes of the interacting waves including the effect of interfacial instability. The solution of the evolution equations shows that depending on the flow conditions, the (stable) long wave can achieve a bi-exponential growth rate through the resonant interaction with the unstable wave. Moreover, the unstable wave can grow unboundedly even when the nonlinear self-interaction effect is included, as do the stable waves in the associated resonant triad. For the verification of the theoretical analysis and the practical application involving a broadbanded spectrum of waves, we develop an effective direct simulation method, based on a high-order pseudo-spectral approach, which accounts for nonlinear interactions of interfacial waves up to an arbitrary high order. The direct numerical simulations compare well with the theoretical analysis for all of the characteristic flows considered, and agree qualitatively with the experimental observation of slug development near the entrance of two-phase flow into a pipe.
Density difference-driven segregation in a dense granular flow
Authors: Tripathi Anurag , Khakhar D. V.
Published: February 2013

We consider the segregation of spheres of equal size and different density flowing over an inclined plane, theoretically and computationally by means of distinct element method (DEM) simulations. In the first part of the work, we study the settling of a single higher-density particle in the flow of otherwise identical particles. We show that the motion of the high-density tracer particle can be understood in terms of the buoyancy and drag forces acting on it. The buoyancy force is given by Archimedes principle, with an effective volume associated with the particle, which depends upon the local packing fraction, $\phi $. The buoyancy arises primarily from normal forces acting on the particle, and tangential forces have a negligible contribution. The drag force on a sphere of diameter $d$ sinking with a velocity $v$ in a granular medium of apparent viscosity $\eta $ is given by a modified Stokes law, ${F}_{d} = c\pi \eta dv$. The coefficient ($c$) is found to decrease with packing fraction. In the second part of the work, we consider the case of binary granular mixtures of particles of the same size but differing in density. A continuum model for segregation is presented, based on the single-particle results. The number fraction profile for the heavy particles at equilibrium is obtained in terms of the effective temperature, defined by a fluctuation–dissipation relation. The model predicts the equilibrium number fraction profiles at different inclination angles and for different mass ratios of the particles, which match the DEM results very well. Finally, a complete model for the theoretical prediction of the flow and number fraction profiles for a mixture of particles of different density is presented, which combines the segregation model with a model for the rheology of mixtures. The model predictions agree quite well with the simulation results.
Harvey, by Hercules! The Hero of the Blood’s Circulation
Authors: O’ROURKE BOYLE MARJORIE
Published: February 2013

This article continues the analyses inMedical History52 (2008), 73–90, 365–86 of William Harvey’s self-understanding as the philosopher and discoverer of the blood’s circulation. Harvey brilliantly and subversively assumed the persona of the mythological Hercules to embody his own anatomical labour inDe motu cordis et sanguinis(1628). He reprised the role in self-defence against accusations in the College of Physicians, London, of his breach of faith with medical tradition. Harvey sought to usurp the medical epithet ‘a second Hercules’ by reforming humanist dependence on ancient texts as authoritative medicine. A knowledge of the theory and practice of Renaissance humanism discloses his identification with the Herculean labour of cleansing the Augean stable. He employed anatomical demonstration against Galen’s porous cardiac septum, which admitted blood across the ventricles. Harvey’s oathmeherculeswore against Galen’sDiato assert the necessity of opening an alternate route for the blood flow. His Herculean labour was to dam the cardiac septum and divert the blood flow into a continuous channel through the arteries and veins. His circulation of the blood also imitated Hercules’ successful dependence on the force of the water flow to flush the Augean stable. Harvey’scopiadid not denote a quantitative amount but a powerful supply. Harvey aspired to be, like Hercules, immortal, a term which the College belatedly acknowledged. This cultural analysis exposes Harvey’s professional issues and personal ambitions, so to promote a fuller understanding of his historic role in medical discovery.
‘Searching for the People in Charge’: Appraising the 1983 Griffiths NHS Management Inquiry
Authors: GORSKY MARTIN
Published: February 2013

This is the first of two related articles in the present volume which examine the recent history of health services management using the case of the British National Health Service (NHS). In the historiography of the NHS the 1980s is widely seen as a watershed, when public policy first sought to introduce market disciplines into its operation. Administrative and managerial reforms were central to this process, and their origins and impact have been the subject of continuing debate. This article examines and evaluates one of the key events in this history, the Griffiths NHS Inquiry of 1983, which put in place the principles of ‘general management’ in the NHS. Drawing on both documentary records and oral evidence it offers fresh perspectives on the reasons why the Conservative government embarked on this reform, on the workings of the inquiry team under the leadership of the businessman Roy Griffiths, and on the uneven course of the implementation of his recommendations. While its initial impact arguably did not meet the expectations of its supporters, it is suggested that several of Griffiths’ key concerns have grown, not diminished, in importance as aspects of subsequent health politics. These include: the need for clinician involvement in NHS management and financing; the conundrum of how to depoliticise the central direction of the service while retaining political accountability; the desirability of measuring and improving performance; and the question of how best to incorporate the wishes of patients and public in the decision-making arena.
Structural controls in the western offshore Midland Valley of Scotland: implications for Late Palaeozoic regional tectonics
Authors: CALDWELL W. G. E. , YOUNG G. M.
Published: February 2013

New detailed mapping and related field studies, together with re-assessment of prior investigations, have revealed that three groups of faults, orientated broadly NE, N and NW, have been the primary controls on stratigraphical, structural and geomorphological evolution in the upper Firth of Clyde since their initiation by proto-Variscan stresses in Late Devonian time. Extended control has been achieved through repeated episodic reactivation, during which existing lines of fracture were rejuvenated and others of similar orientation initiated. Movements on two (if not all three) groups of faults persisted until middle Palaeogene time at least. The faults have been augmented by two sets of irregularly distributed, open, plunging folds, broadly N–S and E–W in their axial orientations. Some N–S folds may be attributed to oblique or strike-slip movement on reactivated caledonoid faults, others to intermittent transpression, probably in Namurian–Westphalian times, affecting mainly the northeastern Midland Valley but stretching beyond the massif of the Clyde Lava Plateau to register a weakened presence as far W as the upper Firth. The N–S folds and dextral strike-slip movements on some faults may be far-field expressions of the Uralian Orogeny, whereas earlier, sinistral displacements on NE faults and the development of small, later and less-significant E–W folds may be related to different phases of long-lived Variscan compression from the S.
ASTROLOGY AND HUMAN VARIATION IN EARLY MODERN ENGLAND
Authors: DAWSON MARK S.
Published: February 2013

Processes for the identification of criminal suspects tell us a great deal about wider cultural assumptions and social prejudices regarding somatic difference; its causes, relative degree, and consequence. If early modern Europeans had something approaching a forensic science, it was astrology, which has recently garnered renewed attention from historians of ideas. Rather than assume astrology's seventeenth-century decline in the face of revolutionary natural philosophy, what follows suggests that English astrology remained significant for mundane bodily discrimination, in the context of both a more deliberate, gradual reform and the tenacity of centuries-old humoral physiology. More importantly, scrutiny of astrological practice, and the logic underpinning its lasting currency, can reveal much about the significance of bodily contrasts and the meanings ascribed to them by Tudor-Stuart folk.
SACRED HISTORY AND POLITICAL THOUGHT: NEAPOLITAN RESPONSES TO THE PROBLEM OF SOCIABILITY AFTER HOBBES
Authors: ROBERTSON JOHN
Published: February 2013

From the mid-seventeenth century, the problem of human sociability, long a staple of natural jurisprudence, became even more central to political thought. Faced with Hobbes's insistence on man's natural unsociability, Protestant thinkers continued to treat the question from within natural law. For reasons we do not yet understand, however, Catholic thinkers did not. Instead, it is argued here, they turned to sacred history, and in particular to the Old Testament, as the earliest record of the formation of human societies, Hebrew and gentile. The materials for this enquiry were provided by new critical scholarship on the Bible and the peoples of the ancient Near East. Despite the hostility of the authorities in Rome to its findings, this scholarship was widely available in the Catholic world, notably so in contemporary Naples. Two of the most remarkable applications of sacred history to the problem of sociability were by the Neapolitans Pietro Giannone, in his ‘Triregno’ (1731–3), and Giambattista Vico, in the Scienza nuova (1725–44). These works explored the ways in which family relations, religious practices, and war enabled the ancient Hebrews and their gentile neighbours to form and maintain societies, notwithstanding the unsocial tendency of human passions.
BEYOND THE FORBIDDEN BEST-SELLERS OF PRE-REVOLUTIONARY FRANCE
Authors: CURRAN MARK
Published: February 2013

Robert Darnton's acclaimed 1995 work on the late eighteenth-century francophone illegal book trade,The forbidden best-sellers of pre-revolutionary France, has become one of the most cited and studied texts in its field. The culmination of thirty years' archival research and reflection, it roots Darnton's previous case-study-driven articles and monographs in a wide-ranging empirical survey of the order books of the Swiss printer-booksellers, the Société typographique de Neuchâtel. It claims to offer readers a picture of what illegal books went into bookshops everywhere in pre-revolutionary France. The first fruits of the French Book Trade in Enlightenment Europe project, a digital humanities initiative that has created an on-line database revealing the STN's entire trade, this article challenges Darnton's interpretation of the nature and utility of the Neuchâtel archive. It demonstrates that the STN's order books are an unreliable gauge of general French demand. It goes further. It argues for a nuanced polycentric understanding of the eighteenth-century Francophone book trade, and outlines a bibliometric digital humanities pathway that might lead us there.
STEAM POWER AND BRITISH INFLUENCE IN BAGHDAD, 1820–1860
Authors: PARRY J. P.
Published: February 2013

Very little has been published on British political activity in the province of Baghdad in the nineteenth century. Indeed, those formally responsible for it – officials in India – considered the region insignificant. This article argues, however, that it was not insignificant either to men on the spot or to influential British public figures in London and Constantinople. These men argued for its strategic and commercial potential, based on an inter-continental rather than a narrowly Indian view of policy, and optimism about the transformative material and moral power of steamships. Their pressure was responsible for the introduction of British armed steamers to the Mesopotamian rivers in 1835 and their retention throughout the century. This helped to ensure that the British had greater power in the region than any rival. The British also cultivated good relations with Arabs, expecting Ottoman rule to collapse in favour of something more progressive. The case of Baghdad shows the value for diplomatic historians of seeing Britain's European and Indian strategy as connected. It also raises doubts about the importance to British officials of promoting specific commercial interests abroad: the British in the region were much more concerned with the projection of power, reliability, and even-handedness. For the early Victorian mind, the key to progress was surely not the making of particular tariff arrangements, but the dynamic potential of steam itself.
DÉTENTE 1914: SIR WILLIAM TYRRELL'S SECRET MISSION TO GERMANY
Authors: OTTE T. G.
Published: February 2013

Based on hitherto unused archival material, this article reconstructs the genesis of a clandestine mission to Germany by Sir Edward Grey's private secretary, Sir William Tyrrell, planned for the summer of 1914. The mission remained abortive, but it offers fresh insights into a growing sense of détente in Great Power relations on the eve of the First World War. Although the episode involved key officials in London and Berlin, the article emphasizes that, pace many recent scholars of the period, the Anglo-German antagonism was not the central concern of British policy-makers. Rather, relations between the two countries were a function of Anglo-Russian relations, and the revival of Russian power after 1912 provides the proper context to the attempts by British and German officials to place relations between their countries on a friendlier footing. The article thus also calls into question criticisms of the British foreign secretary as irrevocably ententiste, and provides an antidote to assumptions of the First World War as somehow inevitable.
AT WAR WITH THE PASS LAWS? REFORM AND THE POLICING OF WHITE SUPREMACY IN 1940s SOUTH AFRICA
Authors: SHEAR KEITH
Published: February 2013

This article analyses a key reformist gesture by General Smuts's Second World War South African government – the May 1942 order suspending enforcement of the pass laws in major cities. Hated by Africans for curbing their mobility, employment opportunities, and urban residence rights, the pass laws were a fundamental instrument of white supremacy. What then did the suspension order signify? Reconstructing debates and divisions within and beyond the state, the article traces the steps leading to the suspension order, and discusses the responses to its implementation resulting in its later withdrawal. The account considers common explanations for the suspension order's genesis: industry's demand for labour, the wartime state's reduced policing capability, and official anxieties about Africans’ loyalty at a time of vulnerability to invasion. Of these, only the last has clear merit. The real puzzle is the relaxation's continuance beyond the emergency situation of 1942. For this, the credit belongs to the momentum of liberal organization and opinion in encouraging advocates of reform within the state to hold their nerve. Only gradually could the opposition Nationalists, the party of apartheid, mobilize whites’ hostility to black urbanization, thereby enhancing the influence of restorationist elements within the state calling for renewed coercion.
THE ASSASSINATION CULTURE OF IMPERIAL BRITAIN, 1909–1979
Authors: BALL SIMON
Published: February 2013

The importance of political assassination lies in the response of the state. That response takes place within a specific culture. This article analyses the assassination culture of the British imperial state. Most studies of assassination in British history concentrate on specific events. On the basis of detailed archival investigation the current article argues that long-term trends are discernible, in particular that the imperial state had a recurrent reflex in characterizing the conspiracies that threatened it. This reflex, in turn, governed the nature of the response to assassination.
DUTIFUL SUBJECTS, PATRIOTIC CITIZENS, AND THE CONCEPT OF ‘GOOD CITIZENSHIP’ IN TWENTIETH-CENTURY TANZANIA
Authors: HUNTER EMMA
Published: February 2013

The growing interest in citizenship among political theorists over the last two decades has encouraged historians of twentieth-century Africa to ask new questions of the colonial and early post-colonial period. These questions have, however, often focused on differential access to the rights associated with the legal status of citizenship, paying less attention to the ways in which conceptions of citizenship were developed, debated, and employed. This article proposes that tracing the entangled intellectual history of the concept of ‘good citizenship’ in twentieth-century Tanzania, in a British imperial context, has the potential to provide new insights into the development of one national political culture, while also offering wider lessons for our understanding of the global history of political society.
Director Ownership, Governance, and Performance
Authors: Bhagat Sanjai , Bolton Brian
Published: February 2013

We study the impact of the Sarbanes-Oxley Act on the relationship between corporate governance and company performance. We consider 5 measures of corporate governance during the period 1998–2007. We find a significant negative relationship between board independence and operating performance during the pre-2002 period, but a positive and significant relationship during the post-2002 period. Our most important contribution is a proposal of a governance measure, namely, dollar ownership of the board members, that is simple, intuitive, less prone to measurement error, and not subject to the problem of weighting a multitude of governance provisions in constructing a governance index.
Current–voltage characteristics of ionic liquid–air glow discharges
Authors: KAREEM T. ABDUL , KALIANI A. ANU
Published: February 2013

I–V characteristics of air glow discharge, ionic liquid–contact air glow discharge and ionic liquid–air glow discharge are presented and photographs of the discharges are shown. It is found that the I–V characteristics of the air glow discharge always obey Ohm's law but I–V characteristics of the ionic liquid–contact air glow discharge and ionic liquid–air glow discharge obey Ohm's law only up to a particular voltage. A sudden burst of the electrolyte is observed for currents above a critical current.
Rethinking the Origins of British India: State Formation and Military-fiscal Undertakings in an Eighteenth Century World Region
Authors: ROY TIRTHANKAR
Published: February 2013

This paper discusses the rise of the East India Company in the contested political world of eighteenth century India, with reference to the manner in which economic power was deployed to enhance military power. It is shown that there was only one successful model of military-fiscal strategy during this time, and that the Company's success was due to interactions between three factors—taxable resources, the strategies of its rivals, and institutional choices.
Molecular characterization and analysis of a novel calcium-dependent protein kinase from Eimeria tenella
Authors: HAN H.Y. , ZHU S.H. , JIANG L.L. , LI Y. , DONG H. , ZHAO Q.P. , KONG C.L. , HUANG B.
Published: February 2013

The calcium-dependent protein kinases (CDPKs) are unique enzymes found only in plants, green algae, ciliates and apicomplexan parasites. In this study, a novel CDPK gene of Eimeria tenella, designed EtCDPK3, was cloned using rapid amplification of cDNA ends (RACE) based on the expressed sequence tag (EST). The entire cDNA of EtCDPK3 contained 1637 nucleotides encoding 433 amino acids and the deduced EtCDPK3 protein had canonical characteristic domains identified in other CDPKs, including a well-conserved amino-terminal kinase domain and a carboxy-terminal calmodulin-like structure with 4 EF-hand motifs for calcium binding. The expression profiles of the EtCDPK3 gene in different development stages were investigated by real-time quantitative PCR. Messenger RNA levels from the EtCDPK3 gene were higher in sporozoites than in other stages (unsporulated oocysts, sporulated oocysts and merozoites). Western blot analysis showed that rabbit antiserum against recombinant EtCDPK3 could recognize a native 49 kDa protein band of parasite. Indirect immunofluorescent antibody labelling revealed dispersed localization of EtCDPK3 during the first schizogony and intense specific staining. EtCDPK3 was located at the apical end of the sporozoites after early infection of DF-1 cells and the protein was highly expressed. Inhibition of EtCDPK3 function using specific antibodies reduced the ability of E. tenella to invade host cells. These results suggested that EtCDPK3 may be involved in invasion and survival of the parasite intracellular stages of E. tenella. Because this kinase family is absent from hosts, it represents a valid target that could be exploited for chemotherapy against Eimeria spp.
Golden hamster (Mesocricetus auratus) as an experimental model forLeishmania(Viannia)braziliensisinfection
Authors: GOMES-SILVA ADRIANO , VALVERDE JOANNA GARDEL , RIBEIRO-ROMÃO RAQUEL PERALVA , PLÁCIDO-PEREIRA ROSA MARIA , DA-CRUZ ALDA MARIA
Published: February 2013

The lack of an adequate model forLeishmania(Viannia)braziliensisinfection is a limiting factor for studying American tegumentary leishmaniasis (ATL). The golden hamster (Mesocricetus auratus) is a promising model because besides being highly susceptible to dermotropicLeishmaniainfection, the lesions are very similar to cutaneous leishmaniasis (CL) in humans. However, differentLeishmaniaisolates or species and/or protocols have resulted in different outcomes, whereas no study has evaluated the reproducibility ofL. braziliensisinfection in this model. The natural history ofL. braziliensisinfection in 34 hamsters was evaluated by using a single parasite isolate in 8 independent experiments under similar experimental conditions. Clinical, histological and immunological analyses were performed. The hamsters presented skin ulcers similar to those observed in ATL. The intra-experiment lesion increment tended to show an intermediary variance. Histological analysis of infected skins showed granulomatous reaction, scarce amastigotes, and Schaumann's bodies. Blood lymphocytes proliferated in response to leishmanial antigens. The severity of the infection was positively correlated to spleen weight, and the titres of anti-LeishmaniaIgG antibodies. Our findings indicate that the hamster is an appropriate model for immunopathogenesis studies of CL caused byL. braziliensis, supporting its use in clinical, vaccine and chemotherapy experimental protocols.
Modelling the short- and long-term impacts of drenching frequency and targeted selective treatment on the performance of grazing lambs and the emergence of anthelmintic resistance
Authors: LAURENSON YAN C. S. M. , BISHOP STEPHEN C. , FORBES ANDREW B. , KYRIAZAKIS ILIAS
Published: February 2013

Refugia-based treatment strategies aim to prolong anthelmintic efficacy by maintaining a parasite population unexposed to anthelmintics. Targeted selective treatment (TST) achieves this by treating only animals that will benefit most from treatment, using a determinant criterion (DC). We developed a mathematical model to compare various traits proposed as DC, and investigate impacts of TST and drenching frequency on sheep performance and anthelmintic resistance. Short term, decreasing the proportion of animals drenched reduced benefits of anthelmintic treatment, assessed by empty body weight (EBW), but decreased the rate of anthelmintic resistance development; each consecutive drenching had a reduced impact on average EBW and an increased impact on the rate of anthelmintic resistance emergences. The optimal DC was fecal egg count, maintaining the highest average EBW when reducing the proportion of animals drenched. Long-term, reducing the proportion of animals drenched had little impact on total weight gain benefits, across animals and years, whilst reducing drenching frequency increased it. Decreasing the frequency and proportion of animals drenched were both predicted to increase the duration of anthelmintic efficacy but reduce the total number of drenches administered before resistance was observed. TST and frequency of drenching may lead to different benefits in the short versus long term.
Childhood family factors predict developmental trajectories of hostility and anger: a prospective study from childhood into middle adulthood
Authors: Hakulinen C. , Jokela M. , Hintsanen M. , Pulkki-Råback L. , Hintsa T. , Merjonen P. , Josefsson K. , Kähönen M. , Raitakari O. T. , Keltikangas-Järvinen L.
Published: February 2013

Background

Low socio-economic status (SES), and a conflictive, cold and unsupportive family environment in childhood have been associated with early adulthood hostility. However, it is unknown whether this association changes in magnitude with age from childhood to adulthood. We investigated whether childhood family factors (SES and parental child-rearing style) predicted differential development of offspring hostility and anger from early to middle adulthood.

Method

Between 2041 and 2316 participants (age range 3–18 years at baseline) were selected from the longitudinal Young Finns study. The participants were followed for 27 years between 1980 and 2007. Childhood SES and parent's self-reported child-rearing style were measured twice: at baseline and 3 years after baseline. Hostility and anger were assessed with self-report questionnaires at 12, 17, 21 and 27 years after baseline.

Results

Low parental SES and hostile child-rearing style at baseline predicted higher mean levels of offspring anger and hostility. Low parental SES and one of the hostile child-rearing style components (strict disciplinary style) became more strongly associated with offspring hostility with age, suggesting an accumulating effect.

Conclusions

Childhood family factors predict the development of hostility and anger over 27 years and some of these family factors have a long-term accumulating effect on the development of hostility.
A latent class analysis of drug abuse in a national Swedish sample
Authors: Kendler K. S. , Ohlsson H. , Sundquist K. , Sundquist J.
Published: February 2013

Background

Drug abuse (DA) is a clinically heterogeneous syndrome. Using medical, legal, death and pharmacy records covering the entire population of Sweden, could we uncover meaningful subtypes of DA?

Method

We performed a latent class analysis (LCA) on all individuals in Sweden born 1950–1993 who were registered with DA or its consequences (n=192 501) and then validated these classes using demographics, patterns of co-morbidity with alcohol use disorder (AUD), non-DA crime and psychiatric illness, and the pattern of aggregation and co-aggregation in sibling pairs.

Results

The best-fit LCA had six classes: (1) low-frequency pure criminal, (2) high-frequency medical criminal, (3) low-frequency pure medical, (4) high-frequency medical, (5) prescription and (6) death. Each class had a distinct pattern of demographic features and co-morbidity and aggregated within sibling pairs with at least moderate specificity. For example, class 2 was characterized by early age at registration, low educational attainment, high male preponderance, high rates of AUDs, strong resemblance within sibling pairs [odds ratio (OR) 12.6] and crime and the highest risk for DA in siblings (20.0%). By contrast, class 5 had a female preponderance, late age at registration, low rates of crime and AUDs, high rates of psychiatric illness, high familiality within sibling pairs (OR 14.7) but the lowest observed risk for DA in siblings (8.9%).

Conclusions

DA as assessed by public records is a heterogeneous syndrome. Familial factors contribute substantially to this heterogeneity. Advances in our understanding of etiological processes leading to DA will be aided by a consideration of this heterogeneity.
A mutualistic approach to morality: The evolution of fairness by partner choice
Authors: Baumard Nicolas , André Jean-Baptiste , Sperber Dan
Published: February 2013

What makes humans moral beings? This question can be understood either as a proximate “how” question or as an ultimate “why” question. The “how” question is about the mental and social mechanisms that produce moral judgments and interactions, and has been investigated by psychologists and social scientists. The “why” question is about the fitness consequences that explain why humans have morality, and has been discussed by evolutionary biologists in the context of the evolution of cooperation. Our goal here is to contribute to a fruitful articulation of such proximate and ultimate explanations of human morality. We develop an approach to morality as an adaptation to an environment in which individuals were in competition to be chosen and recruited in mutually advantageous cooperative interactions. In this environment, the best strategy is to treat others with impartiality and to share the costs and benefits of cooperation equally. Those who offer less than others will be left out of cooperation; conversely, those who offer more will be exploited by their partners. In line with this mutualistic approach, the study of a range of economic games involving property rights, collective actions, mutual help and punishment shows that participants' distributions aim at sharing the costs and benefits of interactions in an impartial way. In particular, the distribution of resources is influenced by effort and talent, and the perception of each participant's rights on the resources to be distributed.
Partner choice, fairness, and the extension of morality
Authors: Baumard Nicolas , André Jean-Baptiste , Sperber Dan
Published: February 2013

Our discussion of the commentaries begins, at the evolutionary level, with issues raised by our account of the evolution of morality in terms of partner-choice mutualism. We then turn to the cognitive level and the characterization and workings of fairness. In a final section, we discuss the degree to which our fairness-based approach to morality extends to norms that are commonly considered moral even though they are distinct from fairness.
Intertemporal bargaining predicts moral behavior, even in anonymous, one-shot economic games
Authors: Ainslie George
Published: February 2013

To the extent that acting fairly is in an individual's long-term interest, short-term impulses to cheat present a self-control problem. The only effective solution is to interpret the problem as a variant of repeated prisoner's dilemma, with each choice as a test case predicting future choices. Moral choice appears to be the product of a contract because it comes from self-enforcing intertemporal cooperation.
Cooperation and fairness depend on self-regulation
Authors: Ainsworth Sarah E. , Baumeister Roy F.
Published: February 2013

Any evolved disposition for fairness and cooperation would not replace but merely compete with selfish and other antisocial impulses. Therefore, we propose that human cooperation and fairness depend on self-regulation. Evidence shows reductions in fairness and other prosocial tendencies when self-regulation fails.
Partner selection, coordination games, and group selection
Authors: Alvard Michael S.
Published: February 2013

The process of partner selection reflects ethnographic realities where cooperative rewards obtain that would otherwise be lost to loners. Baumard et al. neglect frequency-dependent processes exemplified by games of coordination. Such games can produce multiple equilibria that may or may not include fair outcomes. Additional, group-selection processes are required to produce the outcomes predicted by the models.
Can mutualistic morality predict how individuals deal with benefits they did not deserve?
Authors: Bonnefon Jean-François , Girotto Vittorio , Heimann Marco , Legrenzi Paolo
Published: February 2013

An individual obtains an unfair benefit and faces the dilemma of either hiding it (to avoid being excluded from future interactions) or disclosing it (to avoid being discovered as a deceiver). In line with the target article, we expect that this dilemma will be solved by a fixed individual strategy rather than a case-by-case rational calculation.
More to morality than mutualism: Consistent contributors exist and they can inspire costly generosity in others
Authors: Gill Michael J. , Packer Dominic J. , Van Bavel Jay
Published: February 2013

Studies of economic decision-making have revealed the existence of consistent contributors, who always make contributions to the collective good. It is difficult to understand such behavior in terms of mutualistic motives. Furthermore, consistent contributors can elicit apparently altruistic behavior from others. Therefore, although mutualistic motives are likely an important contributor to moral action, there is more to morality than mutualism.
Your theory of the evolution of morality depends upon your theory of morality
Authors: Kirkby David , Hinzen Wolfram , Mikhail John
Published: February 2013

Baumard et al. attribute to humans a sense of fairness. However, the properties of this sense are so underspecified that the evolutionary account offered is not well-motivated. We contrast this with the framework of Universal Moral Grammar, which has sought a descriptively adequate account of the structure of the moral domain as a precondition for understanding the evolution of morality.
Not all mutualism is fair, and not all fairness is mutualistic
Authors: Shaw Alex , Knobe Joshua
Published: February 2013

The target article convincingly argues that mutualistic cooperation is supported by partner choice. However, we will suggest that mutualistic cooperation is not the basis of fairness; instead, fairness is based on impartiality. In support of this view, we show that adults are willing to destroy others' resources to avoid inequality, a result predicted by impartiality but not by mutualistic cooperation.
Disentangling the sense of ownership from the sense of fairness
Authors: Tummolini Luca , Scorolli Claudia , Borghi Anna M.
Published: February 2013

Both evolutionary and developmental research indicate that humans are adapted to respecting property rights, independently (and possibly orthogonally) of considerations of fairness. We offer evidence from psychological experiments suggesting that enforcing one's rights and respecting others' possessions are basic cognitive mechanisms automatically activated and grounded in humans' sensory-motor system. This may entail an independent motivation that is more profound than considerations of fairness and impartiality.
Sense of fairness: Not by itself a moral sense and not a foundation of a lot of morality
Authors: Ramlakhan Nalini , Brook Andrew
Published: February 2013

Baumard et al. make a good case that a sense of fairness evolved and that showing this requires reciprocity games with choice of partner. However, they oversimplify both morality and the evolution of morality. Where fairness is involved in morality, other things are, too, and fairness is often not involved. In the evolution of morality, other things played a role. Plus, the motive for being fair originally was self-interest, not anything moral.
Baumard et al.'s moral markets lack market dynamics
Authors: Fessler Daniel M. T. , Holbrook Colin
Published: February 2013

Market models are indeed indispensable to understanding the evolution of cooperation and its emotional substrates. Unfortunately, Baumard et al. eschew market thinking in stressing the supposed invariance of moral/cooperative behavior across circumstances. To the contrary, humans display contingent morality/cooperation, and these shifts are best accounted for by market models of partner choice for mutually beneficial collaboration.
A longitudinal study of basic auditory processing and phonological skills in children with low IQ
Authors: KUPPEN SARAH , HUSS MARTINA , GOSWAMI USHA
Published: February 2013

Here we report a longitudinal follow-up of 103 children with low or typical IQ and good or poor word reading, first studied by Kuppen, Huss, Fosker, Mead, and Goswami (2011). Our current goal was to explore whether different basic auditory processing measures taken 14 months previously would predict development in word reading and phonology in this sample. We also assessed the stability over time for the associations among basic auditory processing, phonology, and reading reported by Kuppen et al. (2011) for low IQ readers. The auditory processing measures showed significant longitudinal relations with both reading and phonology, and associations between the measures were largely stable over time. The data suggest that basic auditory processing skills and phonological skills, rather than IQ, determine a child's progress in word reading, throwing light on the fundamental biological mechanisms that determine reading development. Children with low IQ and poor reading should thus be treated in the same way as children with an IQ-discrepancy defined reading disability, both in research studies and in terms of gaining access to targeted remediation.
Older people as co-researchers: a collaborative journey
Authors: BINDELS JILL , BAUR VIVIANNE , COX KAREN , HEIJING SERVÉ , ABMA TINEKE
Published: February 2013

In recent years there has been a distinguishable trend towards user involvement in ageing research. Researchers and policy makers both are increasingly convinced that user involvement is necessary to adapt research questions and methods to meet the needs of older people. Little is known, however, about the quality of collaborations between older people and researchers. This study systematically evaluates a collaboration undertaken between two academic researchers and three older people acting as co-researchers in an effort to identify the conditions required for equal collaboration. To evaluate the collaboration the co-researchers and academic researchers took part in individual in-depth interviews (after six months) and two reflection meetings (after six and 12 months). Throughout the collaboration, field notes were taken by both academic researchers and co-researchers. A detailed description of the collaboration is provided here, using the metaphor of a journey to illustrate the dynamics and the learning process of the participants. Interim reflection meetings – at which mutual expectations were expressed along with a frank discussion of prejudices, tasks and role divisions, and the sharing of personal and project-related needs and information – were found to be fruitful in achieving a positive working relationship and fostering an effective collaboration. We conclude that a learning perspective on participation can be a resource for learning and adaptive change.
The velocity dependent Krook model to calculate energetic electron transport in a laser produced plasma
Authors: Manheimer Wallace
Published: February 2013

Energetic electrons, with energy from many tens to several hundred keV can be generated in laser produced plasmas by such laser plasma instabilities as the 2ωp instability, which occurs at the quarter critical density. It is important to know not only how these are produced, but also how they are transported and deposit their energy in the interior and whether they preheat the fuel. We introduce the velocity dependent Krook approach to this problem, and compare it to other approaches that have appeared in the literature as regards accuracy and economy of incorporating in a fluid simulation. This velocity dependent Krook technique is reasonably accurate and reasonably simple and economical to incorporate into a fluid simulation.
Third harmonic generation of a nonlinear laser Eigen mode of a self sustained plasma channel
Authors: Kumar K.K. Magesh , Tripathi V.K.
Published: February 2013

The third harmonic generation of a self organized nonlinear laser Eigen mode of a two-dimensional plasma channel with complete electron evacuation from the inner region is investigated. The nonlinearities arise through the ponderomotive force and relativistic mass variations, while the ions are taken to be immobile. The second harmonic ponderomotive force produces electron density oscillations that beat with the oscillatory velocity due to the laser Eigen mode to create a nonlinear current, driving the third harmonic. As a0 increases up to the threshold value amin, at which complete electron evacuation begins in the inner region, the third harmonic amplitude rises rapidly. Above the threshold, as a0 increases, the width of the inner region where there is no third harmonic current, increases and third harmonic amplitude rises less rapidly. The conversion efficiency is found to be in reasonable agreement with the experimental results.
Research on the electromagnetic fields radiating during the operation of intense electron-beam accelerator
Authors: Fan Xuliang , Liu Jinliang , Lv Xinming
Published: February 2013

Strong electromagnetic fields are radiated during the operation of the intense electron-beam accelerator (IEBA), and it is investigated in this paper. It is obtained that the triggered spark-gap switch and the main switch of the IEBA are the radiation resources. Here, the radiation of the triggered spark-gap switch is researched carefully. Firstly, circuit simulation is used to simulate the current going through the switch. The electric fields generated by the current and its frequency spectra are both calculated. The electric fields of the IEBA are measured by using a bi-cone antenna. When the primary capacitor of the IEBA is charged to 20 kV, the radiation field with amplitude of 753.4 V/m, dominant frequency of 20.8 MHz and high frequency 100 MHz is obtained. The experiment results show reasonable agreements with the analysis. It is believed that the gas-gap switch is a new method to achieve wide-band radiation.
Modulation of continuous ion beams with low drift velocity by induced wakefield in background plasmas
Authors: Hu Zhang-Hu , Song Yuan-Hong , Zhao Yong-Tao , Wang You-Nian
Published: February 2013

Two-dimensional particle-in-cell simulations are performed to investigate the propagation of low energy continuous ion beams through background plasmas. It is shown that the continuous ion beam can be modulated into periodic short beam pulses by the induced wakefield, which can be adopted as a method to produce ultrashort ion beam pulses. Furthermore, the transport of the continuous ion beam in plasma with density gradient in the beam propagation direction is proposed and an enhanced longitudinal compression by density gradient is found due to the phase lock of ion pulses in the focusing regions of wakefield and reduced heating of plasma electrons.
Time evolution of the two-dimensional expansion velocity distributions of the cathode plasma in pulsed high-power diodes
Authors: Yang Jie , Shu Ting , Fan Yuwei
Published: February 2013

A combination of electrical and optical diagnostics has been used to investigate the time evolution of the two-dimensional expansion velocity distributions of the cathode plasma in pulsed high-power diodes. The perveance model based on the Child-Langmuir law was used to calculate the expansion velocity of the diode plasmas from voltage and current profiles. Additionally, a four-channel high speed framing camera was used to observe the formation and subsequent movement of the cathode plasma. More accurate and valuable information about the dynamics of the cathode plasma was also acquired by utilizing the digital image processing methods. Results from the experiments and theoretical analysis were compared. In this paper, the experiments have been performed using a high-voltage pulse generator with 200 kV output voltage and 110 ns pulse duration. Current densities up to 440 A/cm2were produced. The observation of the cathode plasma expansion in transverse direction indicated that the diode current was cathode-limited in the current rising stage (the first 60 ns of the current pulse). The perveance model should be modified taking in account the time dependent expanding plasma surface (i.e., not the whole cathode surface) for this period. The velocity in the direction parallel to the cathode surface (transverse velocity) was much larger than that in the direction perpendicular to the cathode surface (longitudinal velocity), and further, it dropped from 90 cm/μs to nearly 20 cm/μs rapidly. It was shown that, during the current flattop stage, the plasma filled out all the surface of cathode and the diode current was space-charge-limited. The values of the transverse velocity and longitudinal velocity were nearly the same and decreased relatively slowly. The satisfactory coincidence of experimental and calculated (both were in the range of 6–8 cm/μs) values of the cathode plasma expansion velocities was obtained.
A flexible method combining camera calibration and hand–eye calibration
Authors: Zhao Zijian , Weng Ying
Published: February 2013

We consider the conventional techniques of vision robot system calibration where camera parameters and robot hand–eye parameters are computed separately, i.e., first performing camera calibration and then carrying out hand–eye calibration based on the calibrated parameters of cameras. In this paper we propose a joint algorithm that combines the camera calibration and the hand–eye calibration together. The proposed algorithm gives the solutions of the cameras' parameters and the hand–eye parameters simultaneously by using nonlinear optimization. Both simulations and real experiments show the superiority of our algorithm. We also apply our algorithm in the real application of the robot-assisted surgical system, and very good results have been obtained.