812 research outputs found
Growth rate of Rayleigh-Taylor turbulent mixing layers with the foliation approach
For years, astrophysicists, plasma fusion and fluid physicists have puzzled
over Rayleigh-Taylor turbulent mixing layers. In particular, strong
discrepancies in the growth rates have been observed between experiments and
numerical simulations. Although two phenomenological mechanisms (mode-coupling
and mode-competition) have brought some insight on these differences,
convincing theoretical arguments are missing to explain the observed values. In
this paper, we provide an analytical expression of the growth rate compatible
with both mechanisms and is valide for a self-similar, low Atwood
Rayleigh-Taylor turbulent mixing subjected to a constant or time-varying
acceleration. The key step in this work is the introduction of {\it foliated}
averages and {\it foliated} turbulent spectra highlighted in our three
dimensional numerical simulations. We show that the exact value of the
Rayleigh-Taylor growth rate not only depends upon the acceleration history but
is also bound to the power-law exponent of the {\it foliated} spectra at large
scales
Criminal narrative experience: relating emotions to offence narrative roles during crime commission
A neglected area of research within criminality has been that of the experience of the offence for the offender. The present study investigates the emotions and narrative roles that are experienced by an offender while committing a broad range of crimes and proposes a model of Criminal Narrative Experience (CNE). Hypotheses were derived from the Circumplex of Emotions (Russell, 1997), Frye (1957), Narrative Theory (McAdams, 1988) and its link with Investigative Psychology (Canter, 1994). The analysis was based on 120 cases. Convicted for a variety of crimes, incarcerated criminals were interviewed and the data were subjected to Smallest Space Analysis (SSA). Four themes of Criminal Narrative Experience (CNE) were identified: Elated Hero, Calm Professional, Distressed Revenger and Depressed Victim in line with the recent theoretical framework posited for Narrative Offence Roles (Youngs & Canter, 2012). The theoretical implications for understanding crime on the basis of the Criminal Narrative Experience (CNE) as well as practical implications are discussed
Cooptation and Coalition Mobilization
The question addressed by this research was, “When structural circumstances make revolutionary action likely, under what conditions will a cooptation strategy prevent subordinate revolts?” Experimental procedures established a group status hierarchy consisting of a leader and two subordinates. Groups earned collective outcomes, and the leader usurped an inequitable portion of these outcomes. In this context, the first experiment shows that a cooptation strategy (i.e., offer of a promotion to one of two subordinates) inhibits subordinate revolts. Two additional experiments indicate that the cooptation strategy is most effective (a) if the offer (strategy) provides the target of cooptation a source of personal gain; (b) if the offer (strategy) is a result of the leader’s own volition, rather than situational constraints; and (c) if the leader conveys a strong commitment to follow through on the promotion offer. The results are interpreted with reference to subjective-expected-utility and reciprocity theories
Sustainable Agriculture and the Structure of North Dakota Agriculture
Environmental Economics and Policy, Industrial Organization, Production Economics,
A Comparison of Four Professional Groups\u27 Support for a Strengthened DUI Law
This study examined support patterns among criminal justice professionals for an enhanced DUI law. We surveyed North Dakota\u27s police, prosecutors, judges, and addiction counselors to measure their personal support and their perceptions of the support of others for the law. Respondents generally favored the strengthened law, but consistent with role theory, there were significant between group differences. There also were significant differences in personal versus perceived peer support and in perceived peer support versus the perceived support of other groups. Groups tended to agree in the differential levels of support they attributed to other groups. Implications for a coordinated system approach to combatting DUI are identified
Selected Characteristics of North Dakota Farm Families Engaged in Sustainable Agricultural Practices
Environmental Economics and Policy, Farm Management, Resource /Energy Economics and Policy,
Expressive and Instrumental Offending: Reconciling the Paradox of Specialisation and Versatility
Although previous research into specialisation has been dominated by the debate over the existence of specialisation versus versatility, it is suggested that research needs to move beyond the restrictions of this dispute. The current study explores the criminal careers of 200 offenders based on their criminal records, obtained from a police database in the North West of England, aiming to understand the patterns and nature of specialisation by determining the presence of differentiation within their general offending behaviours and examining whether the framework of Expressive and Instrumental offending styles can account for any specialised tendencies that emerge. Fifty-eight offences were subjected to Smallest Space Analysis. Results revealed that a model of criminal differentiation could be identified and that any specialisation is represented in terms of Expressive and Instrumental offending styles
Novel technique to extract experimental symmetry free energy information of nuclear matter
A new method of accessing information on the symmetry free energy from yields
of fragments produced in Fermi-energy heavy-ion collisions is proposed.
Furthermore, by means of quantum fluctuation analysis techniques, correlations
between extracted symmetry free-energy coefficients with temperature and
density were studied. The obtained results are consistent with those of
commonly used isoscaling techniques.Comment: 6 pages, 3 figures Heavy-ion nuclear reactions at Fermi energies,
Nuclear equation of State, Fragmentatio
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