Conditions for up-down asymmetry in the core of tokamak equilibria

A local magnetic equilibrium solution is sought around the magnetic axis in order to identify the key parameters defining the magnetic-surface's up-down asymmetry in the core of tokamak plasmas. The asymmetry is found to be determined essentially by the ratio of the toroidal current density flowing on axis to the fraction of the external field's odd perturbation that manages to propagate from the plasma boundary into the core. The predictions are tested and illustrated first with an analytical Solovev equilibrium and then using experimentally relevant numerical equilibria. Hollow current-density distributions, and hence reverse magnetic shear, are seen to be crucial to bring into the core asymmetry values that are usually found only near the plasma edge.Comment: 6 pages, 2 figures, submitted for publicatio

Some antecedents and outcomes of passionate desire for fashion clothes and accessories

Fashion trends and consumer-fashion brand relationships have been subject of study for both researchers and practitioners. Yet, as far as we know, there is a lack of analysis of the process behind the creation of a fashion trend, in previous studies. Therefore the main goal of this research was to start to understand the process behind the creation of a fashion passion for clothes and accessories, particularly to understand in what extend do narcissism and social values influence passionate desire and then, the way passionate desire influences positive word-of-mouth and affective commitment. Findings reveal that Social values have a positive and significant direct effect on Passionate desire. Yet, the strength of the relationship between Narcissism and Passionate desire is weak. The strength of the relationship between Passionate desire and word-of-mouth is weaker than the relationship between Passionate desire and Affective commitment. The current study also provides managerial implications and suggestions for further research.info:eu-repo/semantics/publishedVersio

It is all about exhibitionism!: The fashion passionate desire of e-buyers

The aim of this study is to explore the effect of social context on passion for fashion and the exhibitionist tendency. The study was conducted in two phases, the first one being exploratory (n=109), followed by a quantitative phase (n=425). The findings reveal that the social influence is very important in enhancing the desire to use fashion products. Further, the exhibitionist tendency acts as a mediator between passionate desire for fashion products and word-of-mouth.info:eu-repo/semantics/acceptedVersio

Nickel induced endogenous dermatitis: two cases report

A sensibilização ao níquel representa uma das principais causas de dermatite de contacto alérgica. Um número significativo de doentes apresenta lesões cutâneas, em locais que não estão em contacto directo com este metal. Nos últimos anos a influência do conteúdo em níquel da dieta na evolução da dermatite ao níquel tem merecido particular atenção. Descrevem-se os casos de duas doentes com dermatite de contacto ao níquel em que, apesar da evicção total do contacto com este metal, persistiam lesões de dermatite eczematosa, predominando nas zonas de maior sudação. Com a exclusão da dieta de alimentos com alto teor em níquel observou-se uma redução progressiva da intensidade do eczema, conducente ao desaparecimento total das lesões. As doentes foram, então, submetidas a prova de provocação oral com sulfato de níquel. Na primeira doente estudada observou-se aparecimento de eritema, prurido e reacção eczematosa, generalizados, doze horas após a ingestão de 20 mg de sulfato de níquel. Concomitantemente verificou-se a ocorrência de eritema pruriginoso e pequenas vesículas, no local de aplicação do patch teste ao níquel. No segundo caso a reactivação da dermatite ocorreu seis horas após a ingestão de 10 mg de sulfato de níquel. A manutenção de dieta restritiva em alimentos com alto teor em níquel permitiu o desaparecimento total da dermatite e estabilização clínica que se mantém desde há 6 meses. O diagnóstico de dermatite endógena induzida pela ingestão de níquel foi demonstrado através da realização de prova de provocação oral. A excreção de níquel através do suor parece ser relevante. A redução da ingestão diária de níquel, permitindo a menor concentração deste elemento no suor poderá explicar a melhoria da dermatite, particularmente, nas zonas cutâneas de maior sudação

Fast magnetic reconnection in the plasmoid-dominated regime

A conceptual model of resistive magnetic reconnection via a stochastic plasmoid chain is proposed. The global reconnection rate is shown to be independent of the Lundquist number. The distribution of fluxes in the plasmoids is shown to be an inverse square law. It is argued that there is a finite probability of emergence of abnormally large plasmoids, which can disrupt the chain (and may be responsible for observable large abrupt events in solar flares and sawtooth crashes). A criterion for the transition from magnetohydrodynamic to collisionless regime is provided.Comment: 4 pages, 1 figur

Response of "Bromus diandrus" populations from Castilla-León to sulfosulfuron and glyphosate

Se ha evaluado la respuesta de un total de 87 poblaciones de “Bromus diandrus” (bromo) recogidas en muestreos al azar realizados en campos de cereal de Castilla y León y de una población recogida en el INIA, a los herbicidas glifosato y sulfosulfuron, utilizados durante años para el control de bromo en trigo. Los ensayos se han realizado en invernadero con 3 dosis: control, la dosis de herbicida recomendada en la etiqueta del producto (20 g. m.a. ha-1 para sulfosulfuron y de 800 g. m.a. ha-1 para glifosato) y la mitad de la dosis recomendada, con 5 repeticiones por dosis y 100 semillas por repetición y población. No se encontraron poblaciones resistentes a las dosis recomendadas de ambos herbicidas, pero el 55% de las poblaciones mostraron cierta resistencia a sulfosulfuron y el 14% a glifosato.The response of 87 “B. diandrus” (ripgut brome) populations collected in cereal fields of Castilla-León and of one population collected in INIA (Madrid), to the herbicides glyphosate and sulfosulfuron, used for brome control in wheat during years, has been evaluated. The bioassays were conducted under greenhouse conditions with three doses: control, the recommended label herbicide dose (20 g m.a. ha-1 for sulfosulfuron and 800 g m.a. ha-1 for glyphosate) and half dose, with 5 replications per dose and 100 seeds per replication and population. Resistant populations were not found when the herbicide label dose was applied, but 55% of the populations showed certain resistance to sulfosulfuron and 14% to glyphosate

Response of populations of "Avena sterilis" from Castilla- León to herbicides used for its control

Se ha evaluado la respuesta en invernadero de 25 poblaciones de Avena sterilis L. recogidas en Castilla y León a los herbicidas inhibidores del enzima ACCasa (Acetil Coenzima A carboxilasa) clodinafop- propargil, diclofop-metil y tralkoxidim. Se han utilizado 2 dosis (la dosis recomendada en campo y la dosis doble) además de un control no tratado, con 3 repeticiones por dosis y 25 semillas por repetición. La dosis recomendada fue de 40,8 g. m.a. ha-1 para clodinafop, 900 g. m.a. ha-1 para diclofop y de 400 g. m.a. ha-1 para tralkoxidim. Todas las poblaciones muestreadas fueron susceptibles al herbicida tralkoxidim cuando se empleaba a la dosis recomendada. A pesar de que la mayoría de las poblaciones se clasificaron como sensibles en su respuesta a los herbicidas “fop” utilizados, se detectaron poblaciones que muestran cierto grado de resistencia a ambos herbicidas, en mayor medida al diclofop-metil.The response of 25 populations of Avena sterilis L. collected in Castilla-León to the ACCase (acetyl coenzyme A carboxylase) inhibiting herbicides clodinafop-propargyl, diclofop-methyl and tralkoxydim has been evaluated in the green-house. Two herbicide doses were used(the recommended field rate and the double rate) plus a non-treated control, with 3 replications per dose and 25 seeds per replication. The field rate was 40.8 g a.i. ha-1 for clodinafop, 900 g a.i. ha-1 for diclofop and 400 g a.i. ha-1 for tralkoxydim. All sampled populations were sensitive to tralkoxydim herbicide when used at the recommended field rate. Although most of the populations were classified as sensitive in the response to the used “fop” herbicides, populations showed some degree of resistance to both herbicides but in a greater extent to diclofop-methyl