Excessive speed and speeding substantially compromise road safety in Germany and Switzerland.Approximately one third of all fatal accidents are caused by maladjusted speed.Recent studies attribute a special importance...Excessive speed and speeding substantially compromise road safety in Germany and Switzerland.Approximately one third of all fatal accidents are caused by maladjusted speed.Recent studies attribute a special importance to the impulsivity construct in the context of maladaptive road behavior.Thus,the effects of impulsivity on risky driving behaviors(speeding violations)were examined in a Swiss-German sample of N=361 car drivers(both on speed affine drivers and putative ordinary drivers).The participants filled in a questionnaire battery consisting of an impulsiveness scale as well as traffic-related attitudes and cognitive appraisal tendencies on the one hand and indicators for maladaptive behaviors at and beyond traffic domain on the other hand.The directions of the observed correlations between the scales were as expected,with impulsivity correlating negatively with age(young drivers scored higher)but not at all with gender or driving experience.To find out more about the functionality of impulsivity,specific personality profiles were carried out via cluster analysis.Three different control types were empirically found(impulsivity subtype,reduced compliance subtype,vulnerability subtype),while high impulsive drivers scored high in impulsivity,low on compliance,high on affective responsiveness and described themselves as affordance-prone.The impulsive type additionally shows more speeding offences stored in the driving license file,overrides speed limits for more than 15 km/h more frequently and even shows deviancy beyond traffic domain.The results are discussed in the light of the impulse control system and conclusions are drawn regarding assessment of driving aptitude and interventions.The theoretical framework including a hierarchical structured model of deviance was confirmed empirically.展开更多
Chemical Looping Combustion is a novel process that generates sequestration-ready CO_(2) from the combustion of woody biomass without requiring a gas separation step and without diluting the CO_(2) with N_(2) from air...Chemical Looping Combustion is a novel process that generates sequestration-ready CO_(2) from the combustion of woody biomass without requiring a gas separation step and without diluting the CO_(2) with N_(2) from air.This is achieved by oxidizing the fuel with lattice oxygen of a metal oxide oxygen carrier.When using cheap and abundant ilmenite ore(FeTiO3)as the oxygen carrier,the rather low reactivity towards volatiles released from the biomass upon devolatilization,as well as detrimental structural changes due to a segregation of Fe and Ti in the material,are of concern.These issues can be addressed by modifying ilmenite with Ca via melt infiltration.In this work,we demonstrate that this modification results in a good distribution of Ca throughout the ilmenite particles that a)prevents detrimental Fe/Ti segregation,b)improves the mechanical stability of the particle compared to materials prepared by solution impregnation and c)improves the reactivity of this material towards hydrogen and wet methane.Moreover,fixed bed experiments showed that the Ca modification not only resulted in increased methane conversion,but also in an increased degree of oxidation of gaseous intermediates CO and H2.We thus conclude that the performance of ilmenite in Chemical Looping processes can be significantly enhanced by Ca modification of ilmenite either prior to use or in-situ during operation of this bed material with Ca-rich fuels such as woody biomass.展开更多
文摘Excessive speed and speeding substantially compromise road safety in Germany and Switzerland.Approximately one third of all fatal accidents are caused by maladjusted speed.Recent studies attribute a special importance to the impulsivity construct in the context of maladaptive road behavior.Thus,the effects of impulsivity on risky driving behaviors(speeding violations)were examined in a Swiss-German sample of N=361 car drivers(both on speed affine drivers and putative ordinary drivers).The participants filled in a questionnaire battery consisting of an impulsiveness scale as well as traffic-related attitudes and cognitive appraisal tendencies on the one hand and indicators for maladaptive behaviors at and beyond traffic domain on the other hand.The directions of the observed correlations between the scales were as expected,with impulsivity correlating negatively with age(young drivers scored higher)but not at all with gender or driving experience.To find out more about the functionality of impulsivity,specific personality profiles were carried out via cluster analysis.Three different control types were empirically found(impulsivity subtype,reduced compliance subtype,vulnerability subtype),while high impulsive drivers scored high in impulsivity,low on compliance,high on affective responsiveness and described themselves as affordance-prone.The impulsive type additionally shows more speeding offences stored in the driving license file,overrides speed limits for more than 15 km/h more frequently and even shows deviancy beyond traffic domain.The results are discussed in the light of the impulse control system and conclusions are drawn regarding assessment of driving aptitude and interventions.The theoretical framework including a hierarchical structured model of deviance was confirmed empirically.
基金This work was supported by the New Energy and Industrial Technology Development Organization(NEDO,Japan)for the project on technological development for zero-emission coal power generation.
文摘Chemical Looping Combustion is a novel process that generates sequestration-ready CO_(2) from the combustion of woody biomass without requiring a gas separation step and without diluting the CO_(2) with N_(2) from air.This is achieved by oxidizing the fuel with lattice oxygen of a metal oxide oxygen carrier.When using cheap and abundant ilmenite ore(FeTiO3)as the oxygen carrier,the rather low reactivity towards volatiles released from the biomass upon devolatilization,as well as detrimental structural changes due to a segregation of Fe and Ti in the material,are of concern.These issues can be addressed by modifying ilmenite with Ca via melt infiltration.In this work,we demonstrate that this modification results in a good distribution of Ca throughout the ilmenite particles that a)prevents detrimental Fe/Ti segregation,b)improves the mechanical stability of the particle compared to materials prepared by solution impregnation and c)improves the reactivity of this material towards hydrogen and wet methane.Moreover,fixed bed experiments showed that the Ca modification not only resulted in increased methane conversion,but also in an increased degree of oxidation of gaseous intermediates CO and H2.We thus conclude that the performance of ilmenite in Chemical Looping processes can be significantly enhanced by Ca modification of ilmenite either prior to use or in-situ during operation of this bed material with Ca-rich fuels such as woody biomass.
