Effect of interparticle forces on the fluidization of fine particles

Report studies elucidation and description of effect of interparticle forces on feasibility of gaseous fluidization of particles below 50 microns in diameter. Interparticle forces are determined by inclined-plane method. Study indicated that fluidizability is related to the interparticle adhesive force

Effects of low pressure exhaust gas recirculation on regulated and unregulated gaseous emissions during NEDC in a light-duty diesel engine

Regulated and unregulated gaseous emissions with high pressure and low pressure EGR (exhaust gas recirculation) system were tested in a 4-cylinder, light-duty diesel EURO IV engine typically used in European vehicles. Four different engine calibrations with the low pressure EGR system were studied. Regulated emissions of NOX, CO, HC and CO2 were measured for each configuration. Unburned Hydrocarbon Speciation, HCHO (formaldehyde), HCOOH (formic acid) and N2O (nitrous oxide) were also measured in order to determine the MIR (maximum incremental reactivity) of the gaseous emissions. Pollutants were measured without the DOC (diesel oxidation catalyst) to gather data about raw emissions. When the low pressure EGR system was used, decreases in NOX, N2O and fuel consumption were observed and significant increases HC, CO and unregulated emissions; this is the result of a lower intake manifold temperature, which provides a higher gas density which modifies the combustion process. The potential of tropospheric ozone production was higher in all cases when the low pressure EGR was used. © 2011 Elsevier Ltd.Bermúdez, V.; Luján, JM.; Pla Moreno, B.; Linares Rodríguez, WG. (2011). Effects of low pressure exhaust gas recirculation on regulated and unregulated gaseous emissions during NEDC in a light-duty diesel engine. Energy. 36(9):5655-5665. doi:10.1016/j.energy.2011.06.061S5655566536

What's the harm in moonlighting? A qualitative survey on the role conflicts of freelance journalists with secondary employment in the field of PR

There seems to be an internationally shared consensus on the ethical norm that journalists may not moonlight' for PR since this might conflict with their commitment to autonomy, truth, neutrality and objectivity. However, there is a gap between the normative demands on freelance journalists and the reality of their occupation: The changing world of professional working conditions is challenging journalists and has led to growing numbers of freelance journalists who also work for PR. Whether or not, and if so how freelance journalists with secondary employment in the field of PR perceive and come to terms with conflicts has not yet been thoroughly examined. This contribution is dedicated to this gap in research and asks how freelance journalists who simultaneously work in the field of PR deal with their fundamentally conflicting roles (journalists' perception of inter-role conflicts; how they cope with inter-role conflicts). We conducted semi-structured guided interviews with 18 freelance journalists simultaneously working for PR clients. Our results show that they are aware of the potential for conflict involved in fulfilling the two roles. All participants are inclined to preserve their professional self-concept as journalists, with regard to which the coping strategies of marginalization and merging roles are particularly indicative