Abstract
In the Middle East, desert dust is assumed to dominate air pollution, being in permanent violation of public health guidelines. Here we present ship-borne measurements from around the ...Arabian Peninsula and modeling results to show that hazardous fine particulate matter is to a large extent of anthropogenic origin (>90%), and distinct from the less harmful, coarse desert dust particles. Conventionally, it was understood that desert dust dominates both the fine and coarse aerosol size fractions, which obscures the anthropogenic signal. We find that the annual excess mortality from the exposure to air pollution is 745 (514-1097) per 100,000 per year, similar to that of other leading health risk factors, like high cholesterol and tobacco smoking. Furthermore, anthropogenic pollution particles account for a major part (~53%) of the visible aerosol optical depth. Therefore, in the Middle East anthropogenic air pollution is a leading health risk and an important climatic factor.
Cilj ovog rada jest analiza izvještavanja o društveno odgovornom poslovanju (DOP) revizorskih društava u Hrvatskoj koja revidiraju godišnje financijske izvještaje subjekata od javnog interesa čiji su ...vrijednosni papiri uvršteni na Zagrebačku burzu. S obzirom na to da u literaturi postoji nedostatak teorijskih, ali i empirijskih saznanja o odnosu između revizije i DOP-a, svrha je ovog istraživanja utvrditi u kojoj mjeri revizorska društva u Hrvatskoj izvještavaju o DOP-u, koje su domene DOP-a u fokusu izvještavanja te postoji li razlika u izvještavanju o DOP-u među revizorskim društvima, s obzirom na pripadnost Velikoj četvorci i međunarodnoj mreži. Na temelju dobivenih rezultata može se zaključiti da postoji značajna razlika u praksi izvještavanja o poduzetim aktivnostima iz područja DOP-a u promatranim revizorskim društvima. Prosječna vrijednost Indeksa izvještavanja o DOP-u značajno je veća kod revizorskih društava koja pripadaju Velikoj četvorci, kao i kod revizorskih društava koja pripadaju međunarodnoj mreži.
Airborne carbon monoxide (CO) measurements based on Quantum cascade Laser infrared Absorption Spectroscopy (QLAS) were performed on the German High-Altitude Long-range Observatory (HALO) aircraft ...during test flights in January 2015. Here we investigate the in-flight stability of TRISTAR (TRacer In-Situ Tdlas for Atmospheric Research), a multilaser QLAS instrument for the detection of tropospheric CO, methane and formaldehyde (HCHO). During one test flight the instrument was probed with tank air to measure a constant mixing ratio of CO and zero air for HCHO. Here we investigate the instrument stability for the CO channel of TRISTAR and identify potential noise sources as well as environmental processes that limit the stability of the instrument. The 1
σ
reproducibility of the constant CO measurement yields a value of 1.2% (2.9 ppb
v
) corresponding to an optical density limit of 0.001 for a 5-s average. The CO precision is ultimately limited by an etalon fringe originating from the double corner-cube White cell, whose phase and amplitude changes with the aircraft heading.
The author presents a study on the meaning of duration and time in Bergson’s works Durée et simultanéité and Essai sur les données immédiates de la conscience. It explains Bergson’s concept of the ...theory of relativity and the difficulties related to it, such as: the theory of relativity’s meaning of coincidence and intuitive or absolute coincidence; difficulties regarding supporting systems, problems of single time and multiple times, real time and symbolic or conventional time. In this sense some important thoughts are emphasized regarding the discussion between Bergson and Einstein, held on 6th April 1922. It concludes with a brief overview of the evaluations and discussions that accompanied Bergson’s explanation of the theory of relativity.
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