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Abstract: Black carbon is one of the riskiest particle matter pollutants that is harmful to human health. Although it has been increasingly investigated, factors that depend on black carbon distribution and concentration are still insufficiently researched. Variables, such as traffic density, wind speeds, and ground levels can lead to substantial variations of black carbon concentrations and potential exposure, which is even riskier for people living in less-airy sites. Therefore, this paper "fills the gaps" by studying black carbon distribution variations, concentrations, and oscillations, with special emphasis on traffic density and road segments, at multiple locations, in a small city located in a basin, with frequent temperature inversions and infrequent low wind speeds. As wind speed has a significant impact on black carbon concentration trends, it is critical to present how low wind speeds influence black carbon dispersion in a basin city, and how black carbon is dependent on traffic density. Our results revealed that when the wind reached speeds of 1 ms-1 , black carbon concentrations actually increased. In lengthy wind periods, when wind speeds reached 2 or 3 ms-1 , black carbon concentrations decreased during rush hour and in the time of severe winter biomass burning. By observing the results, it could be concluded that black carbon persists longer in higher altitudes than near ground level. Black carbon concentration oscillations were also seen as more pronounced on main roads with higher traffic density. The more the traffic decreases and becomes steady, the more black carbon concentrations oscillate.
Keywords: black carbon, black carbon concentration, traffic pollution, air pollution, wind, traffic density, logistics, basin city
Published in DKUM: 20.08.2024; Views: 44; Downloads: 9
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Abstract: Embalaža ima v logistiki zelo pomembno vlogo, saj je neposredno povezana s proizvodi, še posebej v trgovski in živilski dejavnosti. Embalaža varuje izdelke pred negativnimi zunanjimi vplivi, hkrati pa tudi omogoča lažjo manipulacijo izdelkov in pomaga pri premagovanju najrazličnejših ovir na poti od proizvajalca do končnega uporabnika. Podjetja morajo imeti zelo dobro organiziran sistem, s pomočjo katerega je točno določeno kje, kako in kdaj se bo embalaža uporabljala in po opravljenih funkcijah sortirala. V diplomskem delu smo predstavili področje embalaže v logističnem centru podjetja Engrotuš d. o. o., ki velja za eno izmed največjih slovenskih trgovskih podjetij. Spoznali in predstavili smo trenutno stanje na področju embalaže v povezavi s procesom komisioniranja, ga analizirali in podali predloge rešitve izpostavljenih problemov. S predlaganimi rešitvami smo komisionarjem omogočili bolj tekoče delo, hkrati pa tudi povečali kakovost izdanih izdelkov iz skladišča oziroma logističnega centra.
Keywords: embalaža, povratna logistika, terciarna embalaža, STECO zaboj
Published in DKUM: 22.11.2016; Views: 1371; Downloads: 154
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