Search results for "flame"
showing 8 items of 108 documents
Halloysite Nanotubes/Perfluoroctanote: an efficient consolidant and flame retardant for paper
2014
Screening of halogenated aromatic compounds in some raw material lots for an aluminium recycling plant
2004
Four samples of scrap raw materials for an aluminium recycling plant were screened for the occurrence of persistent halogenated aromatic compounds. The samples contained waste from handling of electric and electronic plastics, filter dust from electronic crusher, cyclone dust from electronic crusher and light fluff from car shredder. In our screening analyses, brominated flame retardants were observed in all samples. Polybrominated diphenyl ethers (PBDE) were identified in all samples in amounts of 245–67450 ng/g. The major PBDE congeners found were decabromo- and pentabromodiphenyl ethers. 1,1-bis(2,4,6-tribromophenoxy)ethane, hexabromobenzene, ethyl-pentabromobenzene, tetrabromobisphenol-…
Magnetic Field Control of Combustion Dynamics
2016
Abstract Experimental studies and mathematical modelling of the effects of magnetic field on combustion dynamics at thermo-chemical conversion of biomass are carried out with the aim of providing control of the processes developing in the reaction zone of swirling flame. The joint research of the magnetic field effect on the combustion dynamics includes the estimation of this effect on the formation of the swirling flame dynamics, flame temperature and composition, providing analysis of the magnetic field effects on the flame characteristics. The results of experiments have shown that the magnetic field exerts the influence on the flow velocity components by enhancing a swirl motion in the …
Zīmola loma kosmētikas izvēlē: "Avon" un "Oriflame" piemēru analīze
2016
Bakalaura darba tēma ir zīmola loma kosmētikas izvēlē “AVON” un “ORIFLAME” piemēru analīze. Darba mērķis - izpētīt zīmola lomu, izmantojot konkrēto zīmolu piemērus. Darba uzdevumi: 1.Izpētīt un analizēt zīmola būtību un patērētāju uzvedību; 2.Veikt kvantitatīvo pētījumu ar aptaujas palīdzību, kur, izpētīta patērētāju kosmētikas izvēles paradumus un zīmola loma tajā, kā arī pārbaudīt uzņēmumu atpazīstamību un vizuālo tēlu; 3.Veikt kvalitatīvu pētījumu, izmantojot interviju ar uzņēmuma pārstāvjiem, lai izprastu uzņēmuma zīmola būtību un virzību; 4.No iegūtajiem pētījuma datiem, izdarīt secinājumus un izprast patērētāju uzvedību. Darba teorētiskā daļa tiek veidota, pamatojoties uz daudzpusīgu …
SparseHC: A Memory-efficient Online Hierarchical Clustering Algorithm
2014
Computing a hierarchical clustering of objects from a pairwise distance matrix is an important algorithmic kernel in computational science. Since the storage of this matrix requires quadratic space with respect to the number of objects, the design of memory-efficient approaches is of high importance to this research area. In this paper, we address this problem by presenting a memory-efficient online hierarchical clustering algorithm called SparseHC. SparseHC scans a sorted and possibly sparse distance matrix chunk-by-chunk. Meanwhile, a dendrogram is built by merging cluster pairs as and when the distance between them is determined to be the smallest among all remaining cluster pairs. The k…
Control of the Development of Swirling Airflow Dynamics and Its Impact on Biomass Combustion Characteristics
2017
Abstract The development of the swirling flame flow field and gasification/ combustion dynamics at thermo-chemical conversion of biomass pellets has experimentally been studied using a pilot device, which combines a biomass gasifier and combustor by varying the inlet conditions of the fuel-air mixture into the combustor. Experimental modelling of the formation of the cold nonreacting swirling airflow field above the inlet nozzle of the combustor and the upstream flow formation below the inlet nozzle has been carried out to assess the influence of the inlet nozzle diameter, as well primary and secondary air supply rates on the upstream flow formation and air swirl intensity, which is highly …
"Kulttuurinen kiinnostus heräsi tanssiharrastukseni myötä" : flamenco, itämainen tanssi ja länsiafrikkalaiset tanssit tanssinopettajien ja -harrastaj…
2013
Flame-Retardant and Tensile Properties of Polyamide 12 Processed by Selective Laser Sintering
2022
This research was funded by the European Regional Development Fund within Measure 1.1.1.1 “Industry-Driven Research” of the Specific aid objective 1.1.1 “To increase the research and innovation capacity of scientific institutions of Latvia and their ability to attract external funding by investing in human resources and infrastructure” of the Operational Program “Growth and Employment” (Project No. 1.1.1.1/19/A/143). A.S. and A.Z. are grateful to funding received from the European Union Horizon 2020 Framework programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2.