In the traditional definition of Dung’s abstract argumentation framework (AF ), the notion of attack is understood as a relation between arguments, thus bounding attacks to start from and be directed to arguments. This paper introduces a generalized definition of abstract argumentation framework called AFRA (Argumentation Framework with Recursive Attacks), where an attack is allowed to be direc...

J. Hampl, B. Smetana, VŠB-TU Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic J. Odehnal, PILSEN STEEL, s.r.o., Pilsen, Czech Republic The paper analyzes the technological parameters, micro-purity and mechanical properties of castings of steel alloyed with calcium. The effect of calcium on the steel was analyzed on samples taken in the process of casting heavy castings a...

this study was conducted in order to evaluate the effects of long term ageing on toughness andresilient modulus of asphalt concrete mixtures containing electric arc and basic oxygen furnacesteel slags. after initial evaluation of the properties of steel slags using x-ray diffraction andscanning electric microscope, eleven sets of laboratory mixtures were prepared. each set wastreated replacing ...

Antioxidant activities of wampee peel extracts using five different solvents (ethanol, hexane, ethyl acetate, butanol and water) were determined by using in-vitro antioxidant models including total antioxidant capability, 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging activity, reducing power, and superoxide scavenging activity. Ethyl acetate fraction (EAF) exhibited the highest antio...

Abstract This paper presents a comprehensive model of an industrial electric arc furnace (EAF) that is based upon several rigorous first-principles submodels the heat exchange in EAF and practical experience from melt shop. The suited for process simulation, optimization, control applications. It assumes energy demand satisfied by six sources, arc, oxy-fuel burners, oxygen lances, combustion co...

In the present study, we compared two strains of serotypes O88:H25 and O145:H45 with an enteropathogenic Escherichia coli (EPEC) adherence factor-positive (EAF+) strain of the classic enteropathogenic E. coli serotype O111ab:H2 for their association with HeLa cells and with biopsies of human duodenal mucosa. Both strains not belonging to the classic EPEC serotype showed virulence properties sim...

Epilepsy with Auditory Features (EAF) is a focal epilepsy syndrome mainly of unknown aetiology. LGI1 and RELN have been identified as the main cause Autosomal Dominant EAF anecdotally reported in non-familial cases. Pathogenic variants SCN1A DEPDC5 also described few probands belonging to families heterogeneous phenotypes incomplete penetrance. We aimed estimate contribution these genes disorde...

Electric arc furnace slag (EAFS) and electric dust (EAFD) are the waste materials from steel production by EAF route which implies remelting of iron scrap in furnaces (EAF). In recent years, special attention is paid on valorisation EAFS EAFD since disposing both may cause negative impacts environment. this paper, methods that use to process have been reviewed, their advantages disadvantages al...

Approximately 60–70% of the direct greenhouse gas emissions in electric arc furnace (EAF) steelmaking originate from use fossil carbon charge during melting steel scrap. Regarding short-term solutions to mitigate climate impact steelmaking, there is greater potential replace with renewable EAF than integrated blast where mechanical strength requirements on are too demanding. Therefore, present ...