Alternative to the Conventional Heating and Cooling Systems in Public Buildings

The paper presents an alternative system for heating and cooling in public buildings. The system was designed for the retrofitted building of the Slovene Ethnographic Museum (SEM) where it was also extensively tested. The installed system includes radiant wall mounted panels for heating and cooling, localized automated tangential fans for cooling and ventilation and a centralized building management system for the regulation and supervision of the performance. The efficiency of the system was thoroughly investigated through a series of experiments conducted prior to the renovation of the building as well as after the museum was put into service. The application of the described system resulted in substantial reduction of energy consumption, better internal thermal conditions and lower investment costs for the Heating, Ventilation and Air Conditioning (HVAC) system of the entire building. (C)2010 Journal of Mechanical Engineering. All rights reserved

Applications of copper slag in the construction sector

Copper slags generated during the primary copper smelting have, due to its favorable mineralogical and chemical composition, several possible end uses in the resource demanding construction sector. Copper slags are made via two different processing methods; slow air cooling or water granulation. Air cooling results in final well crystalline and dense product, which is used usually as coarse aggregates in the building sector, however, water granulation results in a sand-like material with a high quantity of amorphous phase. The present paper gives and overview of the recent reports and good practices in the utilization of these slags, including also some drawbacks and potential issues in a certain type of copper slag, either air cooled or granulated and could serve as a guideline for selecting the most promising applications in the construction sector

Smernice diagnostike in zdravljenja raka dojk (2.del)

no abstractni abstrakt

Smernice diagnostike in zdravljenja raka dojk: 1. del

no abstractni abstrakt

Teachers' awareness regarding public speaking

Teacher do many speaking appearances, therefore they have to consciously develop their ability of effective speaking appearances. It is expected that the teacher is a good speaker, that he knows how to provide content, draw attention and to quicken interest. Knowledge on speaking appearance contributes to the improvement and upgrade of this skill. In the theoretical part of the thesis I have defined rhetoric, speaking appearances and factors that impact the successfulness of the speaking appearance. I have presented phases of monologue texts formation, characteristics of verbal and non-verbal communication, care for a healthy voice, stage fright and its overcoming. In the empirical part we have analyzed, what knowledge on speaking appearances have classroom teachers. The sample covered 101 teachers. Besides class teaching, teachers most often do speaking appearances on the parent-teacher meeting. Their knowledge differs depending on the specific field. They assess their knowledge of speaking appearances as well. The number of their teaching years does not affect their knowledge. Differences in knowledge appeared regarding the university they have attended. Teachers, who attended additional training from the fields of rhetoric or speaking appearances, have more knowledge than teachers, who did not attend it. According to teachers opinion, good preparation is most important for successful speaking appearances

Alternative to the Conventional Heating and Cooling Systems in Public Buildings

The paper presents an alternative system for heating and cooling in public buildings. The system was designed for the retrofitted building of the Slovene Ethnographic Museum (SEM) where it was also extensively tested. The installed system includes radiant wall mounted panels for heating and cooling, localized automated tangential fans for cooling and ventilation and a centralized building management system for the regulation and supervision of the performance. The efficiency of the system was thoroughly investigated through a series of experiments conducted prior to the renovation of the building as well as after the museum was put into service. The application of the described system resulted in substantial reduction of energy consumption, better internal thermal conditions and lower investment costs for the Heating, Ventilation and Air Conditioning (HVAC) system of the entire building. (C)2010 Journal of Mechanical Engineering. All rights reserved

Detoxified spent pot lining from aluminum production as (alumino-)silicate source for composite cement and autoclaved aerated concrete

New sources of supplementary cementitious materials (SCMs) are needed to meet the future demand. A potential new source of SCM is spent pot lining, a residue from aluminum production. The present work showed that the refined aluminosilicate part of spent pot lining (SPL) has a moderate chemical reactivity in a cementitious system measured in the R3 calorimetry test, comparable to commercially used coal fly ash. The reaction of SPL led to the consumption of Ca(OH)2 in a cement paste beyond 7 days after mixing. At 28 and 90 days a significant contribution to strength development was therefore observed, reaching a relative strength, which is similar to composite cements with coal fly ash. At early age a retardation of the cement hydration is caused by the SPL, which should most likely be associated with the presence of trace amounts of NH3. The spent pot lining is also investigated as silica source for autoclaved aerated concrete blocks. The replacement of quartz by spent pot lining did not show an adverse effect on the strength-density relation of the lightweight blocks up to 50 wt% quartz substitution. Overall, spent pot lining can be used in small replacement volumes (30 wt%) as SCM or as replacement of quartz (50 wt%) in autoclaved aerated concrete blocks