National Repository of Grey Literature 39 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Microclimate in classrooms and lecture halls throughout the year and its impact on health and focus of students
Malinda, Martin ; Zíková, Naděžda (advisor) ; Mašková, Ludmila (referee)
There is a growing evidence that thermal comfort, light levels and carbon dioxide concentration can have significant impact on alertness and performance. We have documented microclimate (temperature, relative humidity, light intensity level and CO2 concentration) in 7 different lecture rooms throughout the year. We have not measured any extreme conditions but on significant amount of lectures the microclimate conditions were not optimal. Out of 68 measured lectures 2 had median temperature below 19 řC and 13 lectures over 24 řC, i.e. out of the recommended values. On the cold lectures, students were observed to wear jackets and on the hot ones students were frequently opening windows which also suggest that the thermal conditions were suboptimal.. CO2 concentrations were suboptimal mostly in winter, when 26 out of 39 lectures had median CO2 levels above 1000 ppm which is, according to ASHRAE (American Society of Heating Refrigerating and Air-conditioning Engineers), an indicator for inadequate ventilation. Median CO2 level for all lectures from both semesters was 1060 ppm. Even though window opening effectively lowers CO2 concentrations, we found it to be as mostly a reactive behavior. It is very likely that if it would be done proactively, especially CO2 levels could be kept significantly lower. Light...
Characteristic of aerosol particles in indoor environment of different types of libraries and archives
Mašková, Ludmila ; Smolík, Jiří (advisor) ; Hovorka, Jan (referee) ; Barták, Martin (referee)
Aerosol particles are one of the major pollutants in outdoor and indoor air. Particulate matter (PM) can be harmful for works of art by causing soiling and chemical damage, depending on particle size and chemical composition. This study includes indoor/outdoor monitoring of air quality in five archives in the CR, representing different outdoor environments: Zlatá Koruna (rural), Třeboň (small town), Teplice (industrial area), and two archives (National Library - NL and National Archives - NA) in Prague (large city with traffic). The NL and the archives in Zlatá Koruna, Třeboň and Teplice are only naturally ventilated, while NA in Prague is equipped with ventilation and filtration system. The measurements were performed during 4 intensive campaigns in different seasons of the year at every location. The measurements included particle number/mass concentrations, size distributions and chemical composition. Additional measurements were carried out in 2 museums, a depository, and a church. The aim of this study is to investigate concentrations, sources, and chemical composition of PM in the indoor environment, and to establish the relationship between the indoor and outdoor environment. The results showed that concentrations of fine particles in the indoor environment of the NA in Prague were...
Ammonia and Ammonium Nitrate in Archives
Mašková, Ludmila ; Smolík, Jiří ; Ďurovič, M. ; Součková, M.
Ammonia in libraries and archives can damage stored materials such as pigments and metals (Grzywacz, 2006) and mediate microbial decomposition (Petushkova and Lyalikova, 1986). The aim of this study was to investigate concentrations and sources of ammonia in the indoor air of five different types of archives, and to establish the relationship between the indoor and outdoor environments.
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Methodology for selection of tools for mechanical cleaning of dust particles from the paper surface
Benešová, Marie ; Mašková, Ludmila
Cílem této práce bylo identifikovat metody mechanického čištění prachových částic z povrchu papíru, které jsou vhodné pro použití v restaurátorské praxi. Záměrem bylo vytvořit soubor doporučení k výběru vhodné techniky čištění s ohledem především na rozsah a typ znečištění.
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Improving Indoor Air Quality of Libraries and Archives in Order to Significantly Reduce the Degradation of Library and Archival Materials
Součková, M. ; Vávrová, P. ; Novotný, J. ; Dřevíkovská, J. ; Paulusová, H. ; Bartl, B. ; Bartlová, L. ; Bacílková, B. ; Straka, R. ; Ďurovič, M. ; Mašková, Ludmila ; Smolík, Jiří
The aim of the preservation procedure is to improve the indoor air quality in libraries and archives in order to maximally slowed the degradation process of library and archival materials. After identification the degradation risks and determination the indoor air quality will be suggested means for improvement of the indoor air quality, which will limit the degradation of stored library and archive materials.
Effect of Dust on Properties of Collagen Materials.
Součková, M. ; Mašková, Ludmila ; Smolík, Jiří
Samples of collagen materials were exposed to dust for two years in depositories, but the total deposition of particles was very small (approx. 0.1 weight percent). For this reason to another samples of collagen materials were dust particles applied using a bag from nonwoven textile. After the artificial ageing of samples the dust was removed mechanically and properties of collagen materials were investigated.\n\n
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The Effect of Dust Particles on Cellulose Degradation.
Bartl, B. ; Mašková, Ludmila ; Paulusová, H. ; Smolík, Jiří ; Bartlová, L. ; Vodička, Petr
This study focused on the changes in properties of cellulose-based paper Whatman 41, which can take place as a consequence of its contamination by dust particles. The chemical composition and size distribution of dust particles from archival repositories were analysed. After the artificial ageing, the viscosity-average degree of polymerization of cellulose DPv was measured. It was confirmed that cellulose-based paper can undergo substantial changes when contaminated by dust particles and artificially aged. The decrease of the DPv of cellulose showed a negative correlation with the deposited mass of sulfate ions in the dust particles. Considering the particle size fraction, the results suggest the decisive importance of the fine (PM1) particles. \n\n
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Methodology of Assessment of Load of Indoor Environment of Archives and Libraries by Dust Particles.
Mašková, Ludmila ; Smolík, Jiří ; Ondráček, Jakub
The aim of the methodology was development of evaluation methods for indoor air quality in archives and libraries. For this reason a simple passive sampler for dust deposition was developed. For detailed analyse a new aerosol spectrometer was constructed. These measurements should be completed by chemical analyse of particles and than the influence to materials can be estimated.\n
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Methodology of Assessment of Load of Indoor Environment of Archives and Libraries by Dust Particles.
Mašková, Ludmila ; Smolík, Jiří ; Ondráček, Jakub
The aim of the methodology was development of evaluation methods for indoor air quality in archives and libraries, targeted at reduction of damages on library and archival collections caused by adverse effects of environment. For this reason a set of procedures and tools of advanced monitoring of the indoor air quality was developed. The purpose of this methodology was to evaluate load by dust particles, describe the relationship between the indoor and outdoor environments, and identify indoor sources of pollution.
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National Repository of Grey Literature : 39 records found   1 - 10nextend  jump to record:
See also: similar author names
12 MAŠKOVÁ, Lenka
12 Mašková, Lenka
2 Mašková, Linda
1 Mašková, Ljubica
3 Mašková, Lucie
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