Browsing by Author "Mohrová, Jana"
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- ItemAnalýza spotřeby šicí nitě(Technická Univerzita v Liberci, 2008) Sokalová, Eva; Mohrová, JanaTato bakalářská práce se zabývá analýzou spotřeby šicích nití. V teoretické části je nejprve zpracována rešerše zaměřená na tuto problematiku a poté jsou zde popsány faktory ovlivňující spotřeby šicích nití. V praktické části pak následuje výběr vhodných materiálů pro experiment analýza spotřeby šicích nití. Tyto materiály mají podobné vlastnosti a parametry. Hlavním faktorem, kterým se od sebe odlišují, je materiálové složení. Oba materiály jsou prošity ve stejných vrstvách se stejnou délkou stehu. Měření je provedeno praktickým a teoretickým způsobem a je porovnáno mezi sebou. Poté je výsledek z praktické analýzy spotřeby šicích nití u obou materiálů taktéž porovnán a formulován v závěrečné doporučení.
- ItemDifferent Structures of PVA Nanofibrous Membrane for Sound Absorption Application(Hindawi Publishing Corporation, 2012) Mohrová, Jana; Kalinová, KláraThe thin nanofibrous layer has different properties in the field of sound absorption in comparison with porous fibrous material which works on a principle of friction of air particles in contact with walls of pores. In case of the thin nanofibrous layer, which represents a sound absorber here, the energy of sonic waves is absorbed by the principle of membrane resonance. The structure of the membrane can play an important role in the process of converting the sonic energy to a different energy type. The vibration system acts differently depending on the presence of smooth fibers in the structure, amount of partly merged fibers, or structure of polymer foil as extreme. Polyvinyl alcohol (PVA) was used as a polymer because of its good water solubility. It is possible to influence the structure of nanofibrous layer during the production process thanks to this property of polyvinyl alcohol.
- ItemRuční výroba papíru(Technická Univerzita v Liberci, 2007) Mohrová, Jana; Lukáš, DavidThe thesis describes development of hand-made paper technology and use this technology in restoring books. The theoretic parts of the thesis foreshadows paper production in separate epochs of our history and at the same time it talks about one of possible mode used for restoring books at the present time. The next part deals with experiment, where possible changes in strength properties of paper in dependence on applied vibration by self productions are examined. The thesis deals also with an idea to strengthen the paper owing to vibration application on wet layer of fibers, which is at the same time main objectives of this thesis. This part of thesis discusses changes of strength properties of paper at stress in dry and wet state, in consequence of applied vibrations. At the same time the thesis discusses about the application of vibration method for restoring books.
- ItemRuční výroba papíruMohrová, Jana
- ItemVývoj studijních oborů na SPŠ textilní v LiberciMohrová, Jana
- ItemVývoj studijních oborů na SPŠ textilní v Liberci(Technická Univerzita v Liberci, 2008) Mohrová, Jana; Vacek, JiříThe thesis describes development of fields of study at the secondary technical school for textile technology in Liberec from the beginning to present time of school. At the same time this thesis foreshadows development of textile productions in region of Liberec and it foreshadows political and economic situation at separate time of school living. The first parts of the thesis brings near effect of technological expansion in sphere of textile productions to subject and form study of the textile school. Afterwards it tries to catch effect of economic and political situation to subject of this school at the separate time. The thesis deals also with an idea to catch of development of fields of study at the textile school in light of presented indicators, which is at the same time main objectives of this thesis. It was find in historic documents that technological expansion and political and economic situation have an effect to development of fields of study this school. We must assume that development of school is depending to changes of indicators in the future.