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ELECTRON BEAM REMELTING OF PLASMA SPRAYED ALUMINA COATINGS
Matějíček, Jiří ; Veverka, J. ; Čížek, J. ; Kouřil, J.
Plasma sprayed alumina coatings find numerous applications in various fields, where they enhance the properties of the base material. Examples include thermal barriers, wear resistance, electrical insulation, and diffusion and corrosion barriers. A typical structure of plasma sprayed coatings, containing a multitude of voids and imperfectly bonded interfaces, gives them unique properties - particularly low thermal conductivity, high strain tolerance, etc. However, for certain applications such as permeation barriers or wear resistance, these voids may be detrimental.\nThis paper reports on the first experiments with remelting of plasma sprayed alumina coatings by electron beam technology, with the purpose of densifying the coatings and thereby eliminating the voids. Throughout the study, several parameters of the e-beam device were varied - beam current, traverse velocity and number of passes. The treated coatings were observed by light and electron microscopy and the thickness, structure and surface morphology of the remelted layer were determined and correlated with the process parameters. Based on the first series of experiments, the e-beam settings leading to dense and smooth remelted layer of sufficient thickness were obtained. In this layer, a change of phase composition and a marked increase in hardness were observed.\n
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The leveling of the newly stabilized elevation points in RA Detmarovice in 2016
Kajzar, Vlastimil ; Waclawik, Petr ; Staš, Lubomír
In the northern area of mining areas Doubrava and Karvina mines on the border RA Detmarovice and Doubrava are implemented, the mining activities. For this reason, in order to detect possible effects of the mine to the surface and surface objects twice a year height focuses, points in this area stable. From 2014 he was a contractor for these works chosen by the Institute of Geonics, v.v.i., Ostrava. The measurement results are annually presented in the final report - elevation measurements in the northern area of mining areas Doubrava and Karviná Mines I. In 2016, the existing network of height points in a cadastral municipality Dětmarovice expanded by 11 new points. New points are stabilized by means of steel bench mark on objects. Elevation point near house No. 713 is a stabilized form of measuring support cast-in steel casing
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Pervaporation of Methanol Water Mixtures by PERVAPTM Asymmetric Membranes.
Izák, Pavel ; Kačírková, Marie
The report summarizes the results of experimental testing of pervaporative separation of methanol from methanol-water binary mixture at 35°C. For the separation were chosen the Sulzer´s PERVAPTM membranes. The concentration of methanol was 6.5 wt.% in water, and pervaporation was performed in vacuum mode. Membranes displayed separation properties suitable for industrial separation of methanol from water mixtures.
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Transient and Average Markov Reward Chains with Applications to Finance
Sladký, Karel
The article is devoted to Markov reward chains, in particular, attention is primarily focused on the reward variance arising by summation of generated rewards. Explicit formulae for calculating the variances for transient and average models are reported along with sketches of algorithmic procedures for finding policies guaranteeing minimal variance in the class of policies with a given transient or average reward. Application of the obtained results to financial models is indicated.
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Právní a zdravotně sociální aspekty činnosti OSPOD jako ustanovených opatrovníků v zámu nezletilých dětí
BORSKÁ, Jana
The Czech Republic as a signatory of the Convention on the Rights of the Child has vested the practice of state administration in the field of care for minor children to municipalities with extended powers, where the protection of the rights and legitimate interests of minor children is safeguarded by state authorities of social and legal protection of children (ASLPC hereinafter). These authorities are incorporated to the extent laid down by the Act on Social and Legal Protection of Children (Act No 359/1999 Coll., as amended). The position and roles of ASLPC and their competence and jurisdiction are also regulated by the same act. The position of workers of these authorities and its legal embodiment is equally important. Regarding professionality, there are high demands on these workers. In the Czech Republic, significant changes in legislature have been made over the past three years. These amendments have led to the strengthening of the rights of minor children and to the establishing of new tools for their protection. In connection with the adoption of new substantive regulation of family law, which is now exhaustively dealt with by the Act No 89/2012 Coll., the Civil Code, new procedural rules have been established regarding protection of rights of minor children. Such procedural legislation includes (apart from the long-existent Act No. 99/1963, the Code of Civil Procedure) the Act No 292/2013 Coll., on Special Civil Proceedings. The decision-making regarding minor children has been vested mainly by the state into the competence of courts. The courts appoint the locally relevant ASLPC as a guardian who then represents the interests of minor children. The purpose, interwoven with and derived from the first one, was to explore the opinions of selected social workers of ASLPC and of district court judges regarding the defined problems occurring during the work of ASLPCs and courts while protecting the interests of minor children. These particularly include: the use of the tool of precautionary measure; problems of different territorial jurisdiction of courts and ASLPCs; processing of complaints regarding bias in various phases of the proceedings; professional training of workers of ASLPC It is evident from the proposals of both judges and ASLPC workers that it is necessary to unify territorial jurisdiction. The courts are suggesting the priority criterion of the address where the child mainly resides. ASLPC workers suggest the official permanent residence as the prime criterion. Bias causes problems in all phases of proceedings. It is obvious that courts take differing approaches towards the solution of this problem (some courts solve the problem of bias complaints filed by the parties while other courts do not) and for ASLPC workers it is difficult to assess how to act when such complaint is raised against them. The training of ASLPC workers - workers are obliged to educate themselves and their employer is obliged to finance such training. Not all ASLPCs are able to provide training in the required extent - due to financial reasons (the average costs of education of one employee pose from 9,169 to 13,400 CZK annually and they cover approximately 6 days of training). The heavy work-load caused by insufficient numbers of ASLPC employees prevents them from completing such compulsory training. As part of the examination of the "participation of a collision guardian in court proceedings" it has been found out that irregular participation of the worker in the proceedings (absence from participation in appeals proceedings); incomplete reports (directed to courts) from surveys in families. Based on comprehensive examination of the problems of territorial jurisdiction, it was recommended that requests are independently recorded and financial compensation is provided for ASLPCs who are requested to represent minors in front of courts, to draft proposals for precautionary measures.
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Book of abstracts. International symposium on experimental methods and numerical simulation in engineering sciences 2016
Kytýř, Daniel ; Zlámal, Petr ; Jiroušek, O.
The International Symposium on Experimental Methods and Numerical Simulation in Engineering Sciences continues the tradition of the Czech-German bilateral symposium founded by prof. Karl-Hans Laermann and prof. Stanislav Holý in 1985. In the following years, the symposium was extensively developed by prof. Josef Jíra. The symposium shall bring together mainly young scientists who are actively involved in experimental solid mechanics, theoretically and practically, in order to exchange experience, to report on the present state-of-art as well as on running research projects, to discuss due questions and problems and to promote the co-operation between individuals as well as between institutions. Therefore in the symposium discussions will play a highly significant role.
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XIVth Youth symposium on Experimental Solid Mechanics
Major, Z. ; Kytýř, Daniel
The Youth Symposium on Experimental Solid Mechanics traditionally brings together young researchers and engineers, students and PhD students, who are actively involved in the experimental solids mechanics, theoretically and practically, in order to exchange their experience, to report on the present state-of-art as well as on running research projects, to discuss due questions and problems and to promote the cooperation among individuals as well as among institutions. The XIVth symposium continues both, the long tradition of this conference series and introduces novel elements. The combination of the experimental mechanics with modern numerical methods was focused. This year, participants from 12 countries attended the symposium. Based on their presentations, 19 papers were selected for the publication in this issue of Acta Polytechnica CTU Proceedings.
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BUT Digital Library – Introduction of Institutional Repository
Skůpa, Jan
The Brno University of Technology (BUT) Digital Library is an institutional repository running of DSpace (version 5.3) initially created in 2007 as a repository for theses. The Digital Library‘s range of services is gradually growing and this paper deals specifi cally with repository services, the process for publishing theses, and support for open access. The repository enables authors to store the research results in open access mode. Full text is integrated into the national Czech systems for reporting publications (RIV).
Fulltext: idr-1038_1 -  PDF; idr-1038_2 - PDF
Slides: idr-1038_3 - PDF; idr-1038_4 - PDF
Video: idr-1038_5 -  MP4
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