Socializace romských dětí ve škole

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Production design of gas analyzer body using Direct metal laser sintering method

Tato diplomová práce se zabývá možností výroby plynového analyzátoru technologií Rapid Prototyping a to metodou Direct Metal Laser Sintering. V teoretické části je popsána stávající výroba součásti ve společnosti Frentech Aerospace s.r.o a inovace ve firmě Innomia a.s, metodou Direct Metal Laser Sintering. Dále je proveden rozbor principu jednotlivých metod Rapid Prototyping, především metody Direct Metal Laser Sintering. Cílem experimentální části je porovnání mechanických vlastností a struktur materiálu, klasické metalurgie a práškové metalurgie. Součástí diplomové práce je technicko-ekonomické zhodnocení, které porovnává výrobu strojního dílu konvenční a moderní aditivní technologii.This master’s thesis deals with the possibility of manufacturing gas analyzer by Rapid Prototyping Technology and it with the method Direct Metal Laser Sintering. The theoretical part describes the current production of component in the Frentech Aerospace LLC and innovation with the DMSL method in the company Innomia Furthermore JSC. Then an analysis of the principle of single methods Rapid Prototyping, especially the method of Direct Metal Laser Sintering, is implemented. The aim of the experimental part is to compare the mechanical properties and material structures, conventional metallurgy and powder metallurgy. The thesis also contains a technical-economic evaluation comparing the manufacture of mechanical part by conventional and advanced additive technology.

Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers

First multilocus analysis of the largest Neotropical cichlid genus Crenicichla combining mitochondrial (cyt. b, ND2, 16S) and nuclear (S7 intron 1) genes and comprising 602 sequences of 169 specimens yields a robust phylogenetic hypothesis. The best marker in the combined analysis is the ND2 gene which contributes throughout the whole range of hierarchical levels in the tree and shows weak effects of saturation at the 3rd codon position. The 16S locus exerts almost no influence on the inferred phylogeny. The nuclear S7 intron 1 resolves mainly deeper nodes. Crenicichla is split into two main clades: (1) Teleocichla, the Crenicichla wallacii group, and the Crenicichla lugubris- Crenicichla saxatilis groups (" the TWLuS clade"); (2) the Crenicichla reticulata group and the Crenicichla lacustris group- Crenicichla macrophthalma (" the RMLa clade"). Our study confirms the monophyly of the C. lacustris species group with very high support. The biogeographic reconstruction of the C. lacustris group using dispersal-vicariance analysis underlines the importance of ancient barriers between the middle and upper Paraná River (the Guaíra Falls) and between the middle and upper Uruguay River (the Moconá Falls). Our phylogeny recovers two endemic species flocks within the C. lacustris group, the Crenicichla missioneira species flock and the herein discovered Crenicichla mandelburgeri species flock from the Uruguay and Paraná/Iguazú Rivers, respectively. We discuss putative sympatric diversification of trophic traits (morphology of jaws and lips, dentition) and propose these species flocks as models for studying sympatric speciation in complex riverine systems. The possible role of hybridization as a mechanism of speciation is mentioned with a recorded example (Crenicichla scottii).Museo de La Plat

Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers

First multilocus analysis of the largest Neotropical cichlid genus Crenicichla combining mitochondrial (cyt. b, ND2, 16S) and nuclear (S7 intron 1) genes and comprising 602 sequences of 169 specimens yields a robust phylogenetic hypothesis. The best marker in the combined analysis is the ND2 gene which contributes throughout the whole range of hierarchical levels in the tree and shows weak effects of saturation at the 3rd codon position. The 16S locus exerts almost no influence on the inferred phylogeny. The nuclear S7 intron 1 resolves mainly deeper nodes. Crenicichla is split into two main clades: (1) Teleocichla, the Crenicichla wallacii group, and the Crenicichla lugubris- Crenicichla saxatilis groups (" the TWLuS clade"); (2) the Crenicichla reticulata group and the Crenicichla lacustris group- Crenicichla macrophthalma (" the RMLa clade"). Our study confirms the monophyly of the C. lacustris species group with very high support. The biogeographic reconstruction of the C. lacustris group using dispersal-vicariance analysis underlines the importance of ancient barriers between the middle and upper Paraná River (the Guaíra Falls) and between the middle and upper Uruguay River (the Moconá Falls). Our phylogeny recovers two endemic species flocks within the C. lacustris group, the Crenicichla missioneira species flock and the herein discovered Crenicichla mandelburgeri species flock from the Uruguay and Paraná/Iguazú Rivers, respectively. We discuss putative sympatric diversification of trophic traits (morphology of jaws and lips, dentition) and propose these species flocks as models for studying sympatric speciation in complex riverine systems. The possible role of hybridization as a mechanism of speciation is mentioned with a recorded example (Crenicichla scottii).Museo de La Plat

First record of Rineloricaria reisi, R. stellata and R. zaina (Siluriformes: Loricariidae) from the Río Uruguay basin in Argentina

Rineloricaria reisi, R. stellata, and R. zaina are registered for the first time in freshwaters of Argentina. These three species were found in the Río Uruguay basin in Misiones Province. As a result of these findings, five species of Rineloricaria are found in the Río Uruguay basin in Argentina. A key of Rineloricaria species from that basin is also provided

First record of Rineloricaria reisi, R. stellata and R. zaina (Siluriformes: Loricariidae) from the Río Uruguay basin in Argentina

Rineloricaria reisi, R. stellata, and R. zaina are registered for the first time in freshwaters of Argentina. These three species were found in the Río Uruguay basin in Misiones Province. As a result of these findings, five species of Rineloricaria are found in the Río Uruguay basin in Argentina. A key of Rineloricaria species from that basin is also provided.Facultad de Ciencias Naturales y Muse

First records of <i>Characidium heirmostigmata</i> and <i>C. serrano</i> (Characiformes: Crenuchidae) from freshwaters of Argentina

Characidium heirmostigmata and C. serrano are registered for the first time in freshwaters of Argentina in the province of Misiones. Characidium heirmostigmata was found in the middle río Paraná basin and C. serrano in upper and middle río Uruguay basin.Facultad de Ciencias Naturales y Muse

First record and supplementary description of Leporinus amae Godoy, 1980 (Characiformes: Anostomidae) from freshwaters in Argentina

Leporinus amae is only known from its type locality the Rio Apuaê in Brazil, a tributary of the Río Pelotas, Río Uruguay Basin. The original description of this species was mainly based on one specimen lacking intraspecific variation in meristic and morphometric of most characters. We report the first record of Leporinus amae from the río Uruguay basin in Argentina and give a supplementary description of the species.Fil: Almirón, Adriana Edith. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; ArgentinaFil: Casciotta, Jorge Rafael. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; ArgentinaFil: Bruno, María Cecilia. Universidad Nacional de La Plata. Centro Regional de Estudios Genómicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Piálek, Lubomír. University of South Bohemia; República ChecaFil: Doubnerová, Klára. University of South Bohemia; República ChecaFil: Říčan, Oldřich. University of South Bohemia; República Chec

First record of Gymnogeophagus lipokarenos Malabarba, Malabarba & Reis, 2015 (Teleostei: Cichliformes) from Argentina

Gymnogeophagus lipokarenos is registered for the first time from Argentina in the Province of Misiones. The species was originally described as endemic to the Upper Uruguay freshwater ecoregion in Brazil. Our findings extend its distribution into the Lower Uruguay ecoregion throughout the province of Misiones.Facultad de Ciencias Naturales y Muse

Rediscovery of <i>Crenicichla yaha</i> (Teleostei: Cichlidae)

Crenicichla yaha was described from the Urugua-í river (arroyo Urugua-í; and erroneously on one specimen from the Rio Iguazú) in Misiones, Argentina. The species was only known from nine specimens collected in 1986 during an environmental impact study prior to the construction of the Urugua-í hydroelectric dam in 1989. The species has not been collected since and is absent from the artificial lake where ecological conditions have been severely altered and where the diversity and biomass of non-native species are on the increase. We report here the rediscovery of Crenicichla yaha in the Urugua-í basin based on nine specimens collected in December 2016 at two localities outside the influence of the artificial lake. The species is distinct (especially in live coloration) from Crenicichla tesay which was previously treated as conspecific with it or confused with it. Crenicichla yaha is endemic to the Urugua-í river basin, while Crenicichla tesay is endemic to the Iguazú river basin. The original description of Crenicichla yaha was based on long preserved specimens lacking most coloration patterns. We expand the description and diagnosis of the species with the now known coloration patterns based on live specimens including breeding coloration and rediagnose the species by comparisons with the remaining closely related species of the C. mandelburgeri species group which were not known at the time of the original description of C. yaha.Facultad de Ciencias Naturales y Muse