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Reactive Nanoparticles Application to SAC 305 Solder Paste
Matras, Jan ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This work is a research on the topic of reactive nanoparticles and their agitation into the solder paste, which it also describes. It describes in detail the properties of each solder alloys. It explains the creation of intermetallic layers in the soldering process and examines their structure. It also focuses on the evaluation and methodology of testing the properties of solder pastes. In the practical part, individual tests are performed with PF606 and PF610 solder paste.
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Rework and Repair Procedures of Selected Components and LED on Various Types of PCBs.
Pospíšil, Tomáš ; Ondřej, Klemš (referee) ; Starý, Jiří (advisor)
This work deals with technology of rework and repairs of electronic soldering assemblies. The work is primarily focused on the rework and repairs of electronic soldering assemblies with the light emitting diode. The theoretical part describes the technological methods of soldering and reworking of electronic assemblies, their diagnostics, evaluation of their influence on reliability and functional properties. The practical part is focused on the real application of technological procedures of rework and repairs, their testing and evaluation. Furthermore there is described and tested the influence of thermal load during soldering on the properties of light emitting diodes.
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Provozní ověření vlivu krmení raného plůdku jeseterovitých ryb obohacenými naupliemi žábronožky na jejich přežití a rychlost růstu
STARÝ, Jakub
The purpose of the experiment was to verify of the influence of enriched artemia salina on the growth and survival of American paddlefish larvae (Polyodon spathula) in operating conditions. The control group was compared with group which was fed by artemia enriched by preparation Red pepper. Control group was fed by nonenriched artemia. This preparation contained increased amount of vitamins A, C, D3 and E, but especially HUFA, mainly DHA (docosahexaenoic acid). The larvae were fed by artemia only one week and then they were fed gradually by dry mixture for larvae. After a five-day co-feeding they were fed only by dry mixture for larvae. The whole experiment was 4 weeks. In the group which was fed by enriched artemia was statistically higher average weight (247.80 +- 40.36 mg) and average length of body (31.19 +- 1.03 mm) versus the control group. Average weight of control group was 140.76 +- 23.06 mg and average lenght of body was 25,27 +- 0.73 mm. Also average survival of the two groups was statistically different at the end of the experiment. The group which was fed by enriched artemia demonstrated an average survival 15.43 +- 2.90 %, while the control group only 2.20 +- 1.92 %. Only rate of cannibalism was not influenced by enrichment of artemia. But these results, mainly survival was negatively influenced by Ichthyophthirius multifiliis, which was detected on the skin after five days of the experiment. Another parameter was average amount of individual fatty acids in the body of larvae from both groups. In the group which was fed with enriched artemia was found statistically higher level of LA (linoleic acid), LNA (-linolenic acid) and DHA. On the other hand, higher levels of ARA (arachidonic acid), EPA (eicosapentaenoic acid) and DPA (docosapentaenoic acid) was found in control group.
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Final report about research in Sokolov post mining sites in 2017 based on agreement between ENKI ops and Institute of Soil Biology BC CAS
Frouz, Jan ; Mudrák, Ondřej ; Kučera, J. ; Tejedor, Javier ; Kaneda, S. ; Reinshmitová, E. ; Šimáčková, H. ; Albrechtová, J. ; Lhotáková, Z. ; Kukla, J. ; Kopecký, T. ; Vindušková, O. ; Moradi, J. ; Vicentini, Fabio ; Benetková, P. ; Pižl, Václav ; Tajovský, Karel ; Starý, Josef
The report brings main results of the research about soil and ecosystem recovery in post mining landscape near Sokolov based on agreement between ENKI ops and Institute of soil biology, BC CAS.
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Large-scale geosimulations using GEM and trilions
Blaheta, Radim ; Jakl, Ondřej ; Hrtus, Rostislav ; Kolcun, Alexej ; Kohut, Roman ; Starý, Jiří ; Turan, E.
The project deals with efficient solution of singular symmetric positive semidefinite problems. Our motivation arises from the \nneed to solve special problems of geotechnics, e.g. to perform upscaling analysis of geocomposites. In that and other applications we have to solve boundary problems with pure Neumann boundary conditions. We show that the stabilised PCG method with various preconditioners is a good choice for systems resulting from the numerical solution of Neumann problems, or more generally problems with a known small dimensional null space. The work was also taken as an opportunity to compare parallel implementations of the orresponding solvers, namely implementations in the in-house finite element software GEM and implementations employing components of the general Trilinos library. The studies show that the solvers based on GEM are highly competitive with its recognised counterpart.
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Sacrifice and initiation in the myths of Ódinn
Kozák, Jan ; Chlup, Radek (advisor) ; Antalík, Dalibor (referee) ; Starý, Jiří (referee)
This dissertation deals with the interpretation of four myths from early medieval Scandinavia, in which the main role is played by the god Óðinn. All four myths narrate how he achieved a state of permanent increase of his numinous knowledge. Based on the fact that the outcome of all of the narratives is the acquisition of the Mead of Poetry (or its equivalent), they can be percieved as "four reports on the same event". The analysis of myths itself has been executed in two steps: firstly the separate inquiry of the two more central myths and introduction of the other two followed by thorough analysis of the four together. All four myths demonstrate to a certain degree a presence of motifs and structures associated with the religious phenomena of sacrifice and initiation. By the means of said analysis the study reviews the systematic relations of the sacrificial and initiatory structures and postulates a common core which is subsequently named "monomyth".
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Sturla Þórðarson: his work in context of his time and an analysis of the authorial intent
Korecká, Lucie ; Starý, Jiří (advisor) ; Březinová, Helena (referee)
Sturla Þórðarson: his work in context of his time and an analysis of the authorial intent The purpose of this thesis is to analyse the literary-historiographical works of Sturla Þórðarson with regard to the specific historical situation at the time of their origin and the methods and authorial intent of this 13th century Icelandic historian. The introductory chapters give a brief overview of Sturla Þórðarson's life in a broader historical context, based on the extant primary sources, and of his literary and literary- historiographical works. The major topic of the thesis is an analysis and comparison of two of the author's works, Íslendinga saga and Hákonar saga Hákonarsonar, in context of various scholars' views of medieval historiography. The former saga belongs to the genre of samtíðarsögur (contemporary sagas), the latter to the genre of konungasögur (kings' sagas). Both works present the same historical period. The major object of analysis is the differences in the author's approach to the historical material in his literary-historiographical works of different genres; this analysis is followed by an attempt to explain the differences. The first part of the thesis presents a separate analysis of each saga in context of the given genre. Both sagas are among the latest extant works in their respective...
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Riddarasǫgur: the Change of the Old Norse Concept of Saga?
Podolská, Markéta ; Starý, Jiří (advisor) ; Březinová, Helena (referee)
Tato práce se zabývá primárními rytířskými ságami, staroseverskými pře- klady evropské rytířské epiky, a jejich vlivem na další žánry ság, sekundární rytířské ságy a pozdní fantastické ságy. Naším cílem bylo zkoumat změny v prezentaci vybraných postav (hrdina, vládce a hrdinova žena) v závislosti na přechodu společnosti od rodové k systému s feudálními rysy. P·vodní staroseverská tradice je v práci zastoupena ságami rodovými. První kapitola popisuje hlavní problémy rozdělení zkoumaných žánr·. Druhá kapitola před- stavuje detailní analýzu formy a obsahu popis· postav v každém z žánr·. Poslední část přidává aspekt změn struktury společnosti, především ve spo- jitosti se snahou Hákona Hákonarsona zavést užší feudální vazby. Tento pře- chod skutečně ovlivnil očekávání publika. Zjistili jsme, že hlavní změna, kte- rou primární rytířské ságy znamenaly v rámci ságové literatury, bylo, že se cíleně pokoušely změnit společenské konvence a praxi. Pozdější žánry si už nenárokovaly morální závaznost. Přejaly sice kvality zavedené překlady ry- tířské epiky, ovšem dodržovaly také tradiční formu popisu postav. Klíčová slova: rytířské ságy, lživé ságy, rodové ságy, staroseverský, dvorský
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Reflexion of the Norse Discovery of America
Novotná, Markéta ; Starý, Jiří (advisor) ; Polách, Vladimír (referee)
The thesis focuses on the reflection of the discovery of America by the Norsemen, and does so in three steps. Firstly, the approach to and the significance of the Norse voyages to America in the medieval materials, and especially in the Vinland sagas, are presented. This part is accompanied by a general introduction into the sagas. Secondly, the situation in the 19th century is introduced. In this period a lot of scientific works as well as works of art aiming at the Norse voyages to the New continent arose. The factors that led to this increased interest are explored, e.g. national movement in Scandinavia. Thirdly, the contemporary reflexion of the Norse discovery of America is analyzed (particularly its influence on works of art, society, politics and scientific research). The methodology used in this thesis is discourse analysis, which points out to the changing reflexion of the given topic.
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