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Emanuel Šlechta as Minister of Technology from February 1948 in the governments of K. Gottwald, A. Zápotocký, and V. Široký, and as Minister of Construction (State Committee for Construction) until 1956 (1960)
(Czech Technical University in Prague) Sedláček, Jiří; Hlavačka, Milan; Friedl, Jiří; Jirásek, Zdeněk
The life and work of Emanuel Šlechta (18951960) are a example of a complex fate that is dramatically intertwined with the history of Czechoslovakia in the first half of the 20th century. Šlechta represents a type of technocratic intellectual who tried to transfer modern foreign scientific knowledge into practice, not only in the field of industrial practice and business management, but also in state administration and education.. In his time, he was one of the main popularizers of scientific organization and management of work and rationalization of industry and had a fundamental influence on the formation of the technical-managerial culture of the young republic. However, his fate is also a warning testimony about the clash of rationality and ideology in the 20th century. After World War II, he was professionally on the same level as the prominent national economist Jiří Hejda, with whom he was friends. He was appointed chairman of the national administration of Živnobanka, where, as part of the country's economic recovery, he devoted himself to the creation of large industrial complexes and sectors (e.g. sugar industry), including transport. In the second government of Klement Gottwald, he was Minister of Technology from February 1948. He retained his position until 1950, also in the government of Antonín Zápotocký and Viliam Široký, in which he then became Minister of Construction (Construction) from 1950. He held this position in the following second government of Viliam Široký until 1956. In the years 19561960 (until his death) he then served in this government as minister and chairman of the State Committee for Construction. After the deaths of Gottwald and Stalin and the general condemnation of the cult of personality, the new set of communist politicians Zápotocký and Novotný began to ignore him and question his expertise. These attacks intensified over time and ultimately led to Šlecht's decline and suicide.
Greatest Common Right Divisors for Quaternion Polynomial Matrices: Computation, Extraction, and Certification
(2026) Šebek M.
Quaternion-valued models arise in several control-relevant applications, including attitude dynamics, quantum control, and multi-channel signal processing. We study greatest common right divisors (GCRDs) of quaternion polynomial matrices in a central indeterminate. Two complementary computation fronts are considered: a staircase-based method working directly in the quaternion setting, and a Sylvester-based method realized through the real-adjoint embedding. Quotient matrices are then reconstructed by embedded least squares and validated by solver-independent residual certificates. We also point out quaternion-specific phenomena showing that, for quaternion polynomial matrices, a GCRD is primarily a divisibility object rather than an object determined by common right-evaluation zeros. A planted example and small-scale experiments illustrate the workflow and indicate that both approaches can be made reliable, while the present staircase-based implementation is faster and numerically sharper on the reported tests.
Multimédia I
(2016) Berka, R.; Rund, F.; Husník, L.; Sporka, A.
Generation of electromagnetic and particle radiation pulses in high energy density plasma
(ČVUT v Praze. Fakulta elektrotechnická., 2026) Cikhardt, Jakub
Polarization controlled assembly of molecular nanostructures on ZnO surfaces
(ČVUT v Praze. Fakulta elektrotechnická., 2026) Ukraincev, Jegor
Zinc oxide (ZnO) is a technologically versatile wide-bandgap semiconductor whose structural, electronic, and chemical properties enable its use across a broad spectrum of scientific and technological fields. It is employed in applications related to water purification, gas sensing, biosensing, antimicrobial coatings, and UV protection, and it plays an important role in modern optoelectronic and energy‑related devices. In practical applications, ZnO is most frequently used in the form of powders, thin films, or one‑, two‑, and three‑dimensional nanostructures. Monocrystalline ZnO samples remain comparatively underutilized despite their well‑defined surface terminations. A particularly underexplored aspect concerns the adsorption behavior of molecules on the four low‑index single‑crystal ZnO surfaces, each characterized by a distinct orientation of surface dipoles and topmost surface atoms. Although these facets share identical chemical composition, their polarity and atomic termination give rise to markedly different interfacial interactions. The molecular‑level mechanisms governing adsorption on these surfaces remain insufficiently understood, even though this knowledge is essential for interpreting experiments on ZnO powders, polycrystalline films, and complex nanostructures. To address this gap, the thesis investigates the adsorption of several representative molecular systems – including amino acids and bovine serum albumin (BSA), thiorphan, chiral [7]-helicene molecules, CoO and CsPbBr3 perovskites – on well‑defined ZnO facets. The analysis combines high‑resolution experimental techniques such as atomic force microscopy, scanning electron microscopy with theoretical approaches based on force‑field molecular dynamics and density‑functional tight‑binding simulations [1–4]. This integrated methodology enables a systematic examination of how surface polarity and surface chemistry dictate molecular conformation, assembly, and stability. A consistent and striking observation across these studies is that identical molecules can form entirely different nanostructures on different ZnO facets, despite the identical stoichiometry of the underlying crystal [1–4]. This facet‑dependent behavior must therefore be considered whenever ZnO is used in polycrystalline or nanostructured form. The broader relevance of polarity‑controlled or topmost-atom-controlled assembly is further supported by several ongoing studies that extend this conceptual framework to chiral organic molecules, magnetic nanostructures, and perovskite quantum dots. Preliminary results on helicene [5], cobalt nanostructures [6], and CsPbBr3 perovskites [7–10] – planned for publication in 2026–2027 – demonstrate that the same principles governing biomolecular adsorption also apply to structurally and electronically diverse nanoscale systems. Additional research activities related to ZnO surface modification – such as plasma‑based treatments [11,12], oxidative and reductive annealing [13], and Al-, Ga- and Co-doping strategies [14,15] – are acknowledged but lie outside the primary scope of this thesis. Likewise, the author’s independent development of a non‑contact, non‑resonant AFM technique for probing weakly adhered objects, although patented [16,17] and published [18], is treated as a separate line of inquiry due to its methodological rather than interfacial focus.