Search results for "lek"

Normal metal - insulator - superconductor thermometers and coolers with titanium-gold bilayer as the normal metal

2018

We have fabricated superconductor - insulator - normal metal - insulator - superconductor (SINIS) tunnel junctions in which Al acts as the superconductor, AlOx is the insulator, and the normal metal consists of a thin Ti layer (5 nm) covered with a thicker Au layer (40 nm). We have characterized the junctions by measuring their current-voltage curves between 60 mK and 750 mK. For comparison, the same measurements have been performed for a SINIS junction pair whose normal metal is Cu. The Ti-Au bilayer decreases the SINIS tunneling resistance by an order of magnitude compared to junctions where Cu is used as normal metal, made with the same oxidation parameters. The Ti-Au devices are much mo…

Amide functionalized aminobisphenolato MoO2 and WO2 complexes: Synthesis, characterization, and alkene epoxidation catalysis

2023

The use of dioxidomolybdenum(vi) and -tungsten(vi) complexes supported by a variety of structurally different tri- and tetradentate aminobisphenolato ligands as pre-catalysts in the epoxidation of alkenes is well established. However, under the widely used standard 1 mol-% catalyst loadings these types of complexes generally show modest activity only. Recently, amide functionalities in the ligand design of various aminomonophenolato MoO2 complexes have been shown to lead to heightened catalytic activity in alkene epoxidation. In this paper we show that similar ligand amide functionalization can lead to significant enhancement in the alkene epoxidation activity of aminobisphenolato MoO2 comp…

A test of the relationship between argumentativeness, individualism/collectivism, and conflict style preference in the United States and Finland

2016

This study explored relationships between argumentativeness and collectivism/individualism in Finland and the United States. Data were gathered in the United States (n = 412) and Finland (n = 261). The analysis suggested: (a) collectivism was negatively correlated with argumentativeness, (b) individualism was positively correlated with argumentativeness, and (c) Finnish participants reported lower levels of argumentativeness than Americans. Cultural differences between the United States and Finland are discussed as reasons for the differences between the nations on argumentativeness. peerReviewed

Die Homerische Frage

1885

Militārās jomas reālijas apzīmējošā leksika Homēra poēmā Īliada

2017

Bakalaura darba tēma Militārās jomas reālijas apzīmējošā leksika Homēra poēmā “Īliada” izvirza mērķi – pamatojoties uz militārās jomas leksikas analīzi Homēra poēmā Īliada, noskaidrot tekstā pieminēto un raksturoto reāliju atbilstību pirmspolisas periodam. Lai sasniegtu šo mērķi autore iepazinās ar mūsdienu teorētisko un zinātnisko literatūru, kas klāsta par Homēra poēmām un pirmspolisas periodu, un ar vēsturisko literatūru, kas sniedz arheoloģijas liecības par XI-IX gs. p. m. ē.; izpētīja Homēra Īliadas oriģināltekstu un veica nepieciešamo leksēmu atlasi un tulkojumu. Pētījumā tika izmantota sastatījuma metode. Pētījuma beigās tika secināts, ka atsevišķas aprakstītās Homēra Īliadā militārā…

Gaismas leksika Homēra eposā “Īliada”

2016

Bakalaura darbā “Gaismas leksika Homēra Īliādā’’ tika izpētīta gaismu apzīmējošā leksika ar mērķi noteikt tās lietojuma funkcijas. Gaismas leksika ir vārdu kopums, kuru izmantojot kā māksliniecisko izteiksmes līdzekļu veidošanas rīku, Homērs panāk “Īliādā” aprakstīto ainu un priekšmetu atainojumu ilustrācijas. Gaisma ir vērtīgs parādību avots, no kura smeļoties leksiku ir iespējams aprakstīt lietas tiešajā un pārnestajā nozīmē, piemēram, izteikt rakstura izcilību, ārējā izskata skaistumu, priekšmetu skaistumu, emociju izpausmes. Pētījuma gaitā tika izpētīts gaismas leksiski semantiskais lauks grieķu valodā, ir nosauktas tās lietojuma pamatfunkcijas, kā arī ir izpētīti mūsdienu leksikoloģija…

Radical Besinnung as a Method for Phenomenological Critique

2022

The chapter discusses Husserl’s method of historical reflection, radical Besinnung, as defined and used in Formale und transzendentale Logik (1929). Whereas Formal and Transcendental Logic introduces and displays Husserl’s usage of Besinnung in the context of the exact sciences, the chapter seeks to develop it as a more general critical method with which to approach any rational goal-directed activity. Husserl defines Besinnung as a method that enables understanding agents and their actions by explicating agents’ typically implicit goals. It leads to the inclusion of historical-teleological activities as part of Husserl’s natural understanding of the world. The transcendental reflection rad…

Ab initio molecular dynamics study of overtone excitations in formic acid and its water complex

2018

In this article, we present results from ab initio molecular dynamics simulation of overtone excitation in formic acid monomer and its water complex in the gas phase. For the monomer, a conformation change is observed employing both OH and CH vibrational excitations, which supports experimental findings. In the formic acid–water complex, interconversion also takes place, but it proceeds via hydrogen exchange rather than via intramolecular reaction. Simulations raise a question on effect of quantum and matrix effects to the results. Also, a brief test of different computation methods was done on the system. peerReviewed

Conformational equilibrium in supramolecular chemistry: Dibutyltriuret case

2015

The association of substituted benzoates and naphthyridine dianions was used to study the complexation of dibutyltriuret. The title molecule is the simplest molecule able to form two intramolecular hydrogen bonds. The naphthyridine salt was used to break two intramolecular hydrogen bonds at a time while with the use of substituted benzoates the systematic approach to study association was achieved. Both, titrations and variable temperature measurements shed the light on the importance of conformational equilibrium and its influence on association in solution. Moreover, the associates were observed by mass spectrometry. The DFT-based computations for complexes and single bond rotational barr…

Host-Guest Complexes of C-Ethyl-2-methylresorcinarene and Aromatic N,N′-Dioxides

2017

The C‐ethyl‐2‐methylresorcinarene (1) forms 1:1 in‐cavity complexes with aromatic N,N′‐dioxides, only if each of the aromatic rings has an N−O group. The structurally different C‐shaped 2,2′‐bipyridine N,N′‐dioxide (2,2′‐BiPyNO) and the linear rod‐shaped 4,4′‐bipyridine N,N′‐dioxide (4,4′‐BiPyNO) both form 1:1 in‐cavity complexes with the host resorcinarene in C4v crown and C2v conformations, respectively. In the solid state, the host–guest interactions between the 1,3‐bis(4‐pyridyl)propane N,N′‐dioxide (BiPyPNO) and the host 1 stabilize the unfavorable anti‐gauche conformation. Contrary to the N,N′‐dioxide guests, the mono‐N‐oxide guest, 4‐phenylpyridine N‐oxide (4PhPyNO), does not form an…