907 research outputs found
Le "Determinisme linguistique" de Benveniste et le cas du Vaisesika
No full textLyssenko Viktoria. Le "Determinisme linguistique" de Benveniste et le cas du Vaisesika [Электронный ресурс] / V. Lyssenko// Indologica : сб. ст. памяти Т. Я. Елизаренковой / Рос. гос. гуманитарный ун-т. - М. : РГГУ, 2012. - Кн. 2. - С. 381-396
Dopad Obchodní Války mezi USA a Čínou na Globální Dodavatelské Řetězce. Případová Studie Technologického Odvětví.
No full textThis thesis aims to identify the impact of the U.S.-China trade war on U.S. semiconductors and Information and Communication Technology (ICT) industries, by showing how the conflict has reshaped supply chains, impacted the nature of trade relations, and examined sectoral performance. In this thesis the issues of national security, intellectual property, and technological interdependence are discussed in more detail. Disagreements in these aspects have led to the imposition of protective actions, both in the form of tariffs and non-tariff measures, which in turn have had a mixed impact on the manufacturing sectors of the semiconductor and ICT industries. In order to assess the impact of the trade war on selected U.S. manufacturing sectors, a quantitative analysis using advanced statistical research methods was conducted. The result of the analysis of shifts in supply chains in one of the most globalised industries indicates that the United States and allies dominating semiconductor-equipment supply and China commanding assembly, testing, and packaging, full decoupling proves impractical. Also, the impact of the measures taken on the sectoral performance of U.S. manufacturing is not unambiguous, as for high-tech industries innovation and labour quality are more important determinants of productive capacity. The conflict is driving selective reshoring and higher costs rather than a clean break, leaving both economies strategically rivalrous yet economically intertwined.Cílem této práce je zjistit dopad americko-čínské obchodní války na americký průmysl polovodičů a informační a komunikační technologie (ICT) tím, že ukáže, jak konflikt změnil dodavatelské řetězce, ovlivnil povahu obchodních vztahů a prozkoumal výkonnost odvětví. V této práci jsou podrobněji rozebrány otázky národní bezpečnosti, duševního vlastnictví a technologické vzájemné závislosti. Neshody v těchto aspektech vedly k zavedení ochranných opatření, a to jak v podobě cel, tak i netarifních opatření, která následně měla smíšený dopad na výrobní odvětví polovodičového průmyslu a průmyslu informačních a komunikačních technologií. Za účelem posouzení dopadu obchodní války na vybraná výrobní odvětví USA byla provedena kvantitativní analýza s využitím pokročilých statistických výzkumných metod. Výsledek analýzy posunů v dodavatelských řetězcích v jednom z nejvíce globalizovaných průmyslových odvětví ukazuje, že vzhledem k tomu, že Spojené státy a jejich spojenci dominují dodávkám polovodičového výrobního vybavení a Čína ovládá montáž, testování a balení, úplné oddělení se ukazuje jako nepraktické. Rovněž dopad přijatých opatření na odvětvovou výkonnost amerického zpracovatelského průmyslu není jednoznačný, neboť pro technologicky vyspělá odvětví jsou inovace a kvalita pracovní síly důležitějšími faktory určujícími výrobní kapacitu. Konflikt vede spíše k selektivnímu přesunu výroby a vyšším nákladům než k úplnému přerušení, takže obě ekonomiky jsou strategicky soupeřící, ale hospodářsky provázané
(Mesitylene)ruthenium π-complexes with benzo-15-crown-5 and dibenzo-18-crown-6
No full textThe reactions of benzo-15-crown-5 and dibenzo-18-crown-6 with 1 equiv. of [(mes)Ru(MeNO2)3]2+ (mes = 1,3,5-C6H3Me3) give the mononuclear complexes [(mes)Ru(η6-benzo-15-crown-5)]2+ (1) and [(mes)Ru(η6-dibenzo-18-crown-6)]2+ (2) in 50% yield. Similar reaction with 2 equiv. of [(mes)Ru(MeNO2)3]2+ produces the dinuclear complex [(μ-η6:η6-dibenzo-18-crown-6)Ru2(mes)2]4+ (3) in 96% yield as a 2:3 mixture of cis- and trans-isomers. Structures of 2(OTf)2 and trans-3(OTf)4 were confirmed by X-ray diffraction. The NMR titration showed that mononuclear dications 1 and 2 bind Na+ ion less effective (Ka = 600 and 250 M-1) than free benzo-15-crown-5 and dibenzo-18-crown-6 (Ka = 2 × 105 and 5 × 106 M-1). The dinuclear tetracation 3 does not bind Na+ within measurable limits of NMR titration method. The electrochemical behaviour of complexes 1-3 was studied in propylene carbonate solution. They exhibit a partially chemically reversible Ru(II)/Ru(I) reduction, which in the case of the dinuclear complex 3 proceeds through two slightly separated steps. The redox activity of the complexes is substantially unaffected by the presence of sodium ion. © 2010 Elsevier B.V. All rights reserved
Slipped μ-indenyl triple-decker complexes containing (C 4Me4)Co and (C5R5)Ru fragments
No full textSlipped triple-decker complexes with a bridging indenyl ligand, namely [Cb*Co(μ:η5:η6-C9H 7)CoCb*]+ (2, Cb* = C4Me 4) and [Cb*Co(μ:η6-C9H 7)Ru(C5R5)]+ (R = H, 5a; Me, 5b), have been synthesised by electrophilic stacking of [Cb* Co(η5-C9H7)] (1) with [Cb*Co(MeCN)3]+ or [(C5R 5)Ru-(MeCN)3]+ (R = H, Me), respectively. A similar reaction of [(C5R5)Ru(η5-C 9H7)] (R = H, 3a; Me, 3b) with [Cb*Co-(MeCN) 3]+ affords the cations [(C5R 5)Ru(μ:η5:η6-C9H 7)-CoCb*]+ (R = H, 4a; Me, 4b), which are isomeric with 5a,b. Stacking of [Ru(η5-C9H7)2] (7) with [Cb*Co(MeCN)3]+ or [Cb*CoI] x/TlBF4 gives the triple-decker complex [(η5-C9H7)-Ru(μ:η5: η6-C9H7)CoCb*]+ (8). Further reaction of 8 with [Cp*RuCl]4/TlBF4 unexpectedly affords the slipped tetradecker ruthenium complex (Cp*Ru(μ:η5:η6-C9H 7)Ru(μ:η5:η6-C9H 7)RuCp*]2+ (11). The structures of [4b][Co(η-7,8-C2B9H11)2] and [Cp*Ru(η6-C9H7)] (6) have been determined by X-ray diffraction, and the electrochemical behaviour of the complexes prepared has been studied. © Wiley-VCH Verlag GmbH & Co. KGaA, 2006
Electrochemical behaviour of cobalta-dicarbollide sandwich complexes with different capping units
No full textThe redox aptitude of a series of cobalt(III) or cobalt(I) sandwich complexes bearing a charge compensated dicarbollide ligand ([9-L-7,8-C 2B9H10]-) as a constant unit and different counterparts (varying from classical [7,8-C2B 9H11]2- to charge-compensated [9-L-7,8-C 2B9H10]- dicarbollides, from cyclopentadienyl [C5R5]- (R = Me, H) to cyclobutadiene [C4Me4]0 ligands) has been studied. All the Co(III) complexes display the reversible sequence Co(III)/Co(II)/Co(I). In contrast, the Co(I) complexes (namely, those capped by tetramethylcyclobutadiene) accede reversibly only to the Co(II) oxidation state, the passage to Co(III) being irreversible. When possible, the Co(II) intermediates have been characterized by EPR spectroscopy. The molecular structures of the monocation [Co(η-9-SMe2-7,8-C2B 9H10)2]+ in its DD/LL and meso diastereomeric forms as well as that of heteroleptic (η-7,8-C 2B9H11)Co(η-9-SMe2-7,8-C 2B9H10) have been obtained by single-crystal diffraction. © Springer-Verlag 2005
Polarization revival of a Bloch oscillating wave packet in conjunction with resonant Zener tunneling
Get PDFWe investigate the dynamics of a Bloch-oscillating wave packet in the presence of strong coupling to delocalized above barrier states (Zener tunneling), using time-resolved intraband polarization-sensitive measurements. At a threshold electric field, the resonance of localized and delocalized states causes a quantum beating which is observed as a revival in the intraband polarization. Our numerical simulation visualizes the spatial wave packet decomposition and reformation. The wave packet moves on a ps time scale over a distance of more than 100 nm and sequentially undergoes Bloch oscillations in the below- and above-barrier bands
A new approach to the photochemically controlled crown ethers: (Tetramethylcyclobutadiene)cobalt complexes with benzo-15-crown-5 and dibenzo-18-crown-6
No full textThe photochemical substitution of benzene in [Cb*Co(C 6H6)]+ (Cb* = C4Me 4) with benzo-15-crown-5 (1) gives the corresponding π-complex [Cb*Co(η6-C6H4(OCH2CH 2C)CH2CH2)2O)]+ (2). A similar reaction with dibenzo-18-crown-6 (3) produces cation [Cb*Co(η6-C6H4(OCH2CH 2OCH2CH2O)2C6H 4)]+ (4). Arene exchange is reversible, and both 1 and 3 can be regenerated by irradiation of 2 and 4 with excess benzene. The reaction of [Cb*Co(C6H6)]+ with 0.5 equiv of 3 gives dinuclear complex [trans-Cb*Co(μ-η6, η6-C6H4(OCH2CH 2OCH2CH2O)2C6H 4)CoCb*]2+ (5). The structures of cations 4 and 5 were confirmed by X-ray diffraction. The electrochemical behavior of complexes prepared was studied. The sodium-binding ability of cobalt complexes 2,4, and 5 (determined by NMR titration; Ka = 2500, 800, and 50, respectively) was found to be much smaller than that of the free crown ethers 1 and 3 (K a, -200 000 and 5 000 000). DFT calculations suggest that this decrease is mainly due to electrostatic repulsion of Co+ and Na + centers. © 2008 American Chemical Society
Interaction between prenatal growth and high-risk genotypes in the development of type 2 diabetes
Get PDFAims/hypothesis: early environmental factors and genetic variants have been reported to be involved in the pathogenesis of type 2 diabetes. The aim of this study was to investigate whether there is an interaction between birthweight and common variants in the TCF7L2, HHEX, PPARG, KCNJ11, SLC30A8, IGF2BP2, CDKAL1, CDKN2A/2B and JAZF1 genes in the risk of developing type 2 diabetes.
Methods: a total of 2,003 participants from the Helsinki Birth Cohort Study, 311 of whom were diagnosed with type 2 diabetes by an OGTT, were genotyped for the specified variants. Indices for insulin sensitivity and secretion were calculated.
Results: low birthweight was associated with type 2 diabetes (p?=?0.008) and impaired insulin secretion (p?=?0.04). Of the tested variants, the risk variant in HHEX showed a trend towards a low birthweight (p?=?0.09) and the risk variant in the CDKN2A/2B locus was associated with high birthweight (p?=?0.01). The TCF7L2 risk allele was associated with increased risk of type 2 diabetes. Pooling across all nine genes, each risk allele increased the risk of type 2 diabetes by 11%. Risk variants in the HHEX, CDKN2A/2B and JAZF1 genes interacted with birthweight, so that the risk of type 2 diabetes was highest in those with lower birthweight (p???0.05). The interaction was also present in the pooled data.
Conclusions/interpretation: low birthweight might affect the strength of the association of some common variants (HHEX, CDKN2A/2B and JAZF1) with type 2 diabetes. These findings need to be replicated in independent cohort
Luminescent complexes of Eu3+,Tb3+ and Gd3+ nitrates with polytopic ligand 2,4,6-tris(1H-pyrazol-1-yl)-1,3,5-triazine
No full textThree novel coordination compounds based on 2,4,6-tris(1H-pyrazolyl)-l,3,5-triazine ligand (PzTz), namely [Ln(PzTz)(NO3)3(H2O)] (Ln = Eu, Gd, Tb) were synthesized and spectroscopically and structurally characterized. X-ray diffraction experiments revealed the monomeric nature of the complexes exhibiting either “sphenocorona” or bicapped square antiprism distorted coordination geometry, the lanthanide ions being ten-coordinated. The relatively high energy of triplet state of the ligand (T1 = 23,000 cm−1) has been demonstrated to be favorable for sensitization of Tb3+ ion and this has been proved by luminescence decay measurements as well as by experimental determination of photoluminescence quantum yield (Φ = 34%)
Dopad Obchodní Války mezi USA a Čínou na Globální Dodavatelské Řetězce. Případová Studie Technologického Odvětví.
No full textThis thesis aims to identify the impact of the U.S.-China trade war on U.S. semiconductors and Information and Communication Technology (ICT) industries, by showing how the conflict has reshaped supply chains, impacted the nature of trade relations, and examined sectoral performance. In this thesis the issues of national security, intellectual property, and technological interdependence are discussed in more detail. Disagreements in these aspects have led to the imposition of protective actions, both in the form of tariffs and non-tariff measures, which in turn have had a mixed impact on the manufacturing sectors of the semiconductor and ICT industries. In order to assess the impact of the trade war on selected U.S. manufacturing sectors, a quantitative analysis using advanced statistical research methods was conducted. The result of the analysis of shifts in supply chains in one of the most globalised industries indicates that the United States and allies dominating semiconductor-equipment supply and China commanding assembly, testing, and packaging, full decoupling proves impractical. Also, the impact of the measures taken on the sectoral performance of U.S. manufacturing is not unambiguous, as for high-tech industries innovation and labour quality are more important determinants of productive capacity. The conflict is driving selective reshoring and higher costs rather than a clean break, leaving both economies strategically rivalrous yet economically intertwined.Cílem této práce je zjistit dopad americko-čínské obchodní války na americký průmysl polovodičů a informační a komunikační technologie (ICT) tím, že ukáže, jak konflikt změnil dodavatelské řetězce, ovlivnil povahu obchodních vztahů a prozkoumal výkonnost odvětví. V této práci jsou podrobněji rozebrány otázky národní bezpečnosti, duševního vlastnictví a technologické vzájemné závislosti. Neshody v těchto aspektech vedly k zavedení ochranných opatření, a to jak v podobě cel, tak i netarifních opatření, která následně měla smíšený dopad na výrobní odvětví polovodičového průmyslu a průmyslu informačních a komunikačních technologií. Za účelem posouzení dopadu obchodní války na vybraná výrobní odvětví USA byla provedena kvantitativní analýza s využitím pokročilých statistických výzkumných metod. Výsledek analýzy posunů v dodavatelských řetězcích v jednom z nejvíce globalizovaných průmyslových odvětví ukazuje, že vzhledem k tomu, že Spojené státy a jejich spojenci dominují dodávkám polovodičového výrobního vybavení a Čína ovládá montáž, testování a balení, úplné oddělení se ukazuje jako nepraktické. Rovněž dopad přijatých opatření na odvětvovou výkonnost amerického zpracovatelského průmyslu není jednoznačný, neboť pro technologicky vyspělá odvětví jsou inovace a kvalita pracovní síly důležitějšími faktory určujícími výrobní kapacitu. Konflikt vede spíše k selektivnímu přesunu výroby a vyšším nákladům než k úplnému přerušení, takže obě ekonomiky jsou strategicky soupeřící, ale hospodářsky provázané
- …
