Search results for "Irak"

Nelīdzsvara elektronu enerģijas sadalījuma funkcijas modelēšana periodiski modulētajam kvantu punktam

2017

Nanoelektroniskās ierīcēs ir plaši izmantojams kvantu punkts, kura īpašības ir atkarīgas no elektronu sadalījuma pa kvantu punkta enerģētiskajiem līmeņiem. Tunelēšanas procesi kvantu punktā bieži vien notiek režīmā, kurā elektroni nespēj relaksēt līdzsvara stāvoklī, kas var ietekmēt darbības efektivitāti. Otrais nozīmīgs faktors, ko mēs gribam ņemt vērā, ir elektronisko līmeņu spektra diskrēta daba, kas ietekmē sadalījuma formu. Šo divu efektu ietekme tiek izpētīta mūsu darbā, modelējot kvantu punkta-tuneļbarjeras-kontakta sistēmu ar Kinētisko Montekarlo metodi. Tiek simulēti elektronu nelīdzsvarotie sadalījumi kvantu punktā ar diskrēto līmeņu spektru, kas ļauj pētīt šo faktoru ietekmi uz n…

Nominaalirakenteet Jyväskylän puhekielessä

2001

Del terrorismo a la guerra

2004

Los medios y la guerra

2003

Pyrazolium- and 1,2-Cyclopentadiene-Based Ligands as σ-Donors: a Theoretical Study of Electronic Structure and Bonding

2012

A high-level theoretical investigation of 1,2-cyclopentadiene (4) was performed using density functional theory and wave function methods. The results reveal that, in contrast to earlier assumptions, the ground state of this ephemeral “allene” is carbene-like with a small diradical component. Furthermore, the electronic structure and chemistry of 4 are found to parallel that of 1,2,4,6-cycloheptatetraene: both molecules possess a low-lying excited singlet state with a closed-shell carbenic structure, enabling rich coordination chemistry. Energy decomposition analyses conducted for currently unknown metal complexes of 4 as well as those involving stable carbenes based on the pyrazolium frame…

Synthesis of a labile sulfur-centred ligand, [S(H)C(PPh2S)2]-: structural diversity in lithium(i), zinc(ii) and nickel(ii) complexes

2016

A high-yield synthesis of [Li{S(H)C(PPh2S)2}]2 [Li2·(3)2] was developed and this reagent was used in metathesis with ZnCl2 and NiCl2 to produce homoleptic complexes 4 and 5b in 85 and 93% yields, respectively. The solid-state structure of the octahedral complex [Zn{S(H)C(PPh2S)2}2] (4) reveals notable inequivalence between the Zn–S(C) and Zn–S(P) contacts (2.274(1) Å vs. 2.842(1) and 2.884(1) Å, respectively). Two structural isomers of the homoleptic complex [Ni{S(H)C(PPh2S)2}2] were isolated after prolonged crystallization processes. The octahedral green Ni(II) isomer 5a exhibits the two monoprotonated ligands bonded in a tridentate (S,S′,S′′) mode to the Ni(II) centre with three distinctl…

Bliski Wschód w ogniu. Salaficki dżihadyzm w ujeciu Patricka Cockburna

2015

Celem rozdziału jest omówienie obrazu salafickiego dżihadyzmu w Libii, Iraku i Syrii, który od lat analizuje Patrick Cockburn - komentator i reporter londyńskiego dziennika ,, The Independent". Cockburn, jak ujęła to Claire Fox (The Institute of Ideas), pisze w sposób błyskotliwy, pogłębiony i krytyczny. Autor, najpierw skupił się na przebiegu i skutkach upadku, rządzonej przez pułkownika Muammara Kadafiego, Arabskiej Libijskiej Dżamahiriji, o którym zdecydowały naloty Paktu Północnoatlantyckiego (NATO). W drugiej części tekstu zostały opisane sukcesy Islamskiego Państwa Iraku i Lewantu (Islamie State of Iraq and al-Sham, ISIS), fundamentalistycznych (salafickich) dżihadystów, którzy kontro…

Kaaoksen kesyttäjät : uutismediat nettimurroksessa 2006-2012

2014

Electronic Structures of Main-Group Carbene Analogues

2007

The electronic structures of 15 group 13−16 carbene analogues are analyzed using various quantum chemical methods and compared to the data obtained for the parent N-heterocyclic carbene (NHC), imidazol-2-ylidene. The results of this study present a uniform analysis of the similarities and differences in the electronic structures of p-block main-group carbene analogues. Though all systems are formally isovalent, the theoretical analyses unambiguously indicate that their electronic structures run the gamut from CC localized (group 13) to CN localized (group 16) via intermediate, more delocalized, systems. In particular, neither the stibenium ion nor any of the chalcogenium dications is a dire…

Electronic Structures and Spectroscopic Properties of 6π-Electron Ring Molecules and Ions E2N2 and E42+ (E = S, Se, Te)

2004

The electronic structures and molecular properties of square-planar 6π-electron ring molecules and ions E2N2 and E42+ (E = S, Se, Te) were studied using various ab initio methods and density functionals. All species were found to contain singlet diradical character in their electronic structures. Detailed analysis of the CAS wave function of S2N2 in terms of different valence bond structures gives the largest weight for a Lewis-type singlet diradical VB structure in which the two unpaired electrons reside on nitrogen atoms, though the relative importance of the different VB structures is highly dependent on the level of theory. The diradical character in both E2N2 and E42+ was found to incr…