Practical importance of the shape of a tall building in the city space

The development of construction technology creates ever greater opportunities for designing tall buildings with unusual shapes. So the question remains: what role might the shape of a tall building play in developing a legible and imageable environment? The paper aims to show the importance of the shape of a tall building for imageability and legibility of the urban environment, on the basis of previously published analyses by various authors, which are part of wider studies on: placemaking with tall buildings, imageability of tall buildings and orientation in the urban space. The importance of the shape of a tall building is presented in three aspects: its functioning as a landmark, imageability of such buildings and recognisability of a district of the city as well as the city itself. The unique shape of a tall building has enormous potential for use in creating legible and imageable urban environment. The shape can be used to create distinctive landmarks of different scale and importance to the city. The location of a tall building with a distinctive shape is important. Constructing such a building in a clearly visible place makes it easy to remember. When such a building is located e.g. at the terminus of a street's view corridor, it significantly contributes to the strengthening of its imageability. Examples presented in this paper show that single tall buildings with unique shapes are important for the recognisability of a district of the city, and even the city as a whole

New York’s super-slender towers and European slender high-rise buildings: differences in the urban context

The latest construction technologies have enabled the erection of very slender skyscrapers. This phenomenon is developing significantly in New York, but very slender high-rise buildings are also being designed on other continents. The aim of this paper is to characterize existing and planned slender European skyscrapers. The study examined the location of slender high-rise buildings and their relationship with their surroundings. It sought differences and similarities in the location of slender European skyscrapers within the urban fabric compared to American skyscrapers. The presented examples of slender skyscrapers in Europe illustrate the diversity of their locations, the character of the areas in which they are designed, and the buildings themselves. The analysis of their relationship with the surroundings revealed many differences compared to New York's super-slender towers, such as the presence of open space, location at significant distances from other buildings, and even location in landscapes dominated by nature. Only some slender European high-rise buildings are designed in high-density development, which may resemble New York's super-slender towers.The latest construction technologies have enabled the erection of very slender skyscrapers. This phenomenon is developing significantly in New York, but very slender high-rise buildings are also being designed on other continents. The aim of this paper is to characterize existing and planned slender European skyscrapers. The study examined the location of slender high-rise buildings and their relationship with their surroundings. It sought differences and similarities in the location of slender European skyscrapers within the urban fabric compared to American skyscrapers. The presented examples of slender skyscrapers in Europe illustrate the diversity of their locations, the character of the areas in which they are designed, and the buildings themselves. The analysis of their relationship with the surroundings revealed many differences compared to New York's super-slender towers, such as the presence of open space, location at significant distances from other buildings, and even location in landscapes dominated by nature. Only some slender European high-rise buildings are designed in high-density development, which may resemble New York's super-slender towers

FISH-aimed karyotype analysis in Aconitum subgen : aconitum reveals excessive rDNA sites in tetraploid taxa

The location of 5S and 35S rDNA sequences in chromosomes of four Aconitum subsp. Aconitum species was analyzed after fluorescence in situ hybridization (FISH). Both in diploids (2n = 2x = 16; Aconitum variegatum, A. degenii) and tetraploids (2n = 4× = 32; A. firmum, A. plicatum), rDNA repeats were localized exclusively on the shorter arms of chromosomes, in subterminal or pericentromeric sites. All analyzed species showed similar basal genome size (Cx = 5.31-5.71 pg). The most striking features of tetraploid karyotypes were the conservation of diploid rDNA loci and emergence of many additional 5S rDNA clusters. Chromosomal distribution of excessive ribosomal sites suggests their role in the secondary diploidization of tetraploid karyotypes

New York’s super-slender towers and European slender high-rise buildings: differences in the urban context

The latest construction technologies have enabled the erection of very slender skyscrapers. This phenomenon is developing significantly in New York, but very slender high-rise buildings are also being designed on other continents. The aim of this paper is to characterize existing and planned slender European skyscrapers. The study examined the location of slender high-rise buildings and their relationship with their surroundings. It sought differences and similarities in the location of slender European skyscrapers within the urban fabric compared to American skyscrapers. The presented examples of slender skyscrapers in Europe illustrate the diversity of their locations, the character of the areas in which they are designed, and the buildings themselves. The analysis of their relationship with the surroundings revealed many differences compared to New York's super-slender towers, such as the presence of open space, location at significant distances from other buildings, and even location in landscapes dominated by nature. Only some slender European high-rise buildings are designed in high-density development, which may resemble New York's super-slender towers

Game of associations: the shape of a tall building

Tall buildings, which refer to spiral, pyramid or obelisk shapes, or the shape of a gate or triumphal arch, may resemble old buildings of symbolic importance. Tall buildings that relate to these shapes and forms and are associated with them are still being designed. The relatively easy recognition of these building shapes is used to create distinctive large-scale landmarks

Many interacting fermions in a one-dimensional harmonic trap: a quantum-chemical treatment

We employ \textit{ab initio} methods of quantum chemistry to investigate spin-1/2 fermions interacting via a two-body contact potential in a one-dimensional harmonic trap. The convergence of the total energy with the size of the one-particle basis set is analytically investigated for the two-body problem and the same form of the convergence formula is numerically confirmed to be valid for the many-body case. Benchmark calculations for two to six fermions with the full configuration interaction method equivalent to the exact diagonalization approach, and the coupled cluster method including single, double, triple, and quadruple excitations are presented. The convergence of the correlation energy with the level of excitations included in the coupled cluster model is analyzed. The range of the interaction strength for which single-reference coupled cluster methods work is examined. Next, the coupled cluster method restricted to single, double, and noniterative triple excitations, CCSD(T), is employed to study a two-component Fermi gas composed of 6 to 80 atoms in a one-dimensional harmonic trap. The density profiles of trapped atomic clouds are also reported. Finally, a comparison with experimental results for few-fermion systems is presented. Upcoming possible applications and extensions of the presented approach are discussed.Comment: 25 pages, 12 figures, 1 tabl