Search results for "SPATIAL STRUCTURE"

Fractal dimension versus density of built-up surfaces in the periphery of Brussels

2007

International audience; This paper aims at showing the usefulness of the fractal dimension for characterizing the spatial structure of the built-up surfaces within the periurban fringe. We first discuss our methodology and expectations in terms of operationality of the fractal dimension theoretically and geometrically. An empirical analysis is then performed on the southern periphery of Brussels (Brabant Wallon). The empirical analysis is divided into two parts: first, the effect of the size and shape of the windows on the fractal measures is empirically evaluated; this leads to a methodological discussion about the importance of the scale of analysis as well as the real sense of fractality…

Acetylcholine esterase: the structure.

1991

Przeobrażenia przestrzennej struktury miast w Ameryce Łacińskiej

2008

In recent years, processes have taken place within the space of cities of Latin America, resulting in the fact that their spatial structure is changing in an essential way. The author tries to describe the essence and directions of the transformations under way and to specify the most characteristic elements which have appeared within the space of a few chosen cities. Research conducted in various countries of the region shows a continuing presence of some traditional features of the spatial structure of cities. However, simultaneously, some new features which are becoming the predominant element in the reality of the cities are gradually growing stronger and stronger. Observations of proce…

Handling of Small Scale Structures of the Irradiance Field for Solar Energy System Analysis – A Review

2016

Abstract Satellite derived irradiance information currently approaches a status as standard input for solar energy system analysis. Due to intrinsic limitations in spatial and temporal resolution, these data fail to give information of the full dynamics of the irradiance field in space and time. The analysis of systems with sensibility to details of the temporal evolution of the irradiance field and systems with sensibility to the spatial inhomogeneity of the field require knowledge of its fine-structured. Thus, methods for a respective enhancement of the satellite derived data are needed. This contribution presents various approaches discussed for setting up respective input data.

The Social Life of Viruses

2021

Despite their simplicity, viruses exhibit certain types of social interactions. Situations in which a given virus achieves higher fitness in combination with other members of the viral population have been described at the level of transmission, replication, suppression of host immune responses, and host killing, enabling the evolution of viral cooperation. Although cellular coinfection with multiple viral particles is the typical playground for these interactions, cooperation between viruses infecting different cells is also established through cellular and viral-encoded communication systems. In general, the stability of cooperation is compromised by cheater genotypes, as best exemplified…

Age and spatial structure of natural Pinus sylvestris stands in Latvia

2005

Abstract The age and spatial structure of six natural old growth Pinus sylvestris stands in Latvia were investigated, to attempt to identify retrospectively the past features of development. In each stand, one or two plots of size 200–900 m2 were established. Tree locations were mapped, stem diameter was measured, and tree age was determined from cores or by counting branch whorls. Tree distribution was assessed by Ripley's K function. A clumped spatial pattern was shown for P. sylvestris younger than 100 years. The temporal patterns of establishment could be partly linked to favourable climatic periods. The major disturbance affecting pine stands along the coast was windblown sand, which p…

A Geography of Coloniality: Re-narrating European Integration

2019

AbstractTurunen discusses how the “European significance” of the European Heritage Label (EHL) sites has been narrated through interconnections of European values and European integration. She argues that, in the context of the EHL, integration is intricately linked to the notion of spreading common values, which in turn is entangled with Eurocentrism. The chapter concludes with a discussion on the geography of coloniality: the underlying spatial structure that makes the coloniality of European cultural heritage and related hierarchies more visible. Ultimately, the chapter shows how the concept of coloniality enables us to analyse the ways Eurocentrism is also embedded in ideas about Europe…

Impact of real estate investment on development and functional structure of Rīga sity

2014

ANOTĀCIJA Investīcijas nekustamajā īpašumā uzskatāmas par vienu no būtiskākajiem pārmaiņu virzītājiem pēcsociālisma pilsētās, kuru telpiskā organizācija ir bijusi pakļauta intensīvai pārveidei un notikušās pārmaiņas un to radītās izmaiņas visaptverošas. Promocijas darba mērķis ir analizēt investīcijas nekustamajā īpašumā un novērtēt to ietekmi uz pilsētas telpisko un funkcionālo attīstību, izvērtējot jaunākās telpiski funkcionālās struktūras izmaiņas Rīgā. Investīciju dati analizēti kontekstā ar iedzīvotāju un nodarbināto skaita izmaiņām Rīgas pilsētas daļās, kā arī iedzīvotāju anketēšanas datiem par attieksmi pret savu dzīves vietu un ikdienas mobilitāti pakalpojumu izmantošanā. Rezultātā …

Data from: Fine-scale population dynamics in a marine fish species inferred from dynamic state-space models

2018

Identifying the spatial scale of population structuring is critical for the conservation of natural populations and for drawing accurate ecological inferences. However, population studies often use spatially aggregated data to draw inferences about population trends and drivers, potentially masking ecologically relevant population sub-structure and dynamics. The goals of this study were to investigate how population dynamics models with and without spatial structure affect inferences on population trends and the identification of intrinsic drivers of population dynamics (e.g. density dependence). Specifically, we developed dynamic, age-structured, state-space models to test different hypoth…

The role of SAXS and molecular simulations in 3D structure elucidation of a DNA aptamer against lung cancer

2021

Aptamers are short, single-stranded DNA or RNA oligonucleotide molecules that function as synthetic analogs of antibodies and bind to a target molecule with high specificity. Aptamer affinity entirely depends on its tertiary structure and charge distribution. Therefore, length and structure optimization are essential for increasing aptamer specificity and affinity. Here, we present a general optimization procedure for finding the most populated atomistic structures of DNA aptamers. Based on the existed aptamer LC-18 for lung adenocarcinoma, a new truncated LC-18 (LC-18t) aptamer LC-18t was developed. A three-dimensional (3D) shape of LC-18t was reported based on small-angle X-ray scattering…