A Network of ThemesNarvika Bovcon
, Aleš Vaupotič
, 2017, izvirni znanstveni članek
Opis: Gerhard Richter's books Text – a collection of painter's verbal statements about his artistic method – and Atlas – 783 sheets with images, mainly photographs and visual notations – are two archives that complement the understanding of his diverse artistic practice. The paper presents a textual model that experimentally simulates a possible ordering principle for archives. Richter's statements in the book Text are cut up and used as short quotations. Those that relate to multiple aspects of the painter's oeuvre are identified as hubs in the semantic network. The hubs are organized paratactically, as an array of different themes. The paper presents a methodological hypothesis and an experimental model that aim to connect the research of real networks with the paradigms of humanistic interpretation. We have to bear in mind that the network is a result of the researcher's interpretative approach, which is added to the initial archive included in the book Text. The breaking up of Richter's poetics into atoms of quotations is an experimental proposal of a new textuality in art history and humanities, which has its own history. In comparison to digital archives with complex interfaces that often tend to obscure the content, the elements in our experiment appear as specific configurations of the semantic network and are presented in a limited number of linear texts. The method of listing of quotations gathers the fragments into a potential “whole”, i.e. a narrativized gateway to an archive according to the researcher's interpretation.
Ključne besede: artistic archive, narrativization, networks, author's poetics, Gerhard Richter
Objavljeno: 11.07.2017; Ogledov: 190; Prenosov: 5
Polno besedilo (400,90 KB)
Hyperrings with n -ary composition hyperoperationMorteza Norouzi
, Irina Cristea
, 2017, izvirni znanstveni članek
Opis: Based on the concepts of composition ring and composition hyperring, in this note we introduce the notion of $n$-ary composition hyperring and study the connections with composition hyperrings. Moreover we show that special strong multiendomorphisms of hyperrings can determine the
$n$-ary composition structure of a such hyperring and also a subclass of $n$-ary composition hyperrings. Finally, the three isomorphism theorems are studied in the framework of $n$-ary composition hyperrings.
Ključne besede: n-ary hypergroup, (m, n)-hyperring, composition hyperring, n-ary composition hyperideal
Objavljeno: 10.07.2017; Ogledov: 172; Prenosov: 0
Polno besedilo (355,83 KB)
Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type AnalysisŠpela Koren
, Manca Kovač Viršek
, Petra Makorič
, Maryline Pflieger
, 2017, pregledni znanstveni članek
Opis: Plastic resin pellets, categorized as microplastics (≤5 mm in diameter), are small granules that can be unintentionally released to the
environment during manufacturing and transport. Because of their environmental persistence, they are widely distributed in the oceans and
on beaches all over the world. They can act as a vector of potentially toxic organic compounds (e.g., polychlorinated biphenyls) and might
consequently negatively affect marine organisms. Their possible impacts along the food chain are not yet well understood. In order to assess the
hazards associated with the occurrence of plastic pellets in the marine environment, it is necessary to develop methodologies that allow for rapid
determination of associated organic contaminant levels. The present protocol describes the different steps required for sampling resin pellets,
analyzing adsorbed organochlorine pesticides (OCPs) and identifying the plastic type. The focus is on the extraction of OCPs from plastic pellets
by means of a pressurized fluid extractor (PFE) and on the polymer chemical analysis applying Fourier Transform-InfraRed (FT-IR) spectroscopy.
The developed methodology focuses on 11 OCPs and related compounds, including dichlorodiphenyltrichloroethane (DDT) and its two main
metabolites, lindane and two production isomers, as well as the two biologically active isomers of technical endosulfan. This protocol constitutes
a simple and rapid alternative to existing methodology for evaluating the concentration of organic contaminants adsorbed on plastic pieces.
Ključne besede: Environmental Sciences, Issue 125, Microplastics, resin pellets, pesticides, persistent organic pollutants, organochlorine pesticides, dichlorodiphenyltrichloroethane, endosulfan, hexachlorocyclohexane, lindane, Fourier transform infrared spectroscopy, pressurized fluid extractor
Objavljeno: 10.07.2017; Ogledov: 227; Prenosov: 0