Search results for "gsi"
showing 9 items of 59 documents
Pamphagidae (Orthoptera: Caelifera) of North Africa: key to genera and the annotated check-list of the species.
2013
At least 95 species of Pamphagidae belonging to 17 genera are known in North Africa. Taxonomic status is fairly known, with some exception, mainly due to scarcity of available specimens of some genera in museums and collections. In this paper, the author proposes a new key to genera and reports the annotated list of all the known species, based on specimens examined in different European museums. Concerning the subfamily Thrinchinae, he proposes to consider only the following species of the genus Tmethis: T. cisti, T. harterti new status, T. maroccanus and T. pulchripennis. He also considers Neotmethis bidentatus synonym of T. harterti, and the three newly described species of the genus Tua…
Contatti culturali, identità e popolamento nel territorio imerese
2016
Il lavoro prende in considerazione il problema dei rapporti tra coloni greci e comunità indigene nel territorio di Himera, sulla base dei risultati della prospezione archeologica condotta per tre decenni nelle valli dei fiumi Imera settentrionale, Torto e S. Leonardo. Vengono esaminati gli elementi di cultura materiale che permettono di definire i modi dell'interazione culturale tra coloni e indigeni, nonché di ricostruire i paesaggi politici, socio-economici e il paesaggio del sacro nelle diverse aree indagate e nei diversi comprensori. La ricerca infatti permette di delineare, oltre alle usuali organizzazioni insediative e agricole della chora politiké e della éremos chora, anche articola…
Assessment of protection treatments for carbonatic stone using nanocomposite coatings
2020
In this paper the effect of the application of four kinds of polymer dispersions containing nanoparticles, used as protectives, on two type of carbonatic lithotypes, White Noto and Comiso stone, is reported. The study was conducted by analysing the contribution of each component of the system. After the structural characterization of the coating itself, the performance of those colloidal systems has been studied upon application on the calcarenites, preferring non-invasive techniques and microdestructive techniques. Effect of the nanoparticles presence on hydrorepellency and roughness of the stone surface and on chromatic changes has also been considered. The tests conducted have proven tha…
Technicolor and new matter generations
2010
This work consists of an overview part and three research papers. The subject of this work is a class of models for dynamical electroweak symmetry breaking, and new generations of fermionic matter. An introductory overview of the standard model of electroweak interactions is given, as well as an overview of some of the recent developments in the field of walking technicolor models. We study some recently proposed models for dynamical electroweak symmetry breaking, namely the minimal walking technicolor (MWT) and next to minimal walking technicolor (NMWT) model. We show that, as a result of cancellation of the global and gauge anomalies associated with the technicolor sector, a non sequentia…
Transitions in European land-management regimes between 1800 and 2010
2015
Land use is a cornerstone of human civilization, but also intrinsically linked to many global sustainability challenges—from climate change to food security to the ongoing biodiversity crisis. Understanding the underlying technological, institutional and economic drivers of land-use change, and how they play out in different environmental, socio-economic and cultural contexts, is therefore important for identifying effective policies to successfully address these challenges. In this regard, much can be learned from studying long-term land-use change. We examined the evolution of European land management over the past 200 years with the aim of identifying (1) key episodes of changes in land …
Dažādās pieejās bāzētu dialogu sistēmu integrēšanas metožu izpēte un izmantošanas iespējas apdrošināšanas sfērā
2019
Maģistra darba mērķis ir izpētīt dažādas pieejas dialogsistēmu izveidē, to integrēšanas metodes, veidojot hibrīdas dialogsistēmas, un to izmantošanas iespējas apdrošināšanas jomā, izstrādājot attiecīgu prototipu un salīdzinot to ar tradicionālu dialogsistēmu. Darbā tika izpētīti dažādu dialogistēmu veidi un to izstrādes ietvari, lai novērtētu tos un izvēlētu vienu darba praktiskās daļas veikšanai. Praktiskajā daļā izstrādāti divi dialogsistēmu prototipi, kas veic vienu funkciju – apdrošināšanas atlīdzības pietiekšanu. Viens no prototipiem izmanto vadītas sarunas principu. Savukārt, otrs prototips atbilst hibrīdai dialogsistēmai – tā ne tikai nodrošina apdrošināšanas atlīdzības pietiekšanu, …
Beyond the standard model via extended symmetries and dark matter
2015
In this thesis, we discuss ideas of how to go beyond the Standard Model (SM) of particle physics to incorporate the cosmological observations of dark matter and matter–antimatter asymmetry, and to address the theoretical problems related to the scalar sector of the SM. Although the SM has proven to be an excellent description of the interactions of elementary particles, there is both experimental and theoretical evidence that this description cannot be complete. Most notably, the cosmological observations of dark matter (DM) and the matter–antimatter asymmetry in the universe cannot be explained within the SM. We have studied simple singlet extensions of the SM. We found out that these DM a…
A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR
2018
The GEM-TPC [1] described herein will be part of the standard beam-diagnostics equipment of the Super-FRS [2] . This chamber will provide tracking information for particle identification at rates up to 1 MHz on an event-by-event basis. The key requirements of operation for these chambers are: close to 100% tracking efficiency under conditions of high counting rate, spatial resolution below 1 mm and a superb large dynamic range covering projectiles from Z=1 up to Z=92. The current prototype consists of two GEM-TPCs inside a single vessel, which are operating independently and have electrical drift fields in opposite directions. The twin configuration is done by flipping one of the GEM-TPCs o…
Ca-48+Bk-249 Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying (270)Db and Discovery of Lr-266
2014
The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope 294117 and its decay products. A hitherto unknown α-decay branch in 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-live…