Search results for "TG"
showing 10 items of 2275 documents
Bērza tāss ekstrakta savietojamība ar farmācijā izmantojamām palīgvielām
2019
Darbā analizēta literatūra par bērza tāss ekstraktu, farmācijā izmantojamām palīgvielām un vielu savietojamības pētīšanas metodēm. Pētnieciskā darba ietvaros analizēta bērza tāss ekstrakta savietojamība ar dažādām farmācijā izmantojamām palīgvielām.
Valūtas kursa volatilitātes prognozēšana, izmantojot GARCH modeļus
2017
Valūtas kursa prognozēšana ir daudzu pētījumu objekts. Pasaulē viss mainās un cenas finanšu tirgū nav izņēmums, un nepieciešamība prognozēt tās izmaiņas kļuva vēl lielāka. Tādi tradicionālie modeļi kā ARMA ne vienmēr var adekvāti aprakstīt finanšu laikrindu ar tās īpatnībām. Tādēļ ir nepieciešams paplašināt tādus modeļus. Viena no valūtas kursa īpatnībām ir volatilitāte. Šis termins ir lietots, lai apraskstītu cenu svārstības. Vispārinātie nosacītas heteroskedastivitātes autoregresijas modeļi (GARCH) bieži tiek lietoti volatilitātes pētījumiem, lai atklātu sviras efektus, asimetrijas efektus vai klasteru veidošanas efektus. Darbā tiek izveidoti un aplūkoti GARCH, EGARCH un TGARCH modeļi tri…
A GIS-based optimization model finalized to the localization of new power-to-gas plants: The case study of Sicily (Italy)
2022
In 2020 the European Commission approved the GND (Green New Deal), a strategic plan aimed at the decarbonization of the EU by 2050. In this scenario, the diffusion of alternative renewable energy sources (RESs) play a key role, particularly electric energy production from wind and photovoltaic power plants. Regardless, the nonprogrammable nature of these power sources led recent studies to focus the interest on the power-to-gas solution (PtG), consisting of the electrolytic transformation of excesses of unused electric energy into hydrogen. The complexity of this technology requires the development of strategic optimization models aimed at finding the best locations for new PtG plants in sp…
GPRS Security for Smart Meters
2013
Part 1: Cross-Domain Conference and Workshop on Multidisciplinary Research and Practice for Information Systems (CD-ARES 2013); International audience; Many Smart Grid installations rely on General Packet Radio Service (GPRS) for wireless communication in Advanced Metering Infrastructures (AMI). In this paper we describe security functions available in GPRS, explaining authentication and encryption options, and evaluate how suitable it is for use in a Smart Grid environment. We conclude that suitability of GPRS depends on the chosen authentication and encryption functions, and on selecting a reliable and trustworthy mobile network operator.
RAB3GAP1 and RAB3GAP2 modulate basal and rapamycin-induced autophagy
2014
Macroautophagy is a degradative pathway that sequesters and transports cytosolic cargo in autophagosomes to lysosomes, and its deterioration affects intracellular proteostasis. Membrane dynamics accompanying autophagy are mostly elusive and depend on trafficking processes. RAB GTPase activating proteins (RABGAPs) are important factors for the coordination of cellular vesicle transport systems, and several TBC (TRE2-BUB2-CDC16) domain-containing RABGAPs are associated with autophagy. Employing C. elegans and human primary fibroblasts, we show that RAB3GAP1 and RAB3GAP2, which are components of the TBC domain-free RAB3GAP complex, influence protein aggregation and affect autophagy at basal an…
Istutuspäällikkö Gaddin julkiset matkaraportit 1763–1765
2022
Artikkelissa tarkastellaan Inrikes Tidningarissa julkaistuja raportteja Pehr Adrian Gaddin (1727–1797) matkoista Suomessa vuosina 1763–1765. Tekstit sekä rikastavat käsitystä Gaddin toiminnasta istutuspäällikkönä että antavat esimerkin mahdollisesta julkisuuden käytöstä vapaudenajan lopun Ruotsissa.
L’appropriation territoriale des nouvelles gares TGV périphériques françaises au miroir des SCOT (Schéma de Cohérence Territoriale)
2019
International audience; Face à la grande diversité des dynamiques territoriales liées à la grande vitesse ferroviaire et aux difficultés rencontrées pour isoler l’influence de la nouvelle offre de transport des autres facteurs intervenant dans les évolutions socio-économiques et spatiales des territoires, les chercheurs s’attachent désormais davantage à la compréhension des processus par lesquels naissent les changements territoriaux en questionnant la façon dont les acteurs territoriaux s’approprient à travers leurs comportements, leurs pratiques et leurs représentations, la nouvelle offre de transport. Comme l’ont montré de nombreux travaux, l’infrastructure et les nouvelles conditions d’…
Polymorphism in Developmental Mode and Its Effect on Population Genetic Structure of a Spionid Polychaete, Pygospio elegans
2012
Population genetic structure of sedentary marine species is expected to be shaped mainly by the dispersal ability of their larvae. Long-lived planktonic larvae can connect populations through migration and gene flow, whereas species with nondispersive benthic or direct-developing larvae are expected to have genetically differentiated populations. Poecilogonous species producing different larval types are ideal when studying the effect of developmental mode on population genetic structure and connectivity. In the spionid polychaete Pygospio elegans, different larval types have been observed between, and sometimes also within, populations. We used microsatellite markers to study population st…
Effect of sodium borohydride and hydrogen peroxide pretreatments on soda pulping of sugar maple (Acer saccharum)
2021
For recovering value-added wood-based organic material prior to delignification, sodium borohydride (NaBH4) and hydrogen peroxide (H2O2) pretreatments under alkaline conditions were performed before soda pulping of sugar maple (Acer saccharum) chips with sodium hydroxide (NaOH). In this investigation, it was determined whether the pulp yield could be increased by partly stabilizing the hemicelluloses by these pretreatments, and simultaneously obtains lower pulp kappa numbers. The results indicated that when aiming to the same kappa numbers (i.e., kappa numbers 14.3-20.5), roughly 3% higher pulp yield could be achieved if the chips were pretreated with alkaline 0.5% NaBH4 solutions, compared…
GUI Implementation of VCDtools, A Program to Analyze Computed Vibrational Circular Dichroism Spectra
2020
As computing power increases, vibrational circular dichroism (VCD) calculations on molecules of larger sizes and complexities become possible. At the same time, the spectra resulting from these computations become increasingly more cumbersome to analyze. Here, we describe the GUI implementation into the Amsterdam Density Functional (ADF) software package of VCDtools, a toolbox that provides a user-friendly means to analyze VCD spectra. Key features are the use of the generalized coupled oscillator analysis methods, as well as an easy visualization of the atomic electric and magnetic transition dipole moments which together provide detailed insight in the origin of the VCD intensity. Using s…