Search results for "Power"

Dielectric properties of water/lecithin/cyclohexane gels

1993

Dielectric relaxation measurements in the frequency range 0.1–15 GHz have been carried out on water/lecithin/cyclohexane gels using a time domain reflectometry method (TDR). Dielectric dispersions describable in terms of a power law typical of percolated systems, but with exponents significantly different from those characterizing statically or dynamically percolated systems are observed. The dielectric dispersions, attributed to water and/or lecithin head group rotational motions, indicate that these motions are characterized by a wide spectrum of relaxation times.

Application of Potassium Ion Impregnated Titanium Dioxide as Nanocatalyst for Transesterification of Linseed Oil

2018

The current work comprises the investigation of biodiesel production from linseed oil using TiO2 and a potassium L-tartrate monobasic (C4H5KO6)-modified TiO2 nanocatalyst. Different amounts of C4H5KO6 were considered for TiO2 modification. The nanocatalyst TiO2–0.5C4H5KO6 (1:0.5 molar ratio) showed the best conversion rate for biodiesel production. The nanocatalyst was characterized by FTIR, XRD, TEM, BET, and XPS, and the Hammett indicator–benzenecarboxylic acid titration method was used for basicity measurement. The biodiesel was characterized by GC-MS and 1H and 13C NMR. Furthermore, the optimum reaction parameters for transesterification reaction were analyzed, and the yield was determi…

Before appeasement : Stresa Conference and the failure of the common security in Europe as reported by the Manchester Guardian and Neuer Vorwärts in …

2021

The research of my thesis has been focused on the 1935 diplomatic conference at Stresa, in Northern Italy and observe how this meeting between the representatives of the United Kingdom, France and Italy shaped the diplomatic relations in interwar Europe. The goal of this meeting was to formulate a common policy against Germany in reaction to the founding of the German air force. This action, which reneged on the 1919 treaty of Versailles caused great worry in Europe. The aim of my research has been to examine developments that rose from this and examine what measures the tripartite powers adopted in opposition to the German aims of territorial expansion and confrontation with the neighbouri…

Ekscentriskā fotorefraktometra "PowerRef 3" kalibrēšana

2018

Bakalaura darbs ir uzrakstīts latviešu valodā uz 26 lapaspusēm. Tas satur 17 attēlus un 19 atsauces uz literatūras avotiem. Darba mērķis bija noskaidrot ierīces “PowerRef 3”, kas atrodas Latvijas Universitātes Optometijas un redzes zinātnes nodaļā, precizitāti izmantojot relatīvās kalibrēšanas metodi. Papildus ierīces kalibrēšanai tika veikti akomodācijas izmaiņu mērījumi cikloplēģijas iespaidā. Dati tika iegūti izvērtējot dalībnieku labo aci monokulāros apstākļos. Relatīvās kalibrēšanas metodes laikā katrs mērījums tika veikts 10 sekundes. Tika iegūti rezultāti, kas nosaka, ka ierīce “PowerRef 3” ir atbilstoša ierīces rokas grāmatā noteiktajām specifikācijām.

Framing by Actors in the Human Rights Debate: the Kony 2012 Campaign

2014

Human rights actors form networks and debate in issue arenas to find solutions to violations. Framing can be used to create and increase issue salience as well as organisational importance, thus influencing power relations and the human rights debate. Not all the actors are equally powerful, meaning that the more dominant actors function as gatekeepers, controlling the debate and the subsequent decision-making process. The campaign Kony 2012 by Invisible Children (IC) is used as a case study to see whether, by observing the reaction the campaign elicited from two well-established gatekeepers (Amnesty International and Human Rights Watch), this campaign by a previously relatively unknown non…

Experimental test on a fuel cell-supercapacitor hybrid power supply for a digital still camera

2009

Ogniwa paliwowe i mikrobiologiczne ogniwa paliwowe - zastosowanie druku 3D

2018

Technologie ogniw paliwowych i mikrobiologicznych ogniw paliwowych mogą stać się w przyszłości jednymi z dominujących technologii wytwarzania energii elektrycznej. Konieczne są więc badania związane z tymi technologiami. Technologią, która może usprawnić prowadzenie badań w tym zakresie jest technologia druku 3D. Pozwala ona na wykonywanie dowolnych kształtów w jednym egzemplarzu. Ponadto koszt projektu i wydruku jest stosunkowo niski. Dzięki tej technologii można znacznie przyspieszyć prowadzenie badań z zakresu ogniw paliwowych i mikrobiologicznych ogniw paliwowych. Praca przedstawia wykorzystanie druku 3D w badaniach nad ogniwami paliwowymi i mikrobiologicznymi ogniwami paliwowymi prowad…

Testing warm Comptonization models for the origin of the soft X-ray excess in AGNs

2018

The X-ray spectra of many active galactic nuclei (AGN) show a soft X-ray excess below 1-2 keV on top of the extrapolated high- energy power law. The origin of this component is uncertain. It could be a signature of relativistically blurred, ionized reflection, or the high-energy tail of thermal Comptonization in a warm (kT $\sim$ 1 keV), optically thick ($\tau\simeq$ 10-20) corona producing the optical/UV to soft X-ray emission. The purpose of the present paper is to test the warm corona model on a statistically significant sample of unabsorbed, radio-quiet AGN with XMM-newton archival data, providing simultaneous optical/UV and X-ray coverage. The sample has 22 objects and 100 observations…

Fuzzy logic controller and game theory based distributed energy resources allocation

2020

Energy management and demand control through conventional energy generation sources are challenging for energy providers. Distributed energy resources (DERs) allocation near load centers may provide a suitable solution. The main contribution of the paper improves the voltage profile and reduce the active and reactive power losses in the distribution network. DERs are integrated with IEEE 33 bus system using fuzzy logic controller (FLC) and game theory for two different cases with unity and 0.9 power factor (PF) and compares with conventional methods of integration (i.e., modified novel method, power loss sensitivity method, voltage sensitivity analysis method). The capacity of DERs is optim…

Hybrid Propulsion Efficiency Increment through Exhaust Energy Recovery—Part 2: Numerical Simulation Results

2023

The efficiency of hybrid electric vehicles may be substantially increased if the energy of exhaust gases, which do not complete the expansion inside the cylinder of the internal combustion engine, is efficiently recovered using a properly designed turbo-generator and employed for vehicle propulsion. Previous studies, carried out by the same authors of this work, showed a potential hybrid vehicle fuel efficiency increment up to 15% employing a 20 kW turbine on a 100 HP-rated power thermal unit. The innovative thermal unit proposed here is composed of a supercharged engine endowed with a properly designed turbo-generator, which comprises two fundamental elements: an exhaust gas turbine expres…