Search results for "RICH"
showing 10 items of 3360 documents
Priekšrocības un trūkumi vācu valodas kā svešvalodas nodarbībās tiešsaistē
2021
Mana bakalaura darba mērķis ir izzināt, cik efektīvas ir vācu valodas mācības tiešsaistē no studentu un skolnieku puses. Šim nolūkam tiek tuvāk pētīts, kādas ir galvenās un visbiežāk sastopamās problēmas tiešsaistes apmācībās. Šīs pētījums balstās uz studentu un skolnieku aptaujas rezultātiem, pasniedzēju komentāriem, kā arī tiešsaistes mācību stundās izmantotiem materiāliem. Pētījuma gaitā tika secināts, ka lielākajai daļai studentu un skolnieku online mācības rada būtiskas problēmas, piemēram, mācību process aizkavējas (ir lēnāks), mācību materiāla apguvē ir vērojamas nepilnības, skolēniem un studentiem ir grūti ilgstoši koncentrēties.
Improvement of Hall Effect Current Transducer Metrological Performances in the Presence of Harmonic Distortion
2010
The performance of Hall effect current transducers (HECTs), under distorted waveform conditions, is usually characterized by means of a frequency response test. In this paper, it was investigated if frequency response is able to correctly evaluate the ratio and the phase errors under distorted conditions. Two HECTs, with the accuracy class level of 1% and 0.5%, respectively, were experimentally characterized under two conditions: 1) sinusoidal excitation with frequencies ranging from 50 to 750 Hz, which is the well-known frequency response test, and 2) nonsinusoidal excitation using fundamental frequency and one harmonic with adjusted amplitude and phase shift. It was found that ratio and p…
Rogowski coil current transducer compensation method for harmonic active power error
2015
Abstract In the harmonic active power measurement, the highest uncertainties are generally introduced by the current and voltage transducers. In a previous paper, the authors showed that the current transformer (CT) can introduce significant errors in such measurement, especially if the phase shift between voltage and current is close to ±90°. In such condition the errors on harmonic power measurement are mainly due to the CT phase displacement. This paper shows that better results can be achieved with more linear transducers, such as the Rogowski coil current transducers (RCCTs), whose metrological performance in distorted condition can be improved, by means of a proper compensation method…
Design and Characterization of a New MV PLC Coupler for Smart Electric Energy Systems
2018
This paper deals with the design, modeling and characterization of a new coupling system for medium voltage (MV) narrow band power line communications (NB-PLC). It exploits the capacitive divider of voltage detecting systems (VDSs) normally used to reveal the mains voltage presence, thus avoiding the use of dedicated MV couplers. The proposed coupling system was patented by the authors. In this paper, the modeling of the VDS capacitive divider is presented, using a proper characterization method. Moreover, the interface card design is described, based on simulation of the whole PLC transmission channel. Laboratory tests are also presented and discussed. More in detail, a frequency response …
UV Radiation and Freshwater Zooplankton: Damage, Protection and Recovery
2011
While many laboratory and field studies show that zooplankton are negatively affected when exposed to high intensities of ultraviolet radiation (UVR), most studies also indicate that zooplankton are well adapted to cope with large variations in their UVR exposure in the pelagic zone of lakes. The response mechanisms of zooplankton are diverse and efficient and may explain the success and richness of freshwater zooplankton in optically variable waters. While no single behavioural or physiological protection mechanism seems to be superior, and while several unexplained and contradictory patterns exist in zooplankton UVR ecology, recent increases in our understanding are consistent with UVR pl…
La revisione del palinsesto veronese delle Istituzioni di Gaio e le schede di Bluhme
2014
In the light of unpublished material this paper reconstructs the history of the deciphering of Gaius’ palimpsest of the Capitular Library of Verona (BCapVr, Cod. XV) by Friedrich Bluhme. It deals for the first time with other copies of Bluhme’s transcriptions preserved at the Bonn University Library (ULB, S 675f; ULB, S 1440) and with their relationship to the ones at the Berlin State Library – Prussian Cultural Heritage (SBB-PK, Ms. lat. fol. 308, K. 2, Beil. 2, Fasz. 1).
Il cammino a ritroso: Schorn, Creuzer e il significato della scultura nel «Kunst-Blatt»
2012
The article investigates the reception of Creuzer's crucial text «Symbolik und Mythologie der alten Völker, besonders der Griechen» by the editor of the German art review «Kunst-Blatt».
«L’avvocato della totalità»: Claudio Magris su Friedrich Hebbel
2019
Some of the key elements of Claudio Magris’ work as an academic surface in his writings on Friedrich Hebbel: the Danubian space, Trieste, the intersection between literature and law, totality, the relationship between literary theory and practice, revisionism of classics, the recovery of historicism as a hermeneutical tool, the legacy of György Lukacs and Scipio Slataper. In Danubio (1989) and in “Davanti alla legge” (2009), Magris discusses Hebbel’s Agnes Bernauer (1852) in terms of the power relations between the individual and the State, as a drama where history and chance work silently against the characters. The text captures Magris’ attention by virtue of Hebbel’s attempt to synthesiz…
Realistische Abrechnung mit Präexistenz und Reinkarnation. Julius von Heydens Gesprächsnovelle "Das Geheimnis der Reminiszenz"
2019
Heyden's story takes up the belief in reincarnation as an element of German idealism, as well as liberal ideas of social equality to critically disprove both of them.
On the validity of Friedrichs’ inequalities
1984
A standard proof of Friedrich's second inequality is based on contradiction argumentation. In this paper a direct proof is presented. Moreover, necessary and sufficient conditions for the validity of Friedrichs' first and second inequality are given for plane domains. peerReviewed