Search results for "conversion"
showing 10 items of 707 documents
Hybrid Energy Storage Modeling And Innovative Solutions For Energy Storage Management Systems
2022
La presente tesi riguarda la modellazione di diverse fonti di accumulo di energia elettrica, in particolare batterie e supercondensatori (SC), e di nuove configurazioni di metodi di gestione di sistemi di accumulo di energia ibridi . Il crescente bisogno di domanda di energia e il desiderio di raggiungere uno sviluppo sostenibile, si riflettono nell'uso di Generatori Distribuiti (DG) basati sulle Fonti energetiche Rinnovabili (FER). L'uso di un controllo di supervisione intelligente e il raggruppamento locale della domanda e della generazione possono portare a notevoli miglioramenti nell'efficienza, affidabilità e resilienza del sistema elettrico. Il problema principale della DG basata sull…
Up-conversion and Photoluminescence in Er3+ Single Crystal MgAl-spinel
2015
Abstract Traditional and up-conversion luminescence of MgAl 2 O 4 single crystal doped with erbium ions obtained by the Verneuil method has been investigated. The time resolved spectral measurements of the green and red up-conversion luminescence bands show that a build-up part is present in the up-conversion luminescence kinetics. This means that energy transfer process is involved in the creation of the luminescence. Considering rather small concentration of Er 3+ in the material (0.12 mass %), the expected up-conversion mechanism should be excited state absorption since the average distance between erbium ions is high. The above-mentioned considerations suggest that clustering of the act…
Spectroscopic Properties of Holmium-Aluminum- Germanium Co-doped Silica Fiber
2020
We report the basic spectroscopic properties of a home-made holmium-aluminum-germanium co-doped silica fiber, designed for laser applications. We present the ground-state and excitedstate absorption spectra of the fiber along with the upconversion emission spectrum under laser action, which served for making an energy levels’ diagram of Ho3+ ion. We discuss the ways to assess the kinetics of Ho3+ 2-μm fluorescence, focusing on measuring fluorescence lifetime from 5I7 level and nonradiative decay time from 5I6 level. The simple analytical formulae, applicable for fitting of the fluorescence decay curve, are derived, which can be useful for precise modeling of holmiumdoped fiber lasers. PID20…
La "queer theory" applicata agli schemi del diritto processuale, ossia: l'incertezza di genere dei provvedimenti in camera di consiglio in materia di…
2018
L’autore affronta il delicato e controverso tema della c.d. cameralizzazione del processo civile, indagando sulla natura, contenziosa o volontaria, di taluni specifici provvedimenti emessi nella procedura fallimentare e traendone le conseguenze in tema di ricorribilità per cassazione ex art. 111 Cost. o revocabilità. In particolare l’autore distingue, in particolare, il decreto che rigetta la conversione in fallimento di una procedura di amministrazione straordinaria ex lege Prodi da quello che riforma il provvedimento già emesso di conversione in fallimento. The author addresses the delicate and controversial theme of the so called cameralization of the civil trial, investigating the natur…
Effects of weekend starvation and the duration of daily feeding on production parameters of rainbow trout Oncorhynchus mykiss
2021
It would often be practical to starve the cultivated fishes over the weekends, e.g. to save in labour costs. We evaluated the possibility that domesticated juvenile rainbow trout (Oncorhynchus mykiss) could compensate for the lost growth of the 2-day weekend starvation by either hyperphagic response and/or by lower feed conversion ratio, compared to the fish fed every day in an 8-week experiment. Rainbow trout (initial weight c. 30 g, temperature 16 °C) starved during the weekends were able to increase feed intake during the weekdays clearly above the intake of the control fish after the first two weekends, also seen as an increase of the compensation coefficients over the last four weeks o…
CONVERSIONS DE FREQUENCE ULTRA LARGE BANDE PAR MELANGE A QUATRE ONDES INTERMODAL EN CASCADE DANS LES FIBRES MULTIMODES
2017
International audience; Nous mettons en évidence des effets de conversion spectrale paramétrique avec des décalages spectraux très importants (~200THz) dans une fibre à gradient d'indice qui, pompée avec une source laser picoseconde à 1064nm, supporte quatre modes de propagation. À travers des études expérimentales, analytiques et numériques détaillées, nous montrons que les multiples raies paramétriques sont générées par un processus en cascade complexe faisant intervenir des mélanges à quatre ondes intermodaux. Les longueurs d'onde paramétriques résultantes s'étendent dans le visible jusqu'à 410nm et dans le proche infrarouge jusqu'à 1355nm. MOTS-CLEFS : dynamique spatio-temporelle ; conv…
Pembesaran Ikan Nila (Oreochromis niloticus) pada Budidaya Sistem Resirkulasi Menggunakan Filtrasi Tanaman Hydrilla verticillata dan Ceratophyllum de…
2021
Penelitian ini mengkombinasikan tanaman Hydrilla verticillata dengan Ceratophyllum demersum sebagai filter pada budidaya ikan Nila sistem resirkulasi. Tujuan penelitian yaitu untuk mengetahui tingkat pertumbuhan ikan Nila pada budidaya sistem resirkulasi. Filtrasi yang digunakan pada budidaya sistem resirkulasi yaitu tanaman H. verticillata dan C. demersum. Metode penelitian menggunakan rancangan acak lengkap (RAL). Adapun parameter yang diamati berupa kelangsungan hidup ikan, pertumbuhan mutlak, laju pertumbuhan spesifik (SGR), Feed Conversion Ratio (FCR) dan kualitas air. Kelangsungan hidup ikan selamat pemeliharaan yaitu 100%. Pertumbuhan bobot mutlak individu berkisar 8.76 sampai 16.6 g…
Experimental test on a fuel cell-supercapacitor hybrid power supply for a digital still camera
2009
Experimental investigation of the 0⁺₂ band in ¹⁵⁴Sm as a β-vibrational band
2014
Longer wavelengths of light improve the growth, intake and feed efficiency of individually reared juvenile pikeperchSander lucioperca(L.)
2009
We tested the effects of monochromatic light on the specific growth rate (SGR), feed intake and feed efficiency (FE) of juvenile pikeperch, Sander lucioperca (L.). Pikeperch were reared individually for 42 days in aquaria covered with blue, green, yellow or red gelatin filters or white paper (control; n=5). Linear regression analysis indicated a significant positive effect of longer wavelengths of light on the condition factor (CF), FE and SGR. The final weight, SGR and CF were significantly higher in fish reared under red than under white light, and FE was better under green, yellow and red light than under white light (Dunnett's post hoc test, P<0.05) while blue was comparable to white li…