Search results for "Power"
showing 10 items of 5099 documents
Lastentarhanopettajien huippukokemukset työhyvinvointia rakentamassa
2010
Tutkimus tarkastelee lastentarhanopettajien työhön liittyviä huippukokemuksia. Teoreettisena lähtökohtana toimii Csikszentmihalyin flowkäsite. Ilmiötä lähestytään kolmen tutkimusongelman avulla, joilla selvitetään huippukokemusten ominaisuuksia, työtiimin ja -yhteisön merkitystä niiden ilmenemiseen sekä huippukokemusten yhteyttä työhyvinvointiin. Tutkimuksen tarkoituksena on ollut löytää työhyvinvointiin vaikuttavia tekijöitä ja mahdollisia keinoja hyvinvoinnin lisäämiseksi päiväkotikontekstissa. Lastentarhanopettajien työhön liittyvät huippukokemukset eli työhön uppoutumisen hetket olivat erityisiä kokemuksia ja ne erosivat arkisesta työnilosta. Tilanteisiin sisältyi onnistumisen ja pystyv…
Miten opettaja rakentaa pedagogisen auktoriteetin? Otteita opettajan arjesta
2002
Laadullisen tutkimuksen päätavoitteena oli pureutua siihen, miten opettaja ymmärtää ja rakentaa pedagogisen auktoriteettinsa koulun arjessa. Koska auktoriteettisuhde ei todennu ajatuksissa, puheessa ja kuvitelmissa, tutkin myös, miten auktoriteetti toimii ja saa oikeutuksen luokkatilanteessa. Pedagoginen auktoriteetti liitetään taustakirjallisuudessa toisaalta varsinaisen vallankäytön ulkopuoliseen, kasvatukseen liittyvään auktoriteettisuhteeseen, toisaalta korostetaan henkilösuhteen merkitystä auktoriteettisuhteen muotoutumisessa. Työn peruskysymys on sama kuin työn nimi: Miten opettaja rakentaa pedagogisen auktoriteetin? Osakysymyksiä ovat seuraavat: Mitä ilmiöön pedagoginen auktoriteetti…
Waste heat recovery from a marine waste incinerator using a thermoelectric generator
2012
Published version of an article published in the journal: Journal of Electronic Materials. Also available from the publisher at: http://dx.doi.org/10.1007/s11664-012-2009-6 A marine waste incinerator has been evaluated for waste heat harvesting using thermoelectric generators (TEG). The application has been evaluated using mathematical modeling to optimize the heat exchanger and some vital design parameters of the TEG. The calculation shows that it is possible to extract 58 kW el at a price of 6.6 US$/W from an 850-kW th incinerator when optimizing for maximum power. However, minimizing the cost, it is possible to get 25 kW el at a price of 2.5 US$/W. A trade-off between the two targets lea…
NH4HCO3–water solutions regeneration in RED closed loop applications
2017
Reverse Electrodialysis (RED) in closed loop arrangement (Reverse Electrodialysis Heat Engine - REDHE) is a promising technology to convert low-grade waste heat into electricity. RED is a membrane process exploiting the salinity gradient between a concentrated and a diluted solution to generate electrical current. Due to the transfer phenomena occurring in the RED unit, the two exiting solutions are partially mixed. Thermal regeneration processes can be used to restore the initial conditions of the two solutions, thus closing the loop. In this regard, ammonium hydrogen carbonate (NH4HCO3) salt solutions are suitable for such applications, being able to decompose at temperatures above 40-45 …
REVERSE ELECTRODIALYSIS FOR POWER PRODUCTION FROM OILFIELD WASTEWATERS
2022
Produced waters (PWs) are wastewaters generated by crude-oil extraction processes. They can present very different characteristics depending on the field location and production process. Dispersed oil, dissolved organics and solid particles are usually the main components. Moreover, PWs can contain a very high quantity of dissolved salts 1, with a total dissolved solid (TDS) concentration up to 300 g/L. Each barrel of extracted oil requires the simultaneous extraction of 3 barrels of produced water2 on average. PWs are often discharged into the sea, or sent in evaporation ponds thus leading to a dramatic environment impact3. Reinjection in the extraction well is currently the most common an…
Evaluation of the wave energy density on the Sicilian coast
2016
In this article the wave energy density of the northern Sicilian coasts is evaluated and is used to evaluate the producibility of a wave nergy converter to be installed in an area in the north west part of Sicily. In particular, the objective of the study is the evaluation of a potential installation in an area between Trapani and Palermo, which are the largest cities in the north west part of Sicily. In particular in this research, the wave energy density of Sicily has been analyzed by using an analysis of wave data carried out in a 10-year period, using the measurements of buoyant of National Wave measuring System (RON - Rete Ondametrica Nazionale). The analysis shows that the north-weste…
Estimation of wind velocity over a complex terrain using the Generalized Mapping Regressor
2010
Abstract Wind energy evaluation is an important goal in the conversion of energy systems to more environmentally friendly solutions. In this paper, we present a novel approach to wind speed spatial estimation on the isle of Sicily (Italy): an incremental self-organizing neural network (Generalized Mapping Regressor – GMR) is coupled with exploratory data analysis techniques in order to obtain a map of the spatial distribution of the average wind speed over the entire region. First, the topographic surface of the island was modelled using two different neural techniques and by exploiting the information extracted from a digital elevation model of the region. Then, GMR was used for automatic …
Resource Allocation and Computation Offloading for Wireless Powered Mobile Edge Computing
2022
In this paper, we investigate a resource allocation and computation offloading problem in a heterogeneous mobile edge computing (MEC) system. In the considered system, a wireless power transfer (WPT) base station (BS) with an MEC sever is able to deliver wireless energy to the mobile devices (MDs), and the MDs can utilize the harvested energy for local computing or task offloading to the WPT BS or a Macro BS (MBS) with a stronger computing server. In particular, we consider that the WPT BS can utilize full- or half-duplex wireless energy transmission mode to empower the MDs. The aim of this work focuses on optimizing the offloading decision, full/half-duplex energy harvesting mode and energ…
Wola mocy w architekturze. Inspiracje Nietzscheańskie
2021
Po przedstawieniu swej interpretacji greckiej tragedii, w której współdziałają apollińskość i dionizyjskość, Nietzsche koncypował całościową teorię sztuki, w której zasadniczą rolę odgrywa wola mocy. Coraz bardziej pociągała go też idea architektury jako sztuki tworzonej z woli mocy i obejmującej najwyższe dążenia człowieka. Można przyjąć, że w przestrzeni architektonicznej apollińskość jest pięknem, a dionizyjskość jest wzniosłością. Oba żywioły dialektycznie syntetyzują się w postaci woli mocy będącej najpotężniejszą formą żywiołowości. Właśnie ona powołuje do życia wielką sztukę, która wspiera człowieka w jego przeobrażaniu się w nadczłowieka. Aby ta przemiana ontologiczna doszła do skut…
The Influence Mechanism of Supervisor Developmental Feedback on the Enactment of Employees’ Creative Ideas: A Moderated Chain Mediation Model Based o…
2021
Employees’ creative idea enactment is critical for organizational creativity assessment and innovation implementation. In the paper, we want to develop and verify a moderated chain mediation model to explore the impact of supervisor developmental feedback on the enactment of employees’ creative ideas, and to investigate the moderating role of psychological empowerment further. Hierarchical regression analyses of the multi-time data from 375 employees in China indicate that positive emotions and work engagement, respectively mediate the relationship between supervisor developmental feedback and employees’ creative idea enactment. Simultaneously, positive emotions and work engagement form cha…