Search results for "REE"
showing 10 items of 13625 documents
Experimental Validation of Maximum Constant Boost Control and Switching Frequency Optimal for three-phase Quasi-Z-Source Converters
2020
This paper presents a modified modulation scheme for quasi-Z-Source converters, based on the Maximum Constant Boost Control (MCBC) concept and Switching Frequency Optimal (SFO) as reference signal. The effectiveness of the proposed technique is validated by comparing the obtained results (in terms of AC harmonic content and voltage stress) with those carried out from traditional modulation schemes. For this reason, a test bench has been assembled and the benefits of the SFO MCBC modulation scheme have been valuated.
Hothousing: Utilising industry collaborative problem-solving practices for STEAM in schools
2022
Collaborative problem solving (CPS) has been widely used in both industry and in schools over at least the last twenty years. The Industry Hothousing variant of CPS in its adult format is an intensive, time-constrained workshop based process designed to build mutual trust between customers and industry experts in order to synergically develop creative solutions together. Its potential use in schools raises two important questions: Firstly, what degree of structure and support is required to unleash student creativity and enhance learning - as in industry or does the student need more structured methods including explicitly being taught collaborative problem solving skills? Secondly, is CPS …
The Emotion Detectives Game: Supporting the Social-emotional Competence of Young Children
2017
The potential of digital games to enhance learning in different areas of child development has drawn increasing interest amid growing concern about children’s emotional well-being, social-emotional difficulties, and problem behaviors alongside diminishing economic resources for intervention and habilitation. However, digital games designed to promote social-emotional competence are surprisingly scarce. In this chapter, we explore children’s use of the digital game Emotion Detectives (ED), designed to promote children’s acquisition of emotional knowledge skills (e.g., recognizing, appreciating, and understanding emotions and their expressions), prosocial behaviors (e.g., helping, sharing, co…
Relationaalinen dialektiikka työyhteisön vertaissuhteissa
2017
Tässä maisterintutkielmassa tarkasteltiin relationaalisen dialektiikan teoriaa ja analysoitiin sen sovellusmahdollisuuksia työyhteisöjen vuorovaikutussuhteiden tutkimukseen. Tutkielman tavoitteena oli kuvata, analysoida ja arvioida relationaalisen dialektiikan teoriaa ja sen soveltuvuutta työyhteisön vertaissuhteiden tutkimiseen. Tutkielma toteutettiin teoreettisena analyysina. Tutkielman aineisto koostui relationaalista dialektiikan teoriateoksista sekä tutkimusartikkeleista, joissa relationaalisen dialektiikan teoriaa on sovellettu työyhteisöjen vuorovaikutus– suhteiden tutkimiseen. Baxterin ja Montgomeryn relationaalisen dialektiikan teoria selittää vuorovaikutussuhteiden luontaista jänn…
Sysmä Community Currency: An Analysis of its Success from the Perspectives of Purposes, Stakeholders and Promotion
2019
Artikkeli on tapaustutkimus paikallisrahajärjestelmästä, jota kokeiltiin äskettäin maalaisympäristössä Sysmän kunnassa. Paikallisraha on yksi innovaatiivisista aloitteista, joita kunta on tehnyt tällä vuosituhannella torjuakseen jo 1960-luvulta alkaen käynnissä ollutta väestökatoa. Tässä artikkelissa tutkitaan paikallisrahan käynnistysvaihetta siihen sisältyneiden ristiriitojen näkökulmasta. Artikkelissa todetaan, että järjestelmä kärsi epäselvästä tavoitteenasettelusta, ja että eri osallisilla oli tavoittesta vaihtelevia ja ristiriitaisia käsityksiä. Paikallisrahan sosiaalista hyväksyntää heikensivät päätös rajoittaa rahaa vastaanottavien yritysten joukko kunnassa kirjoilla oleviin yrityks…
The wage curve and local monopsony power
2019
AbstractUsing longitudinal micro-data from Finland, a country with a geographically dispersed population and relatively long distances between local labor markets, this paper examines the responsiveness of the pay level to local unemployment conditions. In particular, this study tests the hypothesis that the pay level is more responsive to the unemployment level in less agglomerated and more remote regions as might be expected if employers have a higher degree of monopsony power in such regions. The results consistently suggest that the pay level is lower in localities with a higher unemployment level and, hence, provide strong support for the so-called wage curve hypothesis, which predicts…
Towards a new protocol for field measurements of greenhouse gases from wastewater treatment plant
2016
Emissions into the atmosphere of greenhouse gases (GHGs), i.e., carbon dioxide, methane and nitrous oxide from wastewater treatment plants are of increasing concern in the water industry. In order to produce useful and comparable information for monitoring, assessing and reporting GHG emissions from wastewater treatment plants, there is a crescent need for a general accepted methodology. This paper aims at proposing the first protocol for monitoring and accounting GHG emissions from wastewater treatment plants taking into account both direct and internal indirect emissions focusing on sections known to be major responsible of GHG emissions i.e. oxidation tanks and sludge digestion. The main…
Geochemical characterization of trace elements in thermomineral waters of Greece
2020
Trace elements have a fundamental role in natural and anthropogenic systems. In waters, they present a great variability of concentrations that mostly depends on the degree of gaswaterrock interactions and geochemical conditions such as pH, temperature, redox and/or exchange reactions, etc. Even though, they are present in very low contents in hostrocks, elevated concentrations in ground or surface waters may have a hazardous impact on human and animal health and thus, it is important to both quantify and try to understand their behaviour in natural systems. Here we present the results of about 300 cold and thermal mineral waters collected along the entire Hellenic territory. Physicochemica…