Search results for "MPP+"

Lapsen oppimissuunnitelma : etnografinen seurantatutkimus eräässä päiväkoti-koulukontekstissa

2014

Comprehensive Analytical Investigation for PV Plants and Their Control System with Reduced Power Electronics Equipments

2012

This paper presents a comprehensive analysis of a power generation system from PV source and it control system with a reduced power equipments connected with a power AC grid. The absence of the boost chopper as an actuator for Maximum Power Point Tracking concurs to make the system more reliable, affordable and moreover cheaper respect to a traditional one in which the boost chopper is used. The mathematical analysis exposed in the paper shows as a three phase inverter has two degrees of freedom allowing the simultaneous MPPT control and the synchronization with the power grid. The analysis also shows the way to determine the duty cycle of the inverter to deliver active power, and eventuall…

Kumppanuus alueellisen kehittämisen hallintana : Suomi ja muut Pohjoismaat

2002

Institutional Learning in North–South Partnerships: Critical Self-Reflection on Collaboration Between Finnish and Tanzanian Academics

2020

Knowledge production and its possibilities and pitfalls in North-South research partnerships have gained increasing attention. The previous literature has identified certain pervasive challenges, and suggested a variety of ways to change partnerships, ranging from improvement of current collaboration activities to fundamental transformation of the hegemonic Eurocentric criteria for knowledge. Against this backdrop, we ask what kinds of learning can take place in research partnerships. We draw from two sources – an institutional approach and a classical categorization of learning proposed by Gregory Bateson – to develop a heuristic for analyzing institutional learning in North-South research…

Analytical Investigation and Control System Set-up of Medium Scale PV Plants for Power Flow Management

2012

In the field of photovoltaic (PV) plants and energy conversion from renewable sources, a large part of the technical literature is more devoted to practical aspects (new solar cells, electrically driven PV panels, safety, reduction of parasitic currents, etc.) than to theoretical investigations. Despite this tendency, this paper presents a mathematical analysis of a medium scale photovoltaic power generation system connected to the distribution network and of its control system. In such a system, the conversion stage is unique due to the absence of a boost chopper. The conducted analysis leads to the interesting conclusion that the inverter used in the plant presents two degrees of freedom,…

Phonon Driven Floquet Matter.

2018

The effect of electron–phonon coupling in materials can be interpreted as a dressing of the electronic structure by the lattice vibration, leading to vibrational replicas and hybridization of electronic states. In solids, a resonantly excited coherent phonon leads to a periodic oscillation of the atomic lattice in a crystal structure bringing the material into a nonequilibrium electronic configuration. Periodically oscillating quantum systems can be understood in terms of Floquet theory, which has a long tradition in the study of semiclassical light-matter interaction. Here, we show that the concepts of Floquet analysis can be applied to coherent lattice vibrations. This coupling leads to p…

Miten kymmenjärjestelmä hallitaan peruskoulun viidennellä luokalla?

2014

Ilonen, L. & Kangas, P. 2014. Miten kymmenjärjestelmä hallitaan peruskoulun viidennellä luokalla? Jyväskylän yliopisto. Kokkolan yliopistokeskus Chydenius. Kasvatustieteen pro gradu –tutkielma. 68 s. ja 3 liitettä. Kymppi-kartoitus on materiaali, jota voidaan käyttää kymmenjärjestelmän osaamisen kartoittamiseen perusopetuksessa. Tutkimuksen tarkoituksena oli selvittää Kymppi-kartoituksen avulla kymmenjärjestelmän hallintaa peruskoulun viidennellä luokalla. Kohdejoukkona oli erään pirkanmaalaisen koulun 79 viidennen luokan oppilasta, jotka tekivät kartoituksen huhtikuussa 2013. Tutkimusmenetelmänä käytimme mixed methods –menetelmää, jossa yhdistyy määrällinen ja laadullinen tutkimus. Määräll…

Kumppanuus markkinointistrategiana ja liiketoiminnallisena mallina : case: Sanomalehtitalo Keskisuomalaisen kumppanuusstrategia

2002

Parental agency and related emotions in the educational partnership

2017

This study investigated the understudied issue of parental agency and related emotions in the educational partnership in the context of Finnish early childhood education and care. We asked (i) what types of parental agency can be identified in the educational partnership and (ii) in what ways emotions are related to these types of agency. The narrative method was used to analyse the interview data of parents of children with difficulties in self-regulation. The findings indicate that parental agency in the educational partnership varied from proactive and confrontational to hindered. Typically, pleasant emotions were related to proactive and unpleasant emotions to confrontational parental a…

“Some Women Are Born Fighters”: Discursive Constructions of a Fighter’s Identity by Female Finnish Judo Athletes

2017

Martial arts and combat sports have been traditionally associated with masculinity, and a range of contradictory meanings have been attached to women’s engagement and experiences. The present study draws on cultural praxis and feminist poststructuralist frameworks to explore how female martial artists are subjectified to dominant cultural discourses surrounding fighting and competition. Interviews with nine female judoka (judo athletes) were gathered in Finland and analyzed using Foucauldian Discourse Analysis (FDA). The FDA revealed that in female judoka talk, judo was constructed as a sport for all, but also as a male domain and a manly sport with fighting and competition as innate mascul…