Search results for "Power"
showing 10 items of 5099 documents
Oczyszczanie ścieków przemysłowych w mikrobiologicznym ogniwie paliwowym
2017
Wyzwaniem dla ludzkości staje się obecnie poszukiwanie nowych metod pozyskiwania energii ze źródeł odnawianych. Związane jest to z dążeniem ludzkości do równoważonego rozwoju opartego na stosowaniu neutralnych źródeł energii wobec stale pogłębiającego się efekty cieplarnianego. Duże zagęszczenie użytkowników energii przypadających na jednostkę powierzchni wymusza poszukiwanie takich rozwiązań, które wykorzystywałyby lokalne zasoby do jej wytwarzania, a w konsekwencji do sprostania tych potrzeb. Technologią, która doskonale wpisuje się w proponowany model to technologia mikrobiologicznych ogniw paliwowych. Technologia ta zapewnia produkcję energii przy jednoczesnym zagospodarowaniu odpadów. …
Wpływ usytuowania anody na funkcjonowanie mikrobiologicznego ogniwa paliwowego
2018
Mikrobiologiczne ogniwa paliwowe (MFCs - microbial fuel cells) spełniają podwójną funkcję. Oczyszczają ścieki przy jednoczesnym wytwarzaniu energii elektrycznej. Ta dwubiegunowość wyróżnia technologię MFC spośród stosowanych do tej pory w procesach oczyszczania ścieków innych technologii. Istotnym aspektem do rozwiązania jest optymalizacja działania MFC w celu uzyskania jak najwyższej skuteczności oczyszczania ścieków oraz zwiększenia ilości uzyskiwanej energii elektrycznej. Jednym z rozwiązań jest odpowiednie umieszczenie anody. Praca przedstawia badania dotyczące wpływu usytuowania anody na skuteczność oczyszczania ścieków. Wykazano, że zmiana położenia anody wpływa głównie na czas redukc…
A probabilistic long‐term framework for site‐specific erosion analysis of wind turbine blades: A case study of 31 Dutch sites
2021
Abstract Rain‐induced leading‐edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas it may take several years for others. In addition, the growth of erosion may also differ for different blades and turbines operating at the same site. Hence, LEE is a site‐ and turbine‐specific problem. In this paper, we propose a probabilistic long‐term framework for assessing site‐specific lifetime of a WTB coating system. Case studies are presented for 1.5 and 10 MW wind turbines, where geographic bubble charts for the leading‐edge lifetime and number of repai…
Student Engagement and School Burnout in Finnish Lower-Secondary Schools: Latent Profile Analysis
2016
Self-ratings of behavioural engagement, cognitive engagement and school burnout were used in person-centred analyses to identify latent profiles among 2,485 Finnish lower-secondary school students. Three profiles were identified: high-engagement/low-burnout (40.6% of the sample), average-engagement/average-burnout (53.9%), and low-engagement/high-burnout (5.5%). Another sample of lower-secondary school students was used to validate the 3 profiles. The factors most strongly associated with the high-engagement/low-burnout profile of lower-secondary school students’ were high levels of support from teachers and family, good academic performance, and lack of truancy. The study indicated that te…
Vapauttava laulupedagogiikka : kriittinen toimintatutkimus oppilaslähtöistä laulunopetusmallia luomassa
2011
Vapauttava laulupedagogiikka on pro gradu -opinnäytetyö, jonka tavoitteena on määritellä laulupedagogista mallia yhdistelemällä oppilaslähtöisiä suuntauksia, kuten psykofyysistä musiikkipedagogiikkaa, Paulo Freiren kriittistä vapautuksen pedagogiikkaa, Eira Korpisen kokonaisvaltaista koulukasvatusmallia, sekä tutkivan opettajan ja oppilaan kokemuksia. Tutkimus on luonteeltaan narratiivinen. Johtopäätöksiä ja tutkimustuloksia ei pidä tulkita yleiseksi totuudeksi, vaan tutkijan subjektiiviseksi näkemykseksi. Lauluopettajien koulutuksessa ei anneta kovin paljon tietoa psykologisten seikkojen vaikutuksesta laulutekniikkaan ja opettamiseen. Tutkielma pyrkii tuottamaan tietoa näistä ilmiöistä esi…
(Dis)empowering assessment? : assessment as experienced by students in their upper secondary school EFL studies
2017
Assessment has a great deal of power over students. However, there is little research on how students experience assessment and its power in the school context. The purpose of this mixed-methods study is therefore to examine how students in one Finnish upper secondary school experienced assessment and (dis)empowerment in their EFL studies. The present study, which situates itself within the realm of teacher research, also aims to experiment with alternative assessment methods in order to investigate whether they could foster empowerment in upper secondary EFL studies. The study comprises five articles and a monograph, and is divided into two parts, each with its own research aims. Part 1 an…
Critical issues and future prospects of the secondary substation in smart grid context
2014
This paper is focused on the new role of the secondary substation in the smart grids context. This innovative view has been proposed and developed in the framework of two Research Projects: NewCabELARC Project and Reipersei Project. The latter provides a concrete and comprehensive low cost solutions for the smart grid monitoring and control, allowing the real diffusion and integration of Distributed Generation and the full exploitation of Renewable Energy Sources. In this field, this paper shows how the secondary substation (SS) takes the role of smart transducer node where innovative devices can be located, collecting the measurement data coming from the field devices (power and energy met…
Specificity of weightlifting bench exercises in kayaking sprint performance: A perspective for neuromuscular training
2022
Several studies showed significant differences between bench lift exercises without investigating which is more related, in biomechanical and neuromuscular terms, to improve the sprint flatwater kayak performance. This study aims to compare the power-load and velocity-load neuromuscular parameters performed in prone bench pull (PBP), and bench press (BP) exercises to identify which of them meet the gesture specificity in sprint flatwater kayak performance. Ten elite kayakers participated in this study. Power-load, velocity-load relationships, the maximum dynamic strength, and the kayak sprint performance test were assessed. The power-load and velocity-load relationships showed significant d…
“LATVIA WILL ALWAYS BE MY HOME”: LATVIAN EMIGRANTS IN SWEDEN AFTER 1991 IN THE LATVIAN NATIONAL ORAL HISTORY COLLECTION
2020
Latvians are one of the most mobile European nations. Latvian migration to Sweden has a long history. After the II World War, more than 4,000 people moved from Latvia to Sweden, fleeing Soviet power. The second wave of immigration to Sweden began with the restoration of Latvian independence in 1991 and continues to this day. Both of these waves of migration are documented in the Latvian National Oral History collection. This article analyzes life-story interviews with expatriates in Sweden after the restoration of independence and explores how the migrants themselves describe their experiences in their new home country, their reflections on Latvians, Latvianness, and the preservation of nat…