Search results for "TIME"

Early science learning with a virtual tutor through multimedia explanations and feedback on spoken questions

2018

The purpose of this pilot study with a within-subject design was to gain a deeper understanding about the promise and restrictions of a virtual tutoring system designed to teach science to first grade students in Finland. Participants were 61 students who received six tutoring science sessions of approximately 20 min each. Sessions consisted of a sequence of narrated multimedia science presentations during which a virtual tutor explained science phenomena displayed in pictures. Narrated science explanations were followed by one or more multiple choice questions with immediate feedback about students’ choices and a possible second attempt, during which students reached 97% accuracy. A pretes…

(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…

Arviointiselvitys 2018 : liikuntatieteellisen tiedekunnan opiskelijoiden mielipiteitä opintojen arvioinnista, palautteenannosta ja vilpistä

2019

Arviointi on osa oppimisprosessia ja sen on havaittu ohjaavan opiskelua ja oppimista merkittävästi. Arvioinnin osana myös arviointiin kuuluva palautteenanto on merkityksellistä. Oppimisen kannalta pidetään tärkeänä sanallista ja opastavaa palautetta, joka kiinnittää opiskelijan huomiota opiskeltavan asian olennaisiin asioihin sekä antaa kehitysehdotuksia ja auttaa opiskelijaa ymmärtämään omien tietojen puutteita. Tässä selvityksessä Liikuntatieteellisen tiedekunnan opiskelijoilta kysyttiin mielipiteitä ja kokemuksia arviointimenetelmistä ja arviointiin liittyvästä palautteenannosta. Myös vilppi ja arvioinnin tasa-arvoisuus olivat kyselyn teemoina. Yleisimmin arviointimenetelminä käytettiin …

Opettajien arviointimenetelmät ja arviointiosaaminen akateemisten taitojen arvioinnissa alakoulussa

2022

KM Riitta Virinkosken erityispedagogiikan väitöskirja “Teachers’ Practices and Competence to Assess Students’ Academic Skills in Primary School” tarkastettiin Jyväskylän yliopistossa 11.3.2022. Vastaväittäjänä toimi professori Marita Mäkinen Tampereen yliopistosta, ja kustoksena oli professori Mikko Aro Jyväskylän yliopistosta. nonPeerReviewed

Designing and Implementing a CSCL-based Course on the Data Security of a Wireless Learning Environment

2012

This article reports on a design-based research (DBR) process for designing and implementing a computer-supported collaborative learning (CSCL) course on the data security of wireless learning environments. The study focuses on examining how university students practice data security when learning on a wireless campus, how data security aspects appear in this study and how students perceive the role of data security in CSCL. The research subjects included six pilot students and eight students enrolled in the course. To promote the reliability of the findings, various kinds of data were used. The data was analysed following the grounded theory approach. The results suggest that data security…

Vertaisarviointitaitoja oppimassa verkossa

2018

Alignment of linear molecules by short duration laser pulses

2005

Alignment of linear molecules is efficiently induced by strong linearly polarized laser pulses. In the case of short pulses with respect to molecular rotation, periodic alignment appears in field-free conditions after the extinction of the field. This manuscript presents three techniques where the value of allows to quantify alignment without molecular dissociation nor additional alignment. They use a weak time-delayed probe pulse which experiences the optical properties of an aligned sample and shows modification of its characteristics. The first of them measures a depolarization due to the birefringence of the sample. The second one is based on the defocusing produced by the spatial distr…

Radioluminescence Response of Ce-, Cu-, and Gd-Doped Silica Glasses for Dosimetry of Pulsed Electron Beams

2021

Radiation-induced emission of doped sol-gel silica glass samples was investigated under a pulsed 20-MeV electron beam. The studied samples were drawn rods doped with cerium, copper, or gadolinium ions, which were connected to multimode pure-silica core fibers to transport the induced luminescence from the irradiation area to a signal readout system. The luminescence pulses in the samples induced by the electron bunches were studied as a function of deposited dose per electron bunch. All the investigated samples were found to have a linear response in terms of luminescence as a function of electron bunch sizes between 10−5 Gy/bunch and 1.5×10−2 Gy/bunch. The presented results show that these…

Photoluminescence time decay of surface oxygen deficient centers in un‐doped and Ge‐doped silica

2005

We report a study of the emission decay from the singlet excited state of two fold coordinated Si and Ge centers stabilized on the surface of silica and Ge-doped silica. The PL lifetimes are of the order of nanoseconds and increase on decreasing the temperature. The results suggest that, for the surface centers, the phonon assisted intersystem-crossing process linking the excited states affects the decay rates, is effective down to low temperatures and is distributed because of the inhomogeneity of the defects. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Stability, electronic structure, and optical properties of protected gold-doped silver Ag29−xAux (x = 0–5) nanoclusters

2017

In this work, we used density functional theory (DFT) and linear response time-dependent DFT (LR-TDDFT) to investigate the stability, electronic structure, and optical properties of Au-doped [Ag29-xAux(BDT)12(TPP)4]3- nanoclusters (BDT: 1,3-benzenedithiol; TPP triphenylphosphine) with x = 0-5. The aim of this work is to shed light on the most favorable doped structures by comparing our results with previously published experimental data. The calculated relative energies, ranging between 0.8 and 10 meV per atom, indicate that several doped Ag29-xAux nanoclusters are likely to co-exist at room temperature. However, only the Au-doped [Ag29-xAux(BDT)12(TPP)4]3- nanoclusters that have direct bon…