Search results for "Neet"
showing 10 items of 1432 documents
The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma opt…
2009
A method of ultrasound-assisted digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES) used for the determination of trace element (chromium, copper, lead, nickel, vanadium and zinc) concentrations in fly ash samples was developed. All the measurements were performed in robust plasma conditions. Ultrasound-assisted digestion procedures using digestion solutions of aqua regia and hydrofluoric acid (HF) resulted in recovery rates of over 80% for all the analyte elements. Ultrasound-assisted two-step digestion with digestion solutions of 6 mL of HNO₃(Step 1) and 3 mL of HNO₃+ 3 mL of HF (Step 2) resulted in recovery rates of over 92% for all the analyte elemen…
An ultrasound-assisted digestion method for the determination of toxic element concentrations in ash samples by inductively coupled plasma optical em…
2007
method of ultrasound-assisted digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES) used for the determination of toxic element concentrations (arsenic, barium, cobalt, copper, lead, nickel, strontium, vanadium and zinc) in ash samples was developed. All the measurements were performed in robust plasma conditions which were tested by measuring the Mg(II) 280.270 nm/Mg(I) 285.213 nm line intensity ratios. The highest line intensity ratios were observed when a nebulizer gas flow of 0.6 L minˉ¹, auxiliary gas flow of 0.2 L minˉ¹ and plasma power of 1400 W were used for radially viewed plasma. The analysis of SRM 1633b showed that the ultrasound-assisted metho…
Analytical models for the pulse shape of a superconductor-ferromagnet tunnel junction thermoelectric microcalorimeter
2022
AbstractThe superconductor-ferromagnet thermoelectric detector (SFTED) is a novel ultrasensitive radiation detector based on the giant thermoelectric effect in superconductor-ferromagnet tunnel junctions. We demonstrate analytical models and solutions in the time domain for a SFTED operated as a microcalorimeter (pulse excitation), in the linear small-signal limit. Based on these solutions, the signal current and temperature pulse response were studied for two different electrical circuit models, providing design conditions for stable and non-oscillatory response.Kindly check and confirm whether the corresponding author is correctly identified.The corresponding author is correct.
Does Physical Activity Application Use Promote Self-Efficacy for Exercise? A Study Among Aged People
2022
The importance of sustained physical activity in healthy aging is well established. To achieve sustained physical activity and exercise, related self-efficacy is important. Hence, solutions to promote self-efficacy for exercise among aged people are urgently needed. Digital wellness technologies provide a potential solution, but research on their potential to promote self-efficacy for exercise is scarce and more research is needed. To address this need, this study investigates how effective is the use of a physical activity application in promoting self-efficacy for exercise among aged people. Self-efficacy levels were compared between three different time points: before taking the applicat…
Oppiainekohtaiset mieltymykset ja minäpystyvyysuskomukset luku- ja laskutaidon sujuvuuden kehityksen selittäjinä 1.-2. luokilla
2018
Tämän tutkimuksen tarkoitus oli tutkia oppiainekohtaisten mieltymysten ja minäpystyvyysuskomusten yhteyttä luku- ja laskutaidon sujuvuuteen ensim-mäisellä luokalla. Tämän lisäksi oltiin kiinnostuneita siitä, selittävätkö ensim-mäisen luokan mieltymykset ja minäpystyvyys luku- ja laskusujuvuuden kehi-tystä ensimmäiseltä luokalta toiselle, kun ensimmäisen luokan taidot oli vakioitu. Tutkimuksessa käytettiin Lasten luku- ja laskusujuvuus- hankkeen aineistoa tarkastelemaan 200 keskisuomalaisen oppilaan luku- ja laskutaidon sujuvuuden kehitystä ensimmäisen luokan keväästä aina toisen luokan kevääseen asti. Aineisto analysoitiin lineaarisella regressioanalyysillä sekä hierarkkisella lineaarisella…
The factors affecting the use of contactless payments
2016
Mobile technology has become a significant part of our everyday life. The technology develops rapidly and in the past few years numerous of companies have made payments possible trough mobile equipments. The most used technology for conducting such a payments is called near field communication (NFC), which enables fast and convenient payments using countless of different instruments for paying. The objective of this research is to shed light on the use of contactless payments via NFC. To achieve the objective we explored the factors that might have influence on intention to use and use of contactless payments. Thus, the research questions are: Is there significant relationship between the c…
Actual and Potential Pedagogical Use of Tablets in Schools
2013
This study reviews the potential of tablet technology for teaching and learning. In autumn 2012, we conducted a focused survey comprising quantitative and qualitative questions with Finnish teachers (N = 171, from 54 schools). We focused on perceived pedagogical opportunities and the actualized pedagogical potential of tablets at schools. The survey results indicate that the actual usefulness of tablets in schools was significantly less than what teachers perceived as the pedagogical potential. However, the results demonstrate the positive impact these devices are having on teaching and learning, as well as prompting changes in pedagogical perspectives. Teachers stated that tablets can dive…
Mobile phone use before and during the COVID-19 pandemic : a panel study of older adults in seven countries
2023
The aim of this study was to investigate the changes in older adults’ mobile phone use from before to during the COVID-19 pandemic. The media displacement and digital divide approaches served as the theoretical frameworks of the study. The data were drawn from the 2018 and 2020 waves of the Aging + Communication + Technology cross-national longitudinal panel study. The sample consisted of older Internet users, aged 62 to 96 (in 2018), from Austria, Canada, Finland, Israel, the Netherlands, Romania, and Spain, who participated in both waves (N = 4,398). Latent class analysis and latent transition analysis with multinomial regression models were the main methods applied to the data. With rega…
Stages of Exercise Behavior Change in a Digital Wellness Program for Aged People : Relationship With Self-Efficacy for Exercise
2022
Sustained physical activity and exercise are central to healthy ageing. Yet, the majority of aged people are insufficiently physically active. Digital wellness technologies are potential in promoting exercise behaviors among aged people, but more detailed research on their potential to promote behavior change is limited. To address this gap, the purpose is to investigate how partaking in a digital wellness program influences the stage of exercise behavior change among aged people and to test whether self-efficacy for exercise can differentiate the program participants in terms of the stages of change. The investigation builds on the stages of exercise behavior change derived from the transt…
Consistency of Independent Component Analysis for FMRI
2021
Background Independent component analysis (ICA) has been widely used for blind source separation in the field of medical imaging. However, despite of previous substantial efforts, the stability of ICA components remains a critical issue which has not been adequately addressed, despite numerous previous efforts. Most critical is the inconsistency of some of the extracted components when ICA is run with different model orders (MOs). New Method In this study, a novel method of determining the consistency of component analysis (CoCA) is proposed to evaluate the consistency of extracted components with different model orders. In the method, “consistent components” (CCs) are defined as those whic…