Nonprobability online panels are commonly used in the social sciences as a fast and inexpensive way of collecting data contrast to more expensive probability-based panels. Given their ubiquitous use science research, great deal research is being undertaken assess properties nonprobability relative probability ones. Much this focuses on selection bias, however, there considerably less assessing comparability (or equivalence) measurements collected from respondents This article contributes...

Considering the current environmental restrictions, particularly those imposed on fossil fuel exploitation, hydrogen stands out as a very promising alternative for power and transportation sectors. This paper investigates effects of employment in K9K automotive diesel engine. Experiments were conducted at speed 2000 min−1 with various engine load levels 40%, 55%, 70%, 85%; several quantities monitored to evaluate performance use terms brake-specific energetic consumption (BSEC), economy,...

This article examines factors associated with survey attrition/retention in an online panel weekly/monthly follow-ups during the COVID-19 pandemic. It also explores effectiveness of making contact dropout participants and sample re-engagement, as well motivations barriers to maintaining participation. Our data consisted over 1.2 million records from 70,000 collected between March 2020 April 2022. On average, 92.7% weekly 95.9% monthly participated again a later wave. The high retention...

Web surveys are increasingly popular but tend to have more breakoffs compared interviewer-administered surveys. Survey occur when respondents quit the survey partway through. It reduces sample size for analysis, lowers statistical power and may lead biased estimates. Few prior studies investigated how compensate after data collection. This study develops a simulation where breakoff rate cause of manipulated then compensated using five different methods. We find that nonresponse weighting...

Using multiple modes to collect data is becoming a standard practice in surveys. While this should lower costs and reduce nonresponse error, it may have detrimental effects on measurement quality. This of special concern panel surveys where key focus measuring change over time changing an effect measures. In paper, we use quasi-experimental design from the Health Retirement Study compare quality two scales between face-to-face, telephone, Web modes. Panel members were randomly assigned...

Leather processing for commercial purposes involves going through a set of complex and laborious operations, resulting in over 70% waste relative to the initial feedstock; quarter this is produced Europe. Worldwide there are about 36,000 companies active sector, generating turnover almost 48 billion euros. As any industrial recovery highly researched topic, with alternatives its use being constantly considered. One most interesting solutions problem consists using part power applications....

While the choice of matrix versus item-by-item questions has received considerable attention in literature, it is still unclear what situation one better than other. Building upon previous findings, this study expands line research by examining whether difference between two question types moderated number response options. Through a web survey experiment, compares and with 2, 3, 4, 5, 7, 9, 11 Additionally, we also investigate impact device used to complete on data quality. The results show...

Data donation is a novel approach to collecting digital trace data, where users are asked download their retrospective data from platform and share them with the researchers. Little known about willingness donate potential bias that may arise nonparticipation. We conducted study among over 900 German Facebook asking two packages. While around 80% of participants were willing only one-third successfully did so. Trust in researchers positively correlates success, trust negatively associated...

The main objective of the paper is to reveal a few aspects related combustion quality diesel engine fueled in diesel-gas mode with fuel and compressed natural gas. total amount heat released per cycle will be higher when dual-fuel due LHV because gaseous state CNG. For low medium loads increase 10 % for it reach levels 25 higher. release rate preformed mixture double its value thresholds up 3.5 times (interval -15; -5°CA); admitting CNG into cylinder help stoichiometric values thus improving...

Abstract Time and cost pressures, the availability of alternative sources data, societal changes are leading to a move from traditional face-to-face surveys web or mixed-mode data collection. While we know that there mode differences between (presence an interviewer not, type stimuli, etc.), it is not clear what extent these could threaten comparability collected in surveys. In this article, investigate measurement quality European Social Survey (ESS) Round 8 CROss-National Online (CRONOS)...

Abstract It is well known that police recorded crime data susceptible to substantial measurement error. However, despite its limitations, widely used in regression models exploring the causes and effects of crime, which can lead different types bias. Here, we introduce a new R package (‘rcme’: Recounting Crime with Measurement Error) be facilitate sensitivity assessments impact error analyses using rates across wide range settings. To demonstrate potential such analysis, explore robustness...

Hydrogen can be a viable alternative fuel for modern diesel engines, offering benefits on efficiency and performance improvement. The paper analyses the results of thermodynamic model developed by authors in order to study influence addition process like vaporization, mixture forming, combustion at level droplets. bi-zonal is applied dual-fueled engine K9K type designed Renault automotives. For operating regime 2000 rpm speed 55% load, partially substituted energetic percents 6.76%, 13.39%,...

Abstract Background This study investigates the extent to which GHQ-12 exhibits configural, metric and scalar invariance across six ethnic groups in Britain Northern Ireland, using UK Household Longitudinal Study ( N = 35 410). Methods A confirmatory factor analysis was carried out on a white British group order establish an adequate measurement model. Secondly, multi-group conducted assess invariance. sensitivity comparing summated latent means out. Finally, revised estimates of scale...

Mixed-mode designs are increasingly important in surveys, and large longitudinal studies progressively moving to or considering such a design. In this context, our knowledge regarding the impact of mixing modes on data quality indicators is sparse. This study tries ameliorate situation by taking advantage quasi-experimental design survey. Using models that estimate reliability for repeated measures, quasi-simplex models, 33 variables analyzed comparing single-mode CAPI sequential CATI-CAPI...

In the global content regarding impact on environmental of gases emissions resulted from fossil fuels combustion, aspect discussed 2015 Paris Climate Conference, contribute to necessity searching alternative energy durable and renewable resources. The purpose paper is use hydrogen fuelling at truck diesel engine in order improves efficiency pollutant performance, being injected into inlet manifold. Experimental results show better energetic pollution performance dual fuelled due improvement...

Abstract Mixing multiple modes of survey data collection has become standard practice in research. Mixed-mode surveys are faced with a slew design decisions regarding which types to administer and sequence them in. Such largely based on administrative objectives, such as minimizing costs maximizing response rates. However, just important these mixed-mode is their impact nonresponse bias, measurement error total understudied issues the literature. In this article, we report sequential...