565 research outputs found
Non-Destructive Identification of Cold and Extremely Localized Single Molecular Ions
A simple and non-destructive method for identification of a single molecular
ion sympathetically cooled by a single laser cooled atomic ion in a linear Paul
trap is demonstrated. The technique is based on a precise determination of the
molecular ion mass through a measurement of the eigenfrequency of a common
motional mode of the two ions. The demonstrated mass resolution is sufficiently
high that a particular molecular ion species can be distinguished from other
equally charged atomic or molecular ions having the same total number of
nucleons
Forbedring af unges evne til at forudsige potentielle farer i trafikken vha. kørselssimulatortræning
Unge bilister forbliver overrepræsenterede i trafikulykkesstatistikker. Bilisters evne til at identificere potentielle risikosituationer samt til at reagere adækvat i disse situationer forbedres gradvist baseret på erfaring med håndtering af en bred vifte af trafikale situationer. Internationalt betegnes denne evne ofte som hazard perception skills (HPS). Formålet med denne undersøgelse er at afdække, om yngre bilisters HPS i fodgængerrelaterede situationer kan forbedres gennem et specialdesignet træningsforløb, gennemført i en kørselssimulator. Træningsforløbet omfattede en kombination af træningskørsel i en kørselssimulator, en video med et lydspor med ekspertkommentarer vedr. bilkørsel samt en afspilning af deltagernes egen træningskørsel. 30 unge bilister modtog træning og deres resultater blev sammenlignet med 30 utrænede bilister. Sammenligningen blev baseret på deres visuelle fikseringer og køreadfærd i forskellige fodgængerrelaterede situationer af varierende kompleksitet. Resultaterne viste, at trænede bilister reagerede på en af tre skjulte farer ved at reducere hastigheden, mens utrænede bilister ikke gjorde. Analysen af deltageres visuelle fikseringer viste, at de trænede bilister oftere fikserede på steder, hvor farer kunne være skjult. Derudover havde trænede bilister en lavere selvvurderet HPS efter træningen end før træningen. Interventionen havde en positiv effekt med hensyn til at forbedre bilisternes kørehastighed og visuelle fikseringer i potentielt kritiske fodgængerrelaterede situationer, hvilket kræver mere avancerede HPS. Resultaterne tyder på, at interventionen med fordel kan videreudvikles med henblik på at implementere et ekstra modul, som led i den køreskolebaserede køreundervisning, for at sikre nye bilister de bedst mulige HPS, når de får kørekørt
Analysis of time-to-event for observational studies: Guidance to the use of intensity models
This paper provides guidance for researchers with some mathematical
background on the conduct of time-to-event analysis in observational studies
based on intensity (hazard) models. Discussions of basic concepts like time
axis, event definition and censoring are given. Hazard models are introduced,
with special emphasis on the Cox proportional hazards regression model. We
provide check lists that may be useful both when fitting the model and
assessing its goodness of fit and when interpreting the results. Special
attention is paid to how to avoid problems with immortal time bias by
introducing time-dependent covariates. We discuss prediction based on hazard
models and difficulties when attempting to draw proper causal conclusions from
such models. Finally, we present a series of examples where the methods and
check lists are exemplified. Computational details and implementation using the
freely available R software are documented in Supplementary Material. The paper
was prepared as part of the STRATOS initiative.Comment: 28 pages, 12 figures. For associated Supplementary material, see
http://publicifsv.sund.ku.dk/~pka/STRATOSTG8
Hungarian International Development Cooperation: Context, Stakeholders and Performance
This paper explores the domestic and international context of Hungary's emerging international development policy. Specifically, it looks at three factors that may influence how this policy operates: membership in the European Union (EU) and potential ‘Europeanization’, Hungary's wider foreign policy strategy, and the influence of domestic stakeholders. In order to uncover how these factors affect the country's international development policy, semi-structured interviews were carried out with the main stakeholders. The main conclusions are: (1) While accession to the EU did play a crucial role in restarting Hungary's international development policy, the integration has had little effect since then; (2) international development policy seems to serve mainly Hungary's regional strategic foreign policy and economic interests, and not its global development goals; and (3) although all the domestic development stakeholders are rather weak, the Ministry of Foreign Affairs (MFA) still seems to play a dominating role. Convergence with European requirements and best practices is, therefore, clearly hindered by foreign policy interests and also by the weakness of non- governmental stakeholders
Preliminary results from the project ”Slow On the Bottle – Enjoy the Road (SOBER)”: Instruments to measure implicit associations towards drunk-driving and to change implicit drunk-driving associations
Attitude-based interventions are often a key element in attempts to change behavior, but do not always have the expected effect. A reason for the lack of success may be that people have two types of attitudes, explicit (introspectively accessible, what people say they mean) and implicit attitudes (not accessible to conscious introspection, cannot be measured by questionnaires, but by other experiments methods). Implicit attitudes are assessed by measuring participants implicit associations between a target category (here drunk-driving and sober-driving) and valence categories (here good and bad words). International research shows that a person’s implicit associations’ sensitivity can be changed by relatively simple behavioral methods. This study aims to adjust existing methods of implicit associations’ measurement and of implicit associations change, to measure and change implicit associations towards drunk-driving. As a first step, implicit associations towards drunk-driving and sober-driving were measured with the Go/No-Go Associations Task (GNAT), and the implicit associations change was performed with behavioral training method, the Avoid/Approach Task (AAT). The preliminary results show that the GNAT successfully measures implicit associations towards drunk-driving and sober-driving. Also, the preliminary results show that the implicit associations towards drunk-driving and sober-driving were changed with the AAT. The results are promising as it looks like both instruments are applicable. The study has both national and international value, as the first study that measures implicit attitudes towards drunk-driving and also the first to try to change drunk-driving implicit attitudes. Pending a complete sample and further analysis, the results will reveal drunk-driving attitudes and if these attitudes can be changed in a socially beneficial ways
The Fear of Pain Questionnaire-III and the Fear of Pain Questionnaire-Short Form: a confirmatory factor analysis
Source at https://doi.org/10.2147/JPR.S133032 Background: The Fear of Pain Questionnaire-III (FPQ-III) is a widely used instrument to
assess the fear of pain (FOP) in clinical and nonclinical samples. The FPQ-III has 30 items and
is divided into three subscales: Severe Pain, Minor Pain and Medical Pain. Due to findings of
poor fit of the original three-factor FPQ-III model, the Fear of Pain Questionnaire-Short Form
(FPQ-SF) four-factor model has been suggested as an alternative. The FPQ-SF is a revised
version of the FPQ-III, reduced to 20 items and subdivided into four subscales: Severe Pain,
Minor Pain, Injection Pain and Dental Pain.
Aims and methods:
The purpose of the study was to investigate the model fit, reliability and
validity of the FPQ-III and the FPQ-SF in a Norwegian nonclinical sample, using confirmatory
factor analysis (CFA). The second aim was to explore the model fit of the two scales in male
and female subgroups separately, since previous studies have uncovered differences in how well
the questionnaires measure FOP across sex; thus, the questionnaires might not be sex neutral. It
has been argued that the FPQ-SF model is better because of the higher fit to the data across sex.
To explore model fit across sex within the questionnaires, the model fit, validity and reliability
were compared across sex using CFA.
Results:
The results revealed that both models’ original factor structures had poor fit. However,
the FPQ-SF had a better fit overall, compared to the FPQ-III. The model fit of the two models
differed across sex, with better fit for males on the FPQ-III and for females on the FPQ-SF.
Conclusion:
The FPQ-SF is a better questionnaire than the FPQ-III for measurement of FOP
in Norwegian samples and across sex subgroups. However, the FPQ-III is a better questionnaire
for males than for females, whereas the FPQ-SF is a better questionnaire for females than for
males. The findings are discussed and directions for future investigations outlined.<p
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