Provider: - Institution: - Data provided by Europeana Collections- Voters may be unable to hold politicians to account if they lack basic information about their representatives' performance. Civil ...society groups and international donors therefore advocate using voter information campaigns to improve democratic accountability. Yet, are these campaigns effective? Limited replication, measurement heterogeneity, and publication biases may undermine the reliability of published research. We implemented a new approach to cumulative learning, coordinating the design of seven randomized controlled trials to be fielded in six countries by independent research teams. Uncommon for multisite trials in the social sciences, we jointly preregistered a meta-analysis of results in advance of seeing the data. We find no evidence overall that typical, nonpartisan voter information campaigns shape voter behavior, although exploratory and subgroup analyses suggest conditions under which informational campaigns could be more effective. Such null estimated effects are too seldom published, yet they can be critical for scientific progress and cumulative, policy-relevant learning.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
We present precision Penning-trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity of neutron number N=32. Using the TITAN system the mass of \(^{51}\)K was measured ...for the first time, and the precision of the \(^{51,52}\)Ca mass values were improved significantly. The new mass values show a dramatic increase of the binding energy compared to those reported in the atomic mass evaluation. In particular, \(^{52}\)Ca is more bound by 1.74 MeV, and the behavior with neutron number deviates substantially from the tabulated values. An increased binding was predicted recently based on calculations that include three-nucleon (3N) forces. We present a comparison to improved calculations, which agree remarkably with the evolution of masses with neutron number, making neutron-rich calcium isotopes an exciting region to probe 3N forces at neutron-rich extremes.
Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly-charged ions (HCI), using the TITAN facility at TRIUMF. Compared to singly-charged ions, this ...provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb-isotopes have been charge bred in an electron beam ion trap to q = 8 - 12+ prior to injection into the Penning trap. In combination with the Ramsey excitation scheme, this unique setup creating low energy, highly-charged ions at a radioactive beam facility opens the door to unrivalled precision with gains of 1-2 orders of magnitude. The method is particularly suited for short-lived nuclides such as the superallowed {\beta} emitter 74Rb (T1/2 = 65 ms). The determination of its atomic mass and an improved QEC-value are presented.
The neutron-rich mass region around $A\approx100$ presents challenges for
modeling the astrophysical $r$-process because of rapid shape transitions. We
report on mass measurements using the TITAN ...Penning trap at TRIUMF-ISAC to
attain more reliable theoretical predictions of $r$-process nucleosynthesis
paths in this region. A new approach using highly charged ($q=15+$) ions has
been applied which considerably saves measurement time and preserves accuracy.
New mass measurements of neutron-rich $^{94,97,98}$Rb and $^{94,97-99}$Sr have
uncertainties of less than 4 keV and show deviations of up to 11$\sigma$ to
previous measurements. An analysis using a parameterized $r$-process model is
performed and shows that mass uncertainties for the A=90 abundance region are
eliminated.
The aim of this project was to present a cost-efficient quality control routine to ensure thefunctionality of HS-Lenti RT Activity Kit, an ELISA-based kit produced by Cavidi AB, thatscreens for ...lentiviruses such as HIV. Two main methods for quality control are presented inthis report; acceptance sampling and Statistical Process Control (SPC). Acceptance samplingis a process where only parts of a batch are tested in order to determine whether or not thewhole batch should be accepted or rejected. SPC centers around monitoring an ongoingprocess by using statistical measures and charts which visualize variations in these measuresover time. Initially, using an acceptance sampling plan is recommended as the primaryapproach. SPC charts can then be set up using the data generated from the acceptancesampling, and be used in parallel with the acceptance sampling for some time until they canbe implemented to a wider extent. This report also presents different options forimmunoassay data processing. Bayesian methods of estimating analyte concentrations inunknown samples are highlighted as promising candidates in improving the performance andusability of the kit. The report also includes a customer requirements analysis, based on aconducted survey, that investigates the demands researchers within Uppsala University placeon products similar to HS-Lenti RT Activity Kit. The data which the analysis is based on wasobtained from an online questionnaire and three interviews. An ethical analysis regarding thequality control approach and survey is included as well.
The neutron-rich mass region around \(A\approx100\) presents challenges for modeling the astrophysical \(r\)-process because of rapid shape transitions. We report on mass measurements using the TITAN ...Penning trap at TRIUMF-ISAC to attain more reliable theoretical predictions of \(r\)-process nucleosynthesis paths in this region. A new approach using highly charged (\(q=15+\)) ions has been applied which considerably saves measurement time and preserves accuracy. New mass measurements of neutron-rich \(^{94,97,98}\)Rb and \(^{94,97-99}\)Sr have uncertainties of less than 4 keV and show deviations of up to 11\(\sigma\) to previous measurements. An analysis using a parameterized \(r\)-process model is performed and shows that mass uncertainties for the A=90 abundance region are eliminated.
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