νd→μ−Δ++n\nu d \to \mu^- \Delta^{++} n Reaction and Axial Vector N−ΔN-\Delta Coupling

The reaction $\nu d \to \mu^- \Delta^{++} n$ is studied in the region of low $q^2$ to investigate the effect of deuteron structure and width of the $\Delta$ resonance on the differential cross section. The results are used to extract the axial vector $N-\Delta$ coupling $C^{A}_5$ from the experimental data on this reaction. The possibility to determine this coupling from electroweak interaction experiments with high intensity electron accelerators is discussed.Comment: 14 pages, REVTEX, 5 figure

Microscopic theories of neutrino-^{12}C reactions

In view of the recent experiments on neutrino oscillations performed by the LSND and KARMEN collaborations as well as of future experiments, we present new theoretical results of the flux averaged $^{12}C(\nu_e,e^-)^{12}N$ and $^{12}C(\nu_{\mu},{\mu}^-)^{12}N$ cross sections. The approaches used are charge-exchange RPA, charge-exchange RPA among quasi-particles (QRPA) and the Shell Model. With a large-scale shell model calculation the exclusive cross sections are in nice agreement with the experimental values for both reactions. The inclusive cross section for $\nu_{\mu}$ coming from the decay-in-flight of $\pi^+$ is $15.2 \times 10^{-40} cm^2$ to be compared to the experimental value of $12.4 \pm 0.3 \pm 1.8 \times 10^{-40} cm^2$, while the one due to $\nu_{e}$ coming from the decay-at-rest of $\mu^+$ is $16.4 \times 10^{-42} cm^2$ which agrees within experimental error bars with the measured values. The shell model prediction for the decay-in-flight neutrino cross section is reduced compared to the RPA one. This is mainly due to the different kind of correlations taken into account in the calculation of the spin modes and partially due to the shell-model configuration basis which is not large enough, as we show using arguments based on sum-rules.Comment: 17 pages, latex, 5 figure

The methodological quality is insufficient in clinical practice guidelines in the context of COVID-19 : systematic review

Objectives The number of published clinical practice guidelines related to COVID-19 has rapidly increased. This study explored if basic methodological standards of guideline development have been met in the published clinical practice guidelines related to COVID-19. Study Design and Setting Rapid systematic review from February 1 until April 27, 2020 using MEDLINE [PubMed], CINAHL [Ebsco], Trip and manual search, including all types of healthcare workers providing any kind of healthcare to any patient population in any setting. Results There were 1342 titles screened and 188 guidelines included. The highest average AGREE II domain score was 89% for scope and purpose, the lowest for rigor of development (25%). Only eight guidelines (4%) were based on a systematic literature search and a structured consensus process by representative experts (classified as the highest methodological quality). The majority (156; 83%) was solely built on an informal expert consensus. A process for regular updates was described in 27 guidelines (14%). Patients were included in the development of only one guideline. Conclusion Despite clear scope, most publications fell short of basic methodological standards of guideline development. Clinicians should use guidelines that include up-to-date information, were informed by stakeholder involvement, and employed rigorous methodologies

Efficacy of Traffic Signal Indicators

Surveys were conducted to determine if there is a problem with motorists determining the direction indicated by traffic light signal arrows. Canadian optometrists were asked if their patients report this problem during a visual examination. Drivers were queried about difficulty with the arrows and under what circumstances the difficulties occurred. Traffic engi­neers were requested to comment on the use of traffic light arrows in their jurisdictions and whether or not they perceive a problem with visibility. The results indicate that many Canadians, and Manitobans in particular, reported difficulty with the arrows

Efficacy of Traffic Signal Indicators

Surveys were conducted to determine if there is a problem with motorists determining the direction indicated by traffic light signal arrows. Canadian optometrists were asked if their patients report this problem during a visual examination. Drivers were queried about difficulty with the arrows and under what circumstances the difficulties occurred. Traffic engi­neers were requested to comment on the use of traffic light arrows in their jurisdictions and whether or not they perceive a problem with visibility. The results indicate that many Canadians, and Manitobans in particular, reported difficulty with the arrows

Kooperacijos raida ir perspektyvos Lietuvos žemės ūkyje

Santr. anglBibliogr.: p. 69 (14 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij