Determining PCU values in signalized circular intersections for certain vehicle types

Passenger car unit is an important comparison factor that helps the traffic engineer to describe the impact of heterogeneous traffic flows on the traffic performance of the infrastructure elements, compared to homogenous passenger car flows. The purpose of this study is to determine the passenger car unit value of certain vehicle types (e.g. buses, trucks) in signalized circular intersections. The values defined by the Hungarian standards are based on the weight and type of the vehicles, so it is important to know how these parameters of the vehicles influence the traffic conditions at this unique type of road junction, to be able to conduct a correct capacity calculation. PTV Vissim microscopic simulation program was used to model different traffic volumes and compositions getting by the recommended passenger car unit values for the application, and a proposal for further studies in subject

Traffic performance of signalized circular intersections

Traffic control strategies of signalized circular intersections are analyzed in this article after a brief overview of traffic lights in roundabouts. A detailed description was made on the ‘direct’ mode of operation of the Hungarian regulation describing three types of control program. Finally a comparison of traffic performance is given based on the main geometric features and parameters of the signal programs with a description of the signal plan structure. The PTV Vissim environment was used to examine and evaluate the performance of each combination through the average delay per vehicle resulting proposals for the application as well as for further studies in subject

Diatomic molecule in a strong infrared laser field: level-shifts and bond-length change due to laser-dressed Morse potential

We present a general mathematical procedure to handle interactions described by a Morse potential in the presence of a strong harmonic excitation. We account for permanent and field-induced terms and their gradients in the dipole moment function, and we derive analytic formulae for the bond-length change and for the shifted energy eigenvalues of the vibrations, by using the Kramers-Henneberger frame. We apply these results to the important cases of $\mathrm{H}_{2}$ and $\mathrm{LiH}$, driven by a near- or mid-infrared laser in the $10^{13}$ $\mathrm{ W/cm^2}$ intensity range

PHYSIOLOGICAL MARKERS OF DUCKWEED (Lemna minor L.) FOR BIOINDICATION OF WATER POLLUTION WITH COPPER AND DIURON (3-(3,4-DICHLOROPHENYL)-1,1-DIMETHYLUREA)

Abstract. Lesser duckweed (Lemna minor L.) is a cosmopolitan aquatic test plant, its growth and metabolic parameters are useful markers of the influence exerted on living organisms by changes in water quality. We have investigated the influence of water-polluting copper and herbicides on net biomass production, photosynthetic pigment content and efficiency parameters of induced chlorophyll fluorescence of duckweed. Copper decreased biomass production of duckweed only at higher concentrations (100 µM), while diuron inhibited growth even at 10 µM. With respect to the light-harvesting complexes of chloroplasts, the molar ratios between the main types of photosynthetic pigments proved to be the most sensitive markers of the impact of the applied water-polluting agents. In case of water pollution with copper and diuron, the mostly sensitive parameters of induced chlorophyll fluorescence were the potential quantum yield efficiency and the vitality index of photosynthetic apparatus, these parameters being recommended for bioindication of water pollution

Large fetal weight alone in Robson-1 parturients doesn't translate into a risk of Caesarean delivery higher then that of a vaginal birth

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May Measurement Month 2017: an analysis of blood pressure screening in Hungary—Europe

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Barriers for progress in salt reduction in the general population. An international study

Salt reduction is important for reducing hypertension and the risk of cardiovascular events, nevertheless worldwide salt intakes are above recommendations. Consequently strategies to reduce intake are required, however these require an understanding of salt intake behaviours to be effective. As limited information is available on this, an international study was conducted to derive knowledge on salt intake and associated behaviours in the general population. An online cohort was recruited consisting of a representative sample from Germany, Austria, United States of America, Hungary, India, China, South Africa, and Brazil (n=6987; aged 18-65. years; age and gender stratified). Participants completed a comprehensive web-based questionnaire on salt intake and associated behaviours. While salt reduction was seen to be healthy and important, over one third of participants were not interested in salt reduction and the majority were unaware of recommendations. Salt intake was largely underestimated and people were unaware of the main dietary sources of salt. Participants saw themselves as mainly responsible for their salt intake, but also acknowledged the roles of others. Additionally, they wanted to learn more about why salt was bad for health and what the main sources in the diet were. As such, strategies to reduce salt intake must raise interest in engaging in salt reduction through improving understanding of intake levels and dietary sources of salt. Moreover, while some aspects of salt reduction can be globally implemented, local tailoring is required to match level of interest in salt reduction. These findings provide unique insights into issues surrounding salt reduction and should be used to develop effective salt reduction strategies and/or policies. © 2013 The Authors