An Omnidirectional System for Navigation in Virtual Environments

Part 8: Robotics and ManufacturingInternational audienceVirtual Reality (VR) is one of the newest technological domains with revolutionary applicability for the tomorrow’s Future Internet, including visions of the Internet of Things. The sensation of total immersion in Virtual Environment (VE) is still unresolved. Therefore, our work proposes a new omnidirectional locomotion interface for navigation in VEs. The novel interface was built from an ordinary unidirectional treadmill, a new mechanical device, a motion capturing system to track the human walking and a control method using artificial intelligence techniques. A neural network is used to predict the motion of the new interface based on user’s body motion and information about VE. The feasibility of the proposed system is verified through experiments and the preliminary results suggest that the new interface performs very well in a simplest VE based on our control method

Noi strategii de prevenire şi combatere a bolilor şi dăunătorilor la specia cireş

The research was carried out within the SCDP Iasi, in order to test ecological alternatives regarding the control of diseases and pests in the cherry species. The observations were made in 2019 having as research material 2 varieties of cherry (CĂTĂLINA, MARIA), grafted on mahaleb, the planting distance of 5X4 being in year VII from planting, the experience was placed on 4 experimental variants.The climatic conditions of this period were particularly favorable both for the evolution of the attack of the diseases (anthracnose and monilosis) and for pests. In the fight against diseases (moniliasis and anthracnose) the best results were obtained in the case of the chemical variant with Signum products 0.03%, Folicur Solo 0.075%, Mospilan 20 SG 0.03% and in the ecological variantthe best results were obtainedwith the products Deffort 0.3%, Copfort 0.3%, Mimox 0.2%, Laser 240 SC 0.06%

Understanding the Ecosystem Carrying Capacity for <i>Romanichthys valsanicola</i>, a Critically Endangered Freshwater Fish Endemic to Romania, with Considerations upon Trophic Offer and Behavioral Density

The most recent assessment (2008) of the IUCN Red List of Threatened Species classified Romanichthys valsanicola as critically endangered (CR). In December 2022, an expert team from the National Institute for Research and Development in Environmental Protection Bucharest investigated the presence of the species in historical locations and in other potential sites. The authors correlated public data to the actual habitat area to calculate the potential species density in relation to the specific territorial behavior. The ecological carrying capacity was represented by the consensus between the behavioral density limitations and the trophic limitations of the actual species potential habitat. Both trophic availability and populational density present encouragingly high values for the sculpin perch in the Valsan River, indicating that the natural habitat could host a considerably higher number of individuals

Researches on the accumulation and transfer of heavy metals in the soil in tomatoes -

Heavy metals in contaminated soils have benefited from a considerable attention due to the possible risks for the human body. The current study has investigated the accumulation and transfer coefficient for three heavy metals (Cu, Pb, Zn) found in the contaminated soil with three concentrations (c1=1.5%, c2=3.0%, c3=4.5%, c4=6.0%), obtained by mixing the three metals, in the tomato fruit. The highest accumulation in the tomato fruits was recorded for zinc, then copper and the smallest for lead, for all four concentrations used. The transfer coefficient decreases as the concentration of heavy metals increases, so that for high heavy metals concentrations, the values of the transfer coefficient are very low, and for small heavy metals concentrations in the soil, the values for the transfer coefficient are higher. The assessment of accumulation and transfer of heavy metals in the fruits of tomatoes grown in the contaminated soil has concluded that all concentrations of the copper, lead and zinc mix have shown a low risk for human consumption

Evaluating Recovery Control Concentrations of Bovine Coronavirus (EVAg 015V-02282) Used for SARS-CoV-2 Wastewater Surveillance

SARS-CoV-2 is a pathogenic strain of coronavirus which causes acute respiratory disease in humans. Community spread of COVID-19 was difficult to assess in the beginning of the pandemic, so new methods of detecting the virus had to be discovered. For this reason, national wastewater surveillance systems were implemented in order to detect the spread of SARS-CoV-2 virus. However, to establish such systems, there’s a need to standardize protocols for coronavirus concentration, as well as finding the optimal titre of BCoV, generally used as a recovery control. In our study, we used a strain of Betacoronavirus 1 (EVAg 015V-02282) provided by EVAg as our process control. In order to set up which concentration of the Bovine coronavirus (BCoV) will give the most conclusive results, we diluted the virus three times by the decimal method before running the samples in the QIAcuity Digital PCR (dPCR). The evaluation was made so that the BCoV concentration could be used for future studies