The aim of the study was to analyse relationship between PM2.5 and PM10 concentrations, traffic density meteorological factors during week with regular regime first COVID-19 lockdown in Novi Sad, Serbia. During period, which included working days weekends, emission contributions PMs were also determined. Obtained results have shown higher PM, pressure contribution values, lower temperature, rel...

A general-arrival, bulk service time queueing model is formulated for studying the distribution of random queues in signalized networks. The model is predicated on the occurrence of three traffic stream transformations: merging, splitting, and filtering. The model is applied to steady-state conditions (traffic intensity < 1.0) but can be eventually converted to a time-dependent form to account ...

Many time-critical applications forMobile AdhocNETworks (MANETs), such as themilitary applications and disaster response, call for proactive link and route maintenance to ensure low latency for reliable data delivery. The goal of this paper is to minimize the energy overhead due to the high control traffic caused by the periodic route and link maintenance operations in the proactive routing pro...

Airspace capacity estimates are important for managing air traffic and predicting the effectiveness of new airspace designs and proposed decision support tools. Because air traffic management relies on manual procedures, controller workload determines the traffic limit of most sectors. Current operational procedures for estimating capacity in United States airspace do not account for conflict a...

Many large neighbourhoods are located near heavy-traffic roads; therefore, it is necessary to control the levels of air pollution near road exposure. The primary air pollutants emitted by motor vehicles are CO, NO2 and PM. Various investigations identify key health outcomes to be consistently associated with NO2 and CO. The objective of this study was the measurement-based assessment for determ...

The aim of the study was to determine concentrations of some trace elements (lead, cadmium, chromium, and nickel) in soils along State Road 51 leading from Olsztyn to Olsztynek, northeastern Poland. The traffic flow had a significant effect on the content of heavy metals in soils lying along the road. Further away from the road, and under a lower traffic flow intensity, the amounts of contamina...

Analysts examining large-scale information security repositories for propagating network events are interested in quickly identifying temporal and spatial (IP address and/or port) regions containing interesting phenomena, or correlating events from different time periods. The size of these datasets strains current query capabilities provided by, for example, relational databases. We introduce a...

Accurate traffic dimensioning plays an important role in telecommunications network planning and is particularly important for the performance analysis of mobile and wireless networks. The main goal of cellular operators now a day with the increasing number of mobile subscribers is to keep the subscribers satisfied with the delivered quality of service ( QoS ) . Traffic analysis & optimization ...

A study was initiated in the Winter of 1998 to examine the utility of employing Global Positioning Systems (GPS) to monitor harvest traffic throughout a loblolly pine plantation and utilize traffic intensity information to assess impacts of select soil physical properties. Traffic maps prepared from GPS positional data indicated the highest concentration of traffic intensities occurred in the l...

Abstract Define the traffic intensity as the ratio of the arrival rate to the service rate. This paper shows that the BMAP/PH/s/s+K retrial queue with PH-retrial times is ergodic if and only if its traffic intensity is less than one. The result implies that the BMAP/PH/s/s+K retrial queue with PH-retrial times and the corresponding BMAP/PH/s queue have the same condition for ergodicity, a fact ...