While widely accepted models of labor market search imply a constant reservation wage policy, the empirical evidence strongly suggests that reservation wages decline in search duration. This paper reports the results of the rst realtime-search laboratory experiment. The controlled environment subjects face is stationary, and the payoff-maximizing reservation wage is constant. Nevertheless, subj...

Real time GPS measurements are becoming an essential part of surveying. During the last years several real time methods have been introduced. One of the most sophisticated one, Virtual reference station (VRS) is using GPS network to mitigate errors inherent to GPS positioning. The quality of VRS was studied in such conditions that are typical in Finland and northern latitudes. The study was div...

In a classical wireless sensor network, endowed with typical hardware features, especially with high energy level and good stockpiling capabilities, the base station completes the architecture as a required component for a wide range of applications. However, there are some projects where base station deployment should be avoided without reducing network efficiency. A cold storage logistic supe...

In this paper, we address the problem of collecting data from sensor nodes using a model-aided approach. In our approach, a model is maintained by a node and a replica of the model is maintained the base station. The base station uses the replica model to estimate the actual measurement data of the sensor node in usual time, and an actual measurement datum is sent to the base station only when ...

We successfully contract timetable networks with realistic transfer times. Contraction gradually removes nodes from the graph and adds shortcuts to preserve shortest paths. This reduces query times to 1ms with preprocessing times around 6 minutes on all tested instances. We achieve this by an improved contraction algorithm and by using a station graph model. Every node in our graph has a one-to...

aid uses, including fire stations, according to critical activities that are responsible, in comparison to other city services, are more important. identify areas where are located outside of the fire stations covered services can help urban planners to site selection of this important land use. the purpose of this paper is detection the areas that are beyond the services coverage of the fire s...

Advances in wireless communication technologies have enabled the networking of devices, which conventionally operated standalone, to form an Internet of Things (IoT). A typical network architecture consists of a set of data sources that report to a base station (BS), e.g., a data aggregation unit, over multi-hop paths. An example of such a network operation model includes surveillance of an una...

during the planning of an UMTS radio network, there is a natural need for a base station positioning procedure. Good coverage at an acceptable level of network installation and maintaining costs, low interference and uniform interface load are the main requirements. In this paper we present an approach based on simulated annealing.

In this paper we investigate the properties of the PROFIBUS MAC protocol when operated over error prone links, like wireless links. In order to show that the protocol is very sensible to loss of control frames (e.g. token frames) we evaluate three performance measures, using a simulation approach: the mean delay, the mean station outage time and the cumulated outage time, i.e. the fraction of t...

In this paper, a token-controlled network with exhaustive service strategy is analyzed. The mean and variance of service time of a station, and the mean token rotation time on the network are derived under the condition that the buffer capacity of each station is individually finite. For analysis, an extended stochastic Petri-net model of a station is presented. Then, by analyzing the model, th...