For state estimation over a communication network, efficiency and reliability of the network are critical issues. The presence of packet dropping and communication delay can greatly impair our ability to measure and predict states. In this paper, multiple description (MD) codes, a type of network source codes, are used to compensate for this effect on Kalman filtering. We consider two packet dr...

Abstract We combine phone-survey data from 2,200 students collected in July–August of 2020 with student-level administrative 54 schools four northwestern provinces Cambodia to investigate the implications COVID-19 pandemic for grade 9 students. These were particularly vulnerable dropping out school prematurely due crisis. find that most kept studying during crisis, returned participate lower-se...

This article examines characteristics, practices and conditions within schools that enable vulnerable students to succeed in school. Research suggests factors related structure, educational organisation or the climate may play a part either pushing out holding on whose personal characteristics put them at risk of dropping out. The study is based 25 qualitative interviews with second year vocati...

This paper studies pricing strategies for networks with stochastic capacity variation. Call-level simulation is used to compare the profit generated with four different pricing models, and with different policies for the management of call dropping episodes in the network. Both user-oriented and network-oriented performance metrics are considered. The simulation results show that the choice of ...