Abstract Agricultural production has replaced natural ecosystems across the planet, becoming a major driver of carbon emissions, biodiversity loss, and freshwater consumption. Here we combined global crop yield environmental data in ~1-million-dimensional mathematical optimisation framework to determine how optimising spatial distribution croplands could reduce impacts whilst maintaining curren...

A questionnaire survey was conducted to investigate the problems involved in the infectious waste recovery at home-visit nursing stations. 1965 nursing stations were selected randomly, and questionnaires were sent to them. Nurses at 1314 stations (66.9%) responded to the survey and responses from 1283 stations were identified as suitable for analysis after excluding 26 stations that closed and ...

Wireless Mesh Network (WMN) is an ad-hoc network with a fixed network infrastructure (see an example in figure 1). The physical structure of a WMN includes base stations, a backbone and mobile stations. The base stations (also known as mesh routers or mesh points) are static wireless nodes, forming the network infrastructure and providing wireless network access to the mobile stations. The back...

Although the EDCA access mechanism of the 802.11e standard supports legacy DCF stations, the presence of DCF stations in the WLAN jeopardizes the provisioning of the service guarantees committed to the EDCA stations. The reason is that DCF stations compete with Contention Windows (CW ’s) that are predefined and cannot be modified, and as a result the impact of the DCF stations on the service re...

Information systems consist of multiple mobile stations and xed stations communicating with each other. Mission critical applications are required to be executed fault-tolerantly in these systems. However, mobile stations support neither enough volume of storage and processing power nor enough capacity of battery to do reliable communication for a long period. Moreover, wireless communication c...