in this paper mathematical extensions and generalizations of the pearl-reed model for'growth with saturation are discussed. the derived differential equation are of bernoulli and riccati type that owing to their special forms could be explicitely integrated resulting in closed form solutions. the asymptotic bahaviour of the system in each case is briefly examined and the results are compar...

This paper discusses a motion planning method for assembling a ring-shaped elastic part to a cylindrical part by using a dual-arm manipulator. When assembling a ring-shaped elastic part, it is important to keep the amount of elastic deformation as small as possible during the assembly task. To achieve this purpose, we show that it is effective to utilize the Covariant Hamiltonian Optimization a...

In addition to its conventional meaning of “preparing for future situations”, energy planning addresses policy making, in particular in situations where self-regulating markets are perceived as inadequate for reaching given policy goals. A general example for such a situation is given by the presence of non-monetary externalities, that is, costs or benefits that are not included in market inter...

Energy is becoming a main concern nowadays due to the increasing demands on natural energy resources. Base stations (BSs) consume up to 80% of the total energy expenditure in a cellular network. In this paper, we propose and evaluate a green radio network planning (RNP) approach by jointly optimizing the number of active BSs and the BS on/off switching patterns based on the changing traffic con...

For the first time, the problem of optimizing energy for communication and motion is investigated. We consider a single mobile robot with continuous high bandwidth wireless communication, e.g. caused by a multimedia application like video surveillance. This robot is connected to a radio base station and moves with constant speed from a given starting point on the plane to a target point. The ta...

The new EU policy for climate protection and promotion of renewable energies introduces under other strategies the concept of buildings as power plants. This concept is based on so called Energy-Plus-House, the next generation of Passive House – a building that would produce more energy than it consumes. Even though the institutional policies do promote the new, innovative forms of buildings an...

The great attention toward environmental issues and especially on energy utilization, leads the European Union to implement the 2009/28/EC Directive, fixing three main goals to be achieved for 2020 by the EU member states: 20% reduction of the greenhouse gases emission, 20% increase of using renewable energy and 20% improving of energy efficiency. To achieve these objectives, new environmental ...

Abstract Background A sustainable energy system based on renewables, energy-efficiency, decentralisation of generation and synergies between different sectors requires new planning methods policies. Energy transition climate change mitigation achievement can no longer be seen only through top-down activities from a national government. Local regional governments have crucial role in delivering ...