In the horizontal simple scenarios, nodes are placed in open areas of our fifth floor, while in the horizontal obstacle scenarios the nodes are placed inside rooms to analyze the effect of obstacles (walls).
Another example of an environmental factor affecting foraging, sometimes referred to as the 'edge effect', is the tendency for ants to follow walls and the edges of obstacles (Dussutour et al. 2005).
The wall roughness and the presence of obstacles in the flame path act as a turbulence generator causing continuous flame acceleration.
With regards to the indoor scenario's characteristics, the presence of obstacles and walls may obstruct the line-of-sight (LOS) between location network nodes.
However, it can also be used in applications when prediction of heading is needed--e.g., in a movement model--in an indoor/outdoor environment with known floor-plans and maps where the possible headings are reduced because of obstacles and walls.
When the target is in the vicinity of obstacles, for example, walls or doors, location estimates highly deviate from the true location.
The room was free of obstacles so that all walls were visible from any corner of the room.
Due to the presence of obstacles with different propagation characteristics (wooden office partition walls, concrete elevator shaft, brick walls around kitchen, and toilets), communication properties of links can vary greatly based on the specific location of sender and receiver node.
In most cases, the indoor environments are complex and exposed to a variety of obstacles such as furniture, partitions, and walls.
(i) The number of obstacles inside the environment under consideration: the more the walls are, the more reflective and diffractive effects that will occur.
