Suppose that a fence needs to be protected (perpetually) by k mobile agents with maximum speeds v1, . . . , vk so that no point on the fence is left unattended for more than a given amount of time. The problem is to determine if this requirement can be met, and if so, to design a suitable patrolling schedule for the agents. Alternatively, one would like to find a schedule that minimizes the idl...

Epigenetic mechanisms may be important for a native species' response to rapid environmental change. Red Imported Fire Ants (Solenopsis invicta Santschi, 1916) were recently introduced to areas occupied by the Eastern Fence Lizard (Sceloporus undulatus Bosc & Daudin, 1801). Behavioral, morphological and physiological phenotypes of the Eastern Fence Lizard have changed following invasion, creati...

Non-volatile memory (NVM) promises fast, byte-addressable and durable storage, with raw access latencies in the same order of magnitude as DRAM. But in order to take advantage of the durability of NVM, programmers need to design persistent objects which maintain consistent state across system crashes and restarts. Concurrent implementations of persistent objects typically make heavy use of expe...

This study describes the effects of garden-based education on children's vegetable consumption. As part of a pre-post panel study, 236 students complete the Garden Vegetable Frequency Questionnaire and 161 complete a taste test. Results indicate that school gardening may affect children's vegetable consumption, including improved recognition of, attitudes toward, preferences for, and willingnes...

Abstract In this paper, the exact formulae for the Harary indices of join, disjunction, symmetric difference, strong product of graphs are obtained. Also, the Schultz and modified Schultz indices of join and strong product of graphs are computed. We apply some of our results to compute the Harary, Schultz and modified Schultz indices of fan graph, wheel graph, open fence and closed fence graphs.

A’ view of nature within the framework of garden and in relation with human needs and drives that satisfy theneed to be rooted has caused the representation of nature in garden to be regarded as cultural heritage. Garden and garden designing are suitable cases for us to study cultural characteristics and traits. Thus, human beings have searched their eternal interest in an ideal and unattainabl...

We study a new search problem on the plane involving a robot and an immobile treasure, initially placed at distance 1 from each other. The length β of an arc (a fence) within the perimeter of the corresponding circle, as well as the promise that the treasure is outside the fence, is given as part of the input. The goal is to device movement trajectories so that the robot locates the treasure in...

Free-roaming cats are exposed to a variety of risks, including involvement in road traffic accidents. One way of mitigating these risks is to contain cats, for example using an electronic boundary fence system that delivers an electric 'correction' via a collar if a cat ignores a warning cue and attempts to cross the boundary. However, concerns have been expressed over the welfare impact of suc...