The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
One of the important issues in wireless sensor network (WSN) is to k-cover the target sensing field and to extend its lifetime. We propose a method to k-cover the field and maximize the WSN lifetime by moving mobile sensor nodes to appropriate positions for a WSN consisting of both static and mobile sensor nodes which periodically collect environmental information. Our target problem is NP-hard. So,...
The term Evil Twin refers to a type of rogue wireless access point that appears to be legitimate, but is set up for the purpose of intercepting traffic between mobile users and the Internet. This paper generalizes a known technique into a model we call ldquoend-to-middle security,rdquo which can be adopted by mobile users to protect against Evil Twin attacks. This model involves using a virtual gateway...
In this paper, we propose a new method utilizing mobile sensor nodes to prolong WSN lifetime while maintaining a large sensing area. We formulate this problem as a problem in finding the best positions for mobile sensor nodes to maximize the integral of the sensing area for the remaining lifetime of WSN. This problem implies the Euclidean Steiner Tree Problem, and is thus an NP-hard problem. We developed...
This paper demonstrates Airy Notes system, which monitors environmental condition using tiny sensor modules and shows the characteristics of places intuitively on a map and on a cell phone. The system is designed to help the user's easy understanding of the effect of green by densely placed sensor nodes. We conducted the experiment of the system in Shinjuku Gyoen Garden with 160 sensors. The garden...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.