There are important economic and humanitarian applications for systems that can find the source of an odour or volatile chemical buried under the ground. These applications cover the spectrum from harvesting truffles, to finding the location of leaking gas pipes and land mines. This paper presents current progress of the RoboMole project which aims to develop robotic systems that can burrow thr...

Adequate energy stores are essential for survival, and sophisticated neuroendocrine mechanisms evolved to stimulate foraging in response to nutrient deprivation. Food search behavior is usually investigated in young animals, and it is not known how aging alters this behavior. To address this question in Drosophila melanogaster, we compared the ability to locate food by olfaction in young and ol...

JOSE M. F. MOURA CAPS, COMPLEXO, INSTITUTO SUPERIOR TECNICO Av. ROVISCO PAlS P—1096 LISBOA CODEX PORTUGAL

Ultra-Wide Band (UWB) technology stands out as one of the most promising technologies for locating user in indoor scenarios new 5G mobile generation. As a drawback, it requires dense infrastructure. For this study, simulation real environment with UWB and Long Term Evolution (LTE) base stations positioning users is presented, tracked by an Extended Kalman Filter (EKF). The proposed method uses ...

We consider Source Location (SL) problems: given a capacitated network G = (V,E), cost c(v) and a demand d(v) for every v ∈ V , choose a min-cost S ⊆ V so that λ(v, S) ≥ d(v) holds for every v ∈ V , where λ(v, S) is the maximum flow value from v to S. In the directed variant, we have demands d(v) and d(v) and we require λ(S, v) ≥ d(v) and λ(v, S) ≥ d(v). Undirected SL is (weakly) NP-hard on sta...

■ The challenge of precision source location with a radio-frequency antenna array has existed from the beginnings of radiometry and has continued in modern applications with planar antenna arrays. Early work in this field was limited to estimating single source directions in one dimension with systems like crossed-loop radiometers. Currently, more advanced systems attempt to estimate azimuth an...

SUPPLEMENTARY INFORMATION: The Federal Emergency Management Agency (FEMA) publishes proposed determinations of Base (1% annualchance) Flood Elevations (BFEs) and modified BFEs for communities participating in the National Flood Insurance Program (NFIP), in accordance with section 110 of the Flood Disaster Protection Act of 1973, 42 U.S.C. 4104, and 44 CFR 67.4(a). These proposed BFEs and modifi...

Automatic discovery of services is a crucial task for the e-Science and e-Business communities. Finding a suitable way to address this issue has become one of the key points to convert the Web into a distributed source of computation, as they enable the location of distributed services to perform a required functionality. To provide such an automatic location, the discovery process should be ba...