1. Holding a meeting At the SRI Artificial Intelligence Lab, we have a long history of building autonomous robots, from the original Shakey (remember the STRIPS planner?) through Flakey [Congdon 1993] and more recently, the Pioneer class of small robots. Our current research focuses on realtime vision for robots, and multirobot planning using an agent-oriented architecture. For the AAAI contest...

Methane ebullition (bubbling) from lake sediments is an important methane flux into the atmosphere. Previous studies have focused on open-water season, showing that temperature variations, pressure fluctuations, and wind-induced currents can affect ebullition. However, surveys during ice-cover are rare despite prevalence of seasonally ice-covered lakes, factors controlling poorly understood. He...

Many lakes have experienced a transition from a clear into a turbid state without macrophyte growth due to eutrophication. There are several measures by which nitrogen (N) and phosphorus (P) concentrations in the surface water can be reduced. We used the shallow lake model PCLake to evaluate the effects of three measures (reducing external nutrient loading, increasing relative marsh area, and i...

Online monitoring and water quality analysis of lakes are urgently needed. A feasible and effective approach is to use a Wireless Sensor Network (WSN). Lake water environments, like other real world environments, present many changing and unpredictable situations. To ensure flexibility in such an environment, the WSN node has to be prepared to deal with varying situations. This paper presents a...

Synaptogenesis is thought to be mediated by cell adhesion proteins, which induce the initial contact between an axon and its target cell and subsequently recruit and organize the presynaptic and postsynaptic protein machinery required for synaptic transmission. A new study by Linhoff and colleagues in this issue of Neuron identifies adhesion proteins of the LRRTM family as novel synaptic organi...

nature has always proven that it is able to overcome its problems. however, humanmanipulation has led to environmental degradations. the dryness of a thousand-year urmia lake(a brine water lake in iran) is an example of environmental degradation that happened due tosuccessive droughts and construction of dams on the basin of this lake. this study examinesmethods for the revival of urmia lake by...

introduction azarshahr plain is one of the plains adjacent tothe lake urmia that has been faced, during recent years,withover extraction of groundwater and alsoexposed to salinity enrichment. on the other hand, urmia lake with about 5000 square kilometers is the relatively vastlake with hyper-saline water as a rare biosphere resource in iran and the world. this lake has a great economic, social...

Abstract The pH value of lake water varies with the environment, which has an effect on form phosphorus in sediment, and then release sediment phosphorus. sediments was analyzed using field sampling. environmental conditions values 4.0, 7.0 10.0 were simulated indoors to estimate effects from content change various forms studied. results showed that Wuliangsuhai Lake, Ca-P accounted for 54.3%, ...

Drop coalescence is central to diverse processes involving dispersions of drops in industrial, engineering, and scientific realms. During coalescence, two drops first touch and then merge as the liquid neck connecting them grows from initially microscopic scales to a size comparable to the drop diameters. The curvature of the interface is infinite at the point where the drops first make contact...