Lack of consideration of the complex European scientific scene from the late 18th century to the mid-decades of the 19th century has produced partial and often biased reconstructions of priorities, worries, implicit and explicit philosophical and at times political agendas characterizing the early debates on species. It is the purpose of this paper firstly to critically assess some significant ...

Reductions in acidic deposition rates through legislative actions North America and Europe have stemmed further environmental degradation shifted the focus to potential recovery [...]

In this paper, we consider the use of multiple mobile software agents to perform different tasks in wireless sensor networks (WSNs). To this regard, determining the number of mobile agents in the WSN remains an open issue in solving multi-agent itinerary planning (MIP) problem. We propose a novel scheme entitled MST-MIP based on minimum spanning tree, where each branch stemmed from the sink cor...

The bifacially-flaked stemmed obsidian artifacts from Easter Island -known as mata’a -vary greatly in terms of the shape and form of their stems. The stem variability appears to be largely stylistic in nature as its variation does not affect the function of the tool and thus is free to change. Since performance is not a factor in structuring variation , patterns of similarity across stylistic c...

The discordance between ‘low’ and ‘high’ primordial D/H measurements can be considerably reduced if the analysis of the H+D profiles accounts for the correlated velocity field of bulk motion. We have re-estimated the value of D/H at z = 3.572 towards Q1937–1009 (‘low’ D/H = (3.3±0.3)×10 [3]) and at z = 0.701 towards Q1718+4807 (‘high’ D/H = (2.0±0.5)×10 [15]) and found that a single D/H value f...

The impact of herbivory on plants is variable and influenced by several factors. The current study examined causes of variation in the impact of larval stem mining by the wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), on spring wheat, Triticum aestivum L. We performed greenhouse experiments over 2 yr to (1) study whether biotic (hollow versus solid stemmed host wheat) and abi...

When studying the use of Cognoter, a multi-user idea organizing tool, we noticed that users encountered unexpected communicative breakdowns. Many of these difficulties stemmed from an incorrect model of conversation implicit in the design of the software. Drawing on recent work in psychology and sociology, we were able to create a more realistic model of the situation our users faced and apply ...