Software analytics builds quality prediction models for software projects. Experience shows that (a) the more projects studied, the more varied are the conclusions; and (b) project managers lose faith in the results of software analytics if those results keep changing. To reduce this conclusion instability, we propose the use of “bellwethers”: given N projects from a community the bellwether is...

In order to close the sense-plan-act loop, a robot requires several capabilities: it must match perceived context with general knowledge about the environment, instantiate plans into the metric space of the real world, and detect and react to contingencies. All of these capabilities include some form of spatial reasoning — however, at different levels of abstraction. Perception generates metric...

For the current on-site evaluation of the environmental contamination and contributory external exposure after the accident at the Chernobyl Nuclear Power Plant (CNPP) and the nuclear tests at the Semipalatinsk Nuclear Testing Site (SNTS), the concentrations of artificial radionuclides in soil samples from each area were analyzed by gamma spectrometry. Four artificial radionuclides ((241)Am, (1...

From tomorrow onwards, we will be working with toric stacks, but today we’ll be more general. Let f : Γ → X be a stable representable morphism from an orbi-curve to a stack. An orbi-curve is a proper, projective, algebraic curve Γ with some marked points xi. Each of the marked points has a chart of the form [∆/μri ] (where ∆ is a disk and μr is the group of r-th roots of unity). An orbi-curve h...

In this paper we consider lightweight routing in a wireless sensor network deployed in a complex geometric domain Σ with holes. Our goal is to find short paths of different homotopy types, i.e., paths that go around holes in different ways. In the example of Figure 1, there are three holes in the network and there are many different ways to “thread” a route from s to t. Observe that paths α, β,...

BACKGROUND Mycoplasma pneumoniae, a bacterium known to be a common cause of pneumonia, has been documented to cause complications such as debilitating mucositis previously described as an atypical Stevens-Johnson syndrome without skin lesions. However, in the spectrum of epidermal dermatopathies, the condition is increasingly recognized as a separate entity, now termed M. pneumoniae-associated ...

We discuss in this paper various aspects of the off-critical O(n) model in two dimensions. We find the ground-state energy conjectured by Zamolodchikov for the unitary minimal models, and extend the result to some non-unitary minimal cases. We apply our results to the discussion of scaling functions for polymers on a cylinder. We show, using the underlying N =2 supersymmetry, that the scaling f...

the concentration of pollutants around tall buildings can be influenced by many factors such as down wind effects, waves, airflow due to free convection of heat transfer, building height etc. the main objective of this research was the investigation of the variation of pollutants concentration at different heights around tall buildings. research was carried out measuring parameters such as co o...