We present a tutorial system for language learners, using a computational grammar augmented with mal-rules for analysis, error diagnosis, and semantics-centered generation of corrected forms. Corrections are produced using a novel strategy of

The notion of treewidth has seen to be a powerful vehicle for many graph algorithmic studies. This survey paper wants to give an overview of many classes of graphs that can be seen to have a uniform upper bound on the treewidth of graphs in the class. Also, some mutual relations between such classes are discussed.

Mangrove ecosystems are vulnerable to pollution such as marine debris. The presence of debris can affect the waterbird community. present study aims determine and analyze effect on waterbirds in Muara Angke Area. research was undertaken from October November 2020 at three areas: Angke-Kapuk Protection Forest, Nature Tourism Park, Arboretum. Observations were carried out using point count method...

Plantings’ ornamentality is an important aspect of the aesthetic appearance formation urbanized landscapes. In urban ecosystems, trees and shrubs are often exposed to high stress levels that shortens their lifespan reduces ornamentality. Plant introduction one methods enriching assortment with resistant species. The aim research was comprehensively assess degree North American tree groups from ...

We describe a method for generating location estimates for a photograph by automatically matching it to satellite imagery. First, a user labels interest points in the photograph corresponding to stationary objects also identifiable from the air. We show how to compute robust invariants which can be matched against a large database of satellite views, and we evaluate several invariants on simula...

*Plant Science and Conservation, Chicago Botanic Garden, Glencoe, Illinois, USA; †Plant Biology and Conservation, Northwestern University, Evanston, Illinois, USA; ‡Herbarium, Morton Arboretum, Lisle, Illinois, USA; §Ecology, Evolution, and Behavior, Plant Biological Sciences, University of Minnesota, Saint Paul, Minnesota, USA; ∥Department of Biology, McGill University, Montréal, Québec, Canad...

THL~, beach plum, Prunus maritima, in typical form, is a rugged bush native to the coastal areas of northeastern United States. As part of the wild landscape in that section it is most showy when in flower during May. So white and so bold is its display of bloom that back in ]932 Edgar Anderson and Oliver Ames of the Arnold Arboretum were able to plot the wild distribution of the plant from the...

An unusual variant of Meloidogyne arenaria was discovered on roots of a traveler's tree (Ravenala madagascariensis) intended for display at a public arboretum in Pennsylvania. The population aroused curiosity by the lack of visible galling on the roots of the infected plant, and the female vulval region was typically surrounded by egg sacs. Most morphometrics of the population fit within the ra...

The present work dealt with RAPD markers for genetic diversity comparison estimation in twenty three cotton varieties of Bt and non-Bt cotton cultivars belonging to two cultivated species of cotton in Andhra Pradesh state, India.Variations among twenty three different cotton varieties were analyzed with selected 40 RAPD primers using the polymerase chain reaction (PCR). All the primers produced...