The respiratory tract has been used to deliver biologically active chemicals into the human body for centuries. However, the lungs are complex in their anatomy and physiology, which poses challenges to drug delivery. Inhaled formulations are generally more sophisticated than those for oral and parenteral administration. Pulmonary drug development is therefore a highly specialized area because of its many unique issues and challenges. Rapid progress is being made and offers novel solutions to existing treatment problems. Advances in Pulmonary Drug Delivery highlights the latest developments in this field.

The study of noncommutative rings is a major area in modern algebra. The structure theory of noncommutative rings was originally concerned with three parts: The study of semi-simple rings; the study of radical rings; and the construction of rings with given radical and semi-simple factor rings. Recently, this has extended to many new parts: The zero-divisor theory, containing the study of coefficients of zero-dividing polynomials and the study of annihilators over noncommutative rings, that is related to the Koethe's conjecture; the study of nil rings and Jacobson rings; the study of applying ring-theoretic properties to modules; representation theory; the study of relations between algebraic and concepts of other branches (for example, analytic and topological), etc. Thus, noncommutative rings are ubiquitous in mathematics, and occur in numerous sciences.This volume consists of a collection of original articles refereed by world experts that was presented at the Sixth China-Japan-Korea International Conference on Ring Theory. These articles exhibit new ideas, tools and techniques needed for successful research and investigation in noncommutative ring theory, and show the trend of current research. It is a useful resource book for beginners and advanced experts in ring theory.

The respiratory tract has been used to deliver biologically active chemicals into the human body for centuries. However, the lungs are complex in their anatomy and physiology, which poses challenges to drug delivery. Inhaled formulations are generally more sophisticated than those for oral and parenteral administration. Pulmonary drug development is therefore a highly specialized area because of its many unique issues and challenges. Rapid progress is being made and offers novel solutions to existing treatment problems. Advances in Pulmonary Drug Delivery highlights the latest developments in this field.

Box set containing all four films from the popular 'Lethal Weapon' series. In 'Lethal Weapon' (1987), Roger Murtaugh (Danny Glover) is a family man cop who is about to turn fifty. Cautious by nature, he is less than happy to be paired with Martin Riggs (Mel Gibson) when he is assigned to investigate Californian drug baron 'The General' (Mitchell Ryan). Following the death of his wife, Riggs has become a manic loner who no longer cares whether he lives or dies - an approach which causes more than a few problems as he and Murtaugh attempt to bring the General to justice. In 'Lethal Weapon 2' (1989), Riggs (Gibson) and his partner Murtaugh (Glover) once again tackle the evils of drug smuggling, this time coming up against a South African syndicate whose kingpins are protected by diplomatic immunity. In 'Lethal Weapon 3' (1992), Detectives Murtaugh (Glover) and Riggs (Gibson) are both demoted after triggering a car bomb in a multi-storey car park, but they are soon reinstated after uncovering a network - run by an ex-cop - which is smuggling weapons out of a police ammunition dump. Finally, in 'Lethal Weapon 4' (1998), mismatched cops Riggs (Gibson) and Murtaugh (Glover) team up for a fourth time to foil an immigrant smuggling racket, run by a ruthless Asian Triad leader (Jet Li). Joe Pesci also returns as Leo Getz, the cops' cowardly informant whilst Rene Russo leavens the boys with toys atmosphere as risk-taking detective Lorna Cole.