Penta-Extensions of Hereditary Classes of Graphs

Penta is the configuration shown in figure 1(a), where continuous lines represent edges and dotted lines represent non-edges. The vertex u in figure 1(a) is called the center of Penta. A graph G is called a pentagraph if every induced subgraph H of G has a vertex v which is not a center of induced Penta in H. The class of pentagraphs is a common generalization of chordal [triangulated] graphs and Mahadev graphs. We construct a polynomial-time algorithm that either find a maximum stable set of G or concludes that G is not a pentagraph. We propose a method for extending α-polynomial hereditary classes based on induced Pentas.     

A unique collaboration of female medical providers within the United States Armed Forces: rehabilitation of a marine with post-concussive vestibulopathy

Uncle Sam's loyal nieces have come a long way from the days of World War I. The development of occupational and physical therapy was heavily influenced by an early relationship with medical specialists during the First World War. This relationship can be considered largely responsible for the eventual acceptance (by the Armed Forces) of women working in this area. Over the past decade active duty women have seen many changes in opportunities to serve and are now stationed aboard aircraft carriers, performing roles previously considered for male personnel. We report a case study of the medical care provided by both military and civilian women working for the United States Armed Forces. Initial assessment was conducted in a battalion aid station of a United States Marine Corp base and the subject was then referred to a military medical center with highly technical vestibular assessment and rehabilitation services. The subject's case represents a unique collaboration of women therapists, enabling a Marines' access to timely and accurate assessment, treatment and ultimately, successful return to active duty. This case study is one of many examples of the acceptance and successful integration of women as providers of medical care within the Military's medical framework.     

Metabolomics: opening another window into aging

Metabolomics is based on the simultaneous analysis of multiple low-molecular-weight metabolites from a given sample. As such, metabolomics seeks the most up-to-date information about the state of interaction between an organism and its environment. The ability to use metabolomics approaches for classification and mechanistic studies may influence and augment our ability to study and address the aging process scientifically and clinically.     

ECONOMIC CALCULATION UNDER SOCIALISM: THE AUSTRIAN CONTRIBUTION

Economic theories of socialism during the 1930's were based on Walrasian general equilibrium models in which the central planning board was to function as the auctioneer. Socialists assumed that "market socialism" would achieve all the efficiencies characteristic of perfect competition while avoiding the serious market failures of real capitalist economies. The Austrians, Ludwig von Mises and Friedrich Hayek, argued that even market socialism would fail to 'achieve the efficiency of real market capitalism because Walrasian models used to construct the economic theory of socialism left out important features of real markets that generate efficient outcomes. Specifically, the entrepreneurial nature of the adjustment process, the importance of decentralized information and the role of incentives under vaying institutional settings.     

Tracing developmental trends in Ira Gordon's programs for children and families

Ira Gordon's work in the area of child and family services is traced for six of his programs according to two main trends: (1) perceptions of families through the years and the changing roles of parents in the education of their children; and (2) curriculum changes in activities brought into homes. Gordon's programs, some being initiated as early as 1966, focused upon parents, infants, toddlers, and school-age children and utilized home visitations as a major intervention strategy. Evidence of successes reported for these programs has shown the impact of early intervention upon children as well as their families, school, and community.     

Problem defining and the consulting/intervention process

Although many different approaches are currently being used to create planned change in organizations, Kilmann and Mitroff feel that too little attention has been paid to determining the effectiveness of these different methods in solving the organizations' problems. Based on intervention theory and the consulting process, the authors offer a method of evaluating an organization's approach to change to determine if it is well-suited to the types of problems being experienced. The process of change is diagrammed as a five-step cycle: 1) sensing problems; 2) defining problems; 3) deriving solutions; 4) implementing solutions; and 5) evaluating outcomes. Most consultants enter the process at step 3 which increases the probability that they will try to solve the wrong problem (termed Type III error). A second source of trouble is that consultants are usually trained in one or two disciplines and, therefore, see problems primarily in those perspectives. Kilmann and Mitroff suggest the use of teams of consultants so the problems can be conceptualized from a number of different viewpoints.