Supporting place-specific interaction through a physical/digital assembly

This article examines visitor interactions with and through a physical/digital installation designed for an open-air museum that displays historic buildings and ways of life from the past. The installation was designed following the “Assembly” design scheme proposed by Fraser et al. (2003), and centred around five principles for the design of interactive experiences. We discuss how the Assembly framework was adapted and applied to our work on the installation called Reminisce, and we then present qualitative data gathered through the shadowing and naturalistic observations of small groups of visitors using Reminisce during their exploration of the museum. Through these data excerpts we illustrate how interaction occurred among visitors and with the assembly. We reflect on the guiding principles of the adapted Assembly framework and on their usefulness for the design of place-specific interactional opportunities in heritage settings. Results from the empirical study show that the adapted Assembly principles provide HCI researchers and designers with ways in which to flexibly support collocated interactions at heritage sites across artefacts and locations in ways that both complement and enrich the physical setting of the visit and its character

Cerebral haemodynamic and metabolic effects of hypnotics and analgesics

Abstract in French La sédation des patients neurochirurgicaux fait appel le plus souvent à une association hypnotique-analgésique. Leurs effets sur l'hémodynamique et le métabolisme cérébraux sont l'un des critères qui président au choix des produits. Les analgésiques utilisés seuls, ont peu d'effets sur le flux sanguin cérébral et la CMRO2. Certaines données de la littérature attribuent aux analgésiques une vasodilatation à la fois cérébrale et systémique, chez les patients atteints de lésions cérébrales expansives. Cette notion est controversée. Concernant la kétamine, plusieurs travaux récents proposent son utilisation à doses infra-anesthésiques en association avec le midazolam, sans élévation de la CMRO2. Le propofol et les benzodiazépines diminuent le flux sanguin cérébral et la CMRO2 de façon dose-dépendante. Les baisses excessives du flux sanguin cérébral rapportées dans la littérature seraient à rattacher à la potentialisation d'autres anesthésiques comme les halogénés ou le protoxyde d'azote. Les effets dépresseurs des barbituriques sur le flux sanguin cérébral et la CMRO2 sont bien connus. Les variations quelquefois observées dans la réponse aux barbituriques seraient en rapport, pour les auteurs, avec le maintien ou non de la réactivité vasomotrice cérébrale

Mouse monoclonal antibodies with anti-A, anti-B and anti-A,B specificities; some superior to human polyclonal ABO reagents

A series of fusions using mouse myeloma cells and spleen cells from mice immunized with blood group substances or human red cells was performed with the aim of obtaining ABO antibodies suitable for routine blood grouping. Seven strongly agglutinating antibodies against antigens in the ABO system were obtained from 18 fusions. These antibodies were tested extensively in manual and automated routines, and six of them were found to be as good as or better than commercial polyclonal test sera of human origin

Immunochemical characterization of a monoclonal anti-Leb blood grouping reagent

A haemagglutinating monoclonal anti-LebL antibody has been obtained from a mouse-mouse hybridoma after immunization with the Leb-active oligosaccharide lacto-N-difucohexaose I, coupled to edestin. Of 13 other antibodies obtained, one was able to agglutinate enzyme-treated erythrocytes of all ABO groups and three more were considered to be anti-LebH haemagglutinins. The remaining nine antibodies did not agglutinate red cells. The specificity of the stronger of the anti-LebL haemagglutinins was examined by studying its binding to a number of glycoconjugates and oligosaccharides