Tensile testing apparatus

An improved mechanical extensometer is described for use with a constant load creep test machine. The dead weight of the extensometer is counterbalanced by two pairs of weights connected through a pulley system and to rod extension and leading into the furnace where the test sample is undergoing elevated temperature (above 500 F.) tensile testing. Novel gripper surfaces, conical tip and flat surface are provided in each sampling engaging platens to reduce the grip pressure normally required for attachment of the extensometer to the specimen and reduce initial specimen bending normally associated with foil-gage metal testing

Explaining cross-cultural service interactions in tourism with Shenkar’s Cultural Friction

In this paper, we commence a new dialogue on cross-cultural research in tourism. Using Shenkar’s (2001) metaphor of cultural friction as the analytical framework, we examine crosscultural service interactions between guests and service-providers in a luxury hotel. Cultural friction departs from, and extends, the notion of ‘cultural distance’, as it recognises asymmetry in social-economic conditions and considers the goals and the influence of control and power between the interacting parties. We use the Critical Incident Technique and Narrative Inquiry as the data collection technique and analytical approach respectively. The findings reveal that guests and service-providers use a number of strategies to exert power and gain control during their interactions, including subjective essentialism and stereotyping, to achieve their goals. The implications for tourism and hospitality management include providing cross-cultural sensitivity training to service-providers, ensuring a cultural-diverse employee composition, and to foster cross-cultural understanding amongst employees. We further suggest to develop strategies to facilitate effective cross-cultural service interactions based on evidence about cultural norms, expectations and behaviours from specific cultural groups. Further research is recommended to connect specific interactions between the interacting parties to examine whether the various strategies used leads to effective cross-cultural communication

Suppressive effects of monocytic cells and transforming growth factor-beta on natural killer cell differentiation in autoimmune viable motheaten mutant mice.

Viable motheaten (mev) mice are homozygous for a recessive single gene mutation at chromosome 6. These mice develop numerous inflammatory and arthritic syndromes and exhibit abnormal B cell functions as well as lower T and NK cell activity. In this study, the differentiation of NK cells in mev mice was examined to elucidate the underlying basis for decreased NK activity. Although NK cells appear to be present in mev mice, their activity was demonstrable only when the spleen cells were enriched by nylon wool passage. Similarly bone marrow cells from these mice could be shown to contain precursors of NK cells when they were passed over nylon wool and transplanted into irradiated recipients. The adherent cells from both the spleen and bone marrow of mev mice suppressed the differentiation of NK cells from normal splenic populations. These suppressive adherent cells were F4/80(+), AsGm-1(+), Qa-5(+), and NK-1.1(+). They were not cytolytic when cultured in IL-2. Antibodies to a number of cytokines, such as IFN-alpha, -beta, and gamma, or TNF-alpha, could not reverse the suppressive effect of the adherent cells. Addition of anti-TGF-beta antibody could, however, overcome the suppression, suggesting that TGF-beta was partly responsible for the defective NK differentiation in the mev mice