Dry sliding wear of active screen plasma carburised austenitic stainless steel

Low temperature diffusion treatments with nitrogen and carbon have been widely used to increase the tribological performance of austenitic stainless steels. These processes produce a layer of supersaturated austenite, usually called expanded austenite or S-phase, which exhibits good corrosion and wear resistance. The novel active screen technology is said to provide benefits over the conventional DC plasma technology. The improvements result from the reduction in the electric potential applied to the treated components, and the elimination of such defects and processing instabilities as edge effects, hollow cathode effects and arcing. In this study, AISI 316 coupon samples were plasma carburised in DC and active screen plasma furnaces. The respective layers of carbon expanded austenite were characterised and their tribological performance was studied and compared. Detailed post-test examinations included SEM observations of the wear tracks and of the wear debris, EDX mapping of the wear track, EBSD crystal orientation mapping of the cross sections of the wear tracks, and cross-sectional TEM. Based on the results of wear tests and post-test examinations, the wear mechanisms involved are discussed.

Wear mechanisms and microstructure of pulsed plasma nitrided AISI H13 tool steel

AISI H13 tool steel discs were pulsed plasma nitrided during different times at a constant temperature of 400 °C. Wear tests were performed in order to study the acting wear mechanisms. The samples were characterized by X-ray diffraction, scanning electron microscopy and hardness measurements. The results showed that longer nitriding times reduce the wear volumes. The friction coefficient was 0.20 ± 0.05 for all tested conditions and depends strongly on the presence of debris. After wear tests, the wear tracks were characterized by optical and scanning electron microscopy and the wear mechanisms were observed to change from low cycle fatigue or plastic shakedown to long cycle fatigue. These mechanisms were correlated to the microstructure and hardness of the nitrided layer.

Organizational factors in the diffusion of an industry standard: implementing an online documentation system for Australian exporters

At present, governments in many countries are actively engaged in the development of electronic trading and certification standards to enable the smooth operation of export markets. Standards and their usability underpin confidence in the operations of markets and their effective functioning. In institutional markets, an important role for government agencies lies in developing the initial specifications for standards for interoperable systems. Once these specifications are accepted, governments can then facilitate the eventual diffusion of a standard to the B2B marketplace. Acceptance of an industry standard can determine demand, which defines the viability of that market. In this paper, we describe an initiative by a government agency, the Australian Quarantine and Inspection Service (AQIS), in developing EXDOC, a standard for export documentation and the role that AQIS played in its implementation and diffusion. Our case study illustrates a successfully facilitated B2G implementation. It demonstrates how a standard can be supported and promulgated for the effective functioning of markets in the transition from manual to online export documentation. Once the overarching specifications for related industries have been established and diffused by government, opportunities arise for private sector markets to develop across these industries. Government agencies can promote the effective operation of standards for electronic markets. The EXDOC implementation and its iterations provide an exemplar of active engagement in the development of electronic trading and certification standards for an institutional market. Its successful diffusion provides a model of the implementation process for other export sectors and agencies.

Teledermatology: The Case of Adoption and Diffusion of Telemedicine Health Waikato in New Zealand

Telemedicine emerged as a possible solution to New Zealand health providers in reaching out to rural patients, by offering medical services and conducting administrative meetings and training. However, despite the rapid growth and high visibility of these projects in countries like the United States, relatively few patients are now being seen through telemedicine. Accordingly, this research attempts to investigate telemedicine's effectiveness in New Zealand by using a theoretical framework. Thus, the purpose of this paper is to explain factors influencing the adoption and diffusion of telemedicine utilising the video conferencing technology (TMVC) for dermatology within Health Waikato Ltd. (HW).

Cr(N,C) diffusion coating formation on pre-nitrocarburised H13 tool steel

The microstructural processes of Cr(N,C) coating formation by thermoreactive deposition and diffusion (TRD) on pre-nitrocarburised H13 tool steel were studied. Both nitrocarburising and TRD were performed in fluidized bed furnaces at 570 °C. During TRD, chromium was transferred from chromium powder in the fluidized bed, to the nitrocarburised substrates by gas-phase reactions initiated by reaction of HCl gas with the chromium. Addition of 30% H2 to the input inert gas was found to increase the rate of coating formation, although hydrogen reduction resulted in rapid loss of nitrogen to the surface. The reason for the increased rate of coating formation could not be established without further investigation, although several possible explanations have been proposed. It was found that porosity and the formation of an iron nitride ‘cover layer’ during nitrocarburising were the biggest influences on the microstructure of the Cr(N,C) coating. Microstructural characterization of the coatings was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and glow discharge optical emission spectroscopy (GDOES).

What are we scared of? The absence of sociology in current debates about drug treatments and policies

The official public policy related to recreational drug use and abuse in Australia is harm minimization or harm reduction. Definitions of harm minimization vary but a general statement is that harm minimization is a policy or programme intended to decrease adverse health, social and economic consequences of drug use, even though the user may continue to use psychoactive drugs. This type of definition is most often compared to a zero-tolerance policy that aims to eliminate all recreational drug abuse by legal and other means. Sociologists have historically scoffed at this latter policy. Unfortunately, what this has meant is that harm minimization in all its forms has not been the object of analytical work on the part of sociologists.

Norm diffusion within international organizations: a case study of the World Bank

Constructivists often argue that International Organizations (IOs) diffuse norms throughout the international system. This article asks the question: if IOs promote and diffuse specific norms within world politics, where do these norms come from? In particular, this analysis seeks to formulate how IOs' identities emerge in issue areas where rationalist theories give limited explanation, such as the environment. This article posits that IOs interact with and consume norms from non-state actors such as transnational advocacy networks, a process overlooked by the constructivist analysis of institutions. This is examined through a case study of the World Bank's environmental identity where transnational advocacy networks played an important role in the Bank's shift towards sustainable development, through processes characterized here as direct and indirect socialization. This article demonstrates that the Bank's shift was more than instrumental as a result of this interaction, and that constructivists therefore need to examine the role of IOs as norm consumers as well as norm diffusers.

Theorizing norm diffusion within international organizations

International Organizations (IOs) promote and diffuse norms within world politics. This prompts the question: where do these norms come from? This inquiry analyses how IOs have been perceived within the emerging norms literature where IOs are 'norm diffusers' within the international system, and finds that the way in which IOs themselves internalize norms has not been taken into account. This poses a potentially fruitful new avenue of inquiry into why and when IOs behave as norm diffusers. An interpretation of when and why IOs internalize norms is offered by positing that IO identities are not fixed and that they are 'norm consumers' socialized by state and non-state actors.

The influence of demographic, behavioural and treatments characteristics on problem gambling counselling outcomes

The paper considers the influence of client characteristics and gambling behaviour as well as treatment modality on the resolution of gambling behaviour for 591 clients who sought help from the publicly funded BreakEven counselling services in the state of Victoria between 1 July 1996 and 30 June 1997. Statistical data about clients and their consultations was collected in the form of a Minimum Data Set. On their own, client demographics accounting for 12% of the variance were identified as discriminating between problem gamblers who achieved some resolution of their gambling behaviour and those whose behaviour did not change. Variables associated with gambling behaviour accounted for 10% of variance and treatment variables for 12% of variance in treatment outcomes. Collectively, the three types of data could explain 26% of the variance in problem resolution. Importantly, these findings demonstrate that the resolution of problematic gambling behaviour is affected by a complex interplay of client characteristics, their gambling behaviour and the treatment they receive. It is argued that the evaluation of treatment programs for problem gambling, and potentially all counselling programs in the primary health arena, needs to include measures from each of these domains.