Search results

Compares the corrosion behaviour of Ti6Al4V titanium alloy, a conventional duplex stainless steel (UNS 31803) and AISI 304 austenitic stainless steel in synthetic biofluids using electrochemical techniques and comments on the suitability of DSS for use in biomedical applications. Finds that the general corrosion resistance of duplex stainless steels is slightly inferior to that of austenitic stainless steel and titanium alloy; duplex stainless steel does not show any sign of pitting when exposed to synthetic biofluids and exhibits excellent resistance to localised corrosion on par with that of titanium alloy. Concludes that duplex stainless steels are one of the best alternates to titanium alloys.

The properties of the recently developed alloy SAF 2304 and of other duplex stainless steels are reviewed. When stress corrosion cracking is a potential problem, this group of alloys offers advantages as compared to the standard austenitic stainless steels AISI 304†316. This is even more true when the high yield strength and the physical properties of the duplex stainless steels can be utilized. When duplex stainless steels do not have sufficient corrosion resistance, Sanicro 28 is a suitable material selection.

The report is focused on Sanicro 28, an alloy with 27% Cr, 31% Ni, 3.5% Mo, 1% Cu, and its performance as compared with that of AISI 316. The results of potentiostatic and potentiodynamic measurements in neutral and acid chloride solutions are presented. Equilibrium calculations on hydrolysis and chloride complexing have been made. Results of long‐term tests and practical experience are reported.

This chapter explores the empowering potential of research conducted with an activist orientation. It focuses on the story of four migrant workers employed in a Norwegian fish-processing plant, who, supported by the local trade union and along with 67 colleagues, resisted against exploitative working, employment, and living conditions. Meant as a study of the emergence and dynamics of criminological activism, this chapter reflects the capacities in which researchers tend to act to challenge the normalisation of state-corporate harms and to empower those victimised by these harms, as well as on the pitfalls of these approaches. In so doing, this chapter points to the parallels between state-corporate criminology, labour perspective on human trafficking, social harm, and zemiology. Ultimately, it calls for heightened reflexivity and critical intellectual distance from activist researchers.

The context in which an innovation is implemented is an important and often neglected mediator of change. A prospective payment system (PPS) for psychiatric and psychosomatic facilities with major implications for inpatient psychiatric care in Germany was implemented from 2013 to 2017. This study aims to examine the determinants of implementation of this government policy using the Diffusion of Innovations theory and consider the role of context.

An exploratory case study was conducted in two wards of a psychiatric hospital in Germany: geriatric psychiatry (GerP) and general psychiatry (GenP). Fifteen interviews were conducted with different occupational groups and analyzed in-depths. Routine hospital data were analyzed for delimiting the two contexts.

Routine hospital data show a higher day-mix index (1.08 vs. 0.94) in the GerP context and a very different structure regarding PPS groups, indicating a higher patient complexity. Two types of factors influencing implementation were identified: Context-independent factors included social separation between nurses and doctors, poor communication behavior between the groups and a lack of conveying information about the underlying principles of the PPS. Context-dependent factors included compatibility of the new requirements with existing routines and the relative advantage of the PPS, which were both perceived to be lower in the GerP context.

Depending on the patient characteristics in the specific context, compatibility with existing routines should be ensured when implementing. Clear communication of the underlying principles and reduction of organizational and communicative barriers between professional groups are crucial success factors for implementing such innovations.

This study shows how a diffusion process takes place in an organization even after the organization adopts an innovation. The authors could show how contextual differences in terms of patient characteristics result in different determinants of implementation from the views of the employees affected by the innovation.

The purpose of this study was to explore and interpret how frontline leaders define, experience and rationalise their approaches to the successful implementation of clinical guidelines in mental health care.

Employing an interpretative phenomenological design, the authors conducted and analysed individual interviews of frontline leaders at 14 psychiatric clinics involved in a national study of implementing evidence-based clinical guidelines in mental health.

The authors found a broad spectrum of attitudes and attributes, as well as a wide repertoire of strategies for frontline implementation leadership. Three main approaches were revealed, comprising “Curious and welcoming”, “Integrity and setting standards” and “Caring and collegial”.

The study present what experienced frontline leaders emphasise to enable implementation of guidelines, not empirical pieces of evidences for what they in fact do or if these actions lead to implementation. The generalisability to other settings is unknown. Another sample profile, context or organisational level may have impacted the result. The concreteness of the frontline leaders’ considerations, approaches and actions gives important knowledge about frontline leaders leadership across traditional leadership theories.

Existing leadership theories describe different leadership styles, while this study reveals the need for a wide range of approaches to balance the many needs and demands. The complexity of leadership approaches this study found is in line with implementation theories; thus, the present study incorporates implementation science into the leadership literature.

Duplex stainless steels have become important competitors to austenitic stainless steels in many applications and a great deal of attention has focused on the welding aspects. The introduction of modern grades with improved properties and a competitive price level have increased their use in the offshore, petrochemical and shipbuilding industries, for example. In particular the newer grades, with their higher nitrogen content and improved weldability, have moved duplex stainless steels from a position as “interesting” materials to one of “useful in practice”. However, duplex stainless steels differ from austenitic grades in some respects, and know‐how combined with the use of appropriate welding procedures and consumables is therefore the key to successful welding.

The effect of the addition of aggressive salts such as LiCl, NaCl, KCl, RbCl and MgCl2 on the steady‐state potential of a Zn electrode previously equilibrated in a passivating chromate solution is established. S‐shaped curves are obtained for the variation of the steady‐state potential with the quantity of aggressive salt added. For each inhibitor concentration, Cinh, the addition of aggressive ions up to a certain concentration has no effect on the passivity of Zn. However, higher Cl ion concentration causes destruction of the passive film and initiation of pitting corrosion. Destruction of passivity occurs after an induction period which decreases with the increase in the concentration of the attacking ion and/or the decrease in that of the inhibiting ions. The concentration of aggressive ion, Cagg, that can be tolerated by a certain concentration of the inhibiting ions, Cinh, is given by the relation : log Cinh =K + n log CCl−, where K and n are constants. The efficiency of these salts in initiating pitting corrosion increases in the order RbCl ≤ MgCl2, ≤ KCl < NaCl < LiCl. The change in the degree of aggressivity of these salts could be attributed either to the incorporation of the cations in the passive film or to their effect on pH.

To explore the mechanisms of the implementation strategy, “oilcloth sessions” and understand and explain the ripple effects of oilcloth sessions as a strategy to implement a new emergency department.

A qualitative design was used whereby data were collected using field notes from an ethnographic study of the oilcloth sessions and follow-up semi-structured interviews with staff, managers and key employees who participated in the oilcloth sessions. The data analysis was inspired by the realist evaluation approach of generative causality proposed by Pawson and Tilley.

The primary ripple effect was that the oilcloth sessions were used for different purposes than the proposed program theory, including being used as: (1) a stage, (2) a battlefield, (3) a space for imagination and (4) a strategic management tool influencing the implementation outcomes. The results bring essential knowledge that may help to explain why and how a well-defined implementation strategy has unplanned outcomes.

Unintended outcomes of implementation strategies are an underexplored issue. This study may help implementation researchers rethink the activities required to reduce unintended negative outcomes or explore potential unplanned outcomes and, in this way, hinder or enhance outcomes, effectiveness and sustainability. Future studies within implementation research should incorporate attention to unintended outcomes to fully understand the impact of implementation strategies.