Search results

TITANIUM, in common with the other industrial structural metals, can be alloyed to improve property levels to match the design requirements of a variety of chosen applications. Unlike copper and iron and other traditional metals however the alloys of titanium are less the discoveries of chance than products of deliberate development based on alloy theory. Commercially pure titanium, 99% plus Ti, at room temperature has a hexagonal (CPH) crystal lattice alpha phase. This transforms to beta phase centred cubic (BCC) lattice at approx 900°C. Titanium alloys are based on stabilisation of one or other of the two phases or the precipitation of compounds within either lattice. Alloys built around the CPH phase are denoted alpha alloys those around the BCC as beta alloys and those which feature both phases in equilibrium at room temperature are alpha‐beta alloys. Interestingly, relatively few of the formulations first developed have survived the test of time. Alloys which in the laboratory looked extremely promising proved too difficult to melt or process in volume, intractable in forging or machining and fell short of their expectations in final application. The one alloy which has so far withstood all challenges to its supremacy in the widest range of applications within the aerospace industry is the alpha‐beta formulation Ti‐6A1–4V. This alloy frequently described as the “work horse” of the titanium industry is available in all semi finished forms and has carried for some 30 years the burden of introducing titanium as a light strong reliable competitive structural metal in aerospace applications.

This paper presents the major findings from the project “Development of new methods for evaluation of library Web sites on the World Wide Web”. The report includes a brief examination and discussion of quality applied to Web sites in general and concerning library Web sites in particular. Findings from a few empirical surveys are presented. A new list of quality criteria for evaluation of academic libraries is compiled. The list is tested on three Danish academic libraries. Finally, a revised list of criteria is applied to twelve major Danish academic libraries. The findings include the panellists’ scores and their verbal comments. The main conclusion is that the Web sites of the Danish academic libraries in question are above average compared with Web sites in general. They do not, however, come up to expectations as virtual expressions of the quality levels of the libraries. This situation can only be improved if the libraries allocate the necessary resources regarding updating and development of the Web sites. This should be done on the basis of regular user studies and comparative evaluations.

Climate change means that buildings must greatly reduce their energy consumption. It is however paradoxical that climate mitigation in Denmark has created negative energy and indoor climate problems in housing that may be made worse by climate change. A literature review has been carried out of housing schemes where climate mitigation was sought through reduced space heating demand, and it is shown that extensive problems with overheating exist. A theoretical study of regulative and design strategies for climate mitigation in new build housing has therefore been carried out, and it is shown that reducing space heating with high levels of thermal insulation and passive solar energy results in overheating and a growing demand for cooling.

Climate change is expected to reduce space heating and increase cooling demand in housing. An analysis of new build housing using passive solar energy as a climate mitigation strategy has therefore been carried out in relation to future climate change scenarios. It is shown that severe indoor comfort problems can occur, questioning the relevance of passive solar energy as a climate mitigation strategy. In conclusion, a theoretical study of the interplay between climate adaptation and mitigation strategies is carried out, with a cross-disciplinary focus on users, passive design and active technologies. It is shown that the cumulative use of these strategies can create an adaptation buffer, thus eliminating problems with overheating and reducing energy consumption. New build housing should therefore be designed in relation to both current and future climate scenarios to show that the climate mitigation strategies ensure climate adaptation.

Nitrous oxide (N₂O) use for recreational purposes appears to have increased among young people in several countries, including Denmark, Australia, The Netherlands and the UK. This increase has prompted concern among health authorities and politicians. The purpose of this paper is to map out findings in the available literature about N₂O use among young people to better understand current trends and contextualize the public concerns and the new policy responses to it.

The authors draw here on a range of sources, including research literature, reports and policy documents in English and Danish. Given the broad aim, the authors used a scoping study approach (Arksey and O’Malley, 2005).

The authors found literature on prevalence of use, health effects and policy regulations. The literature suggests that health harms associated with N₂O use are generally associated with intensive and long-term use, and death is more likely where the means of administration entails a risk of suffocation. Overall, however, the analysis shows that substantial gaps exist in the available literature. The authors lack detailed knowledge on several issues, including comparable prevalence data of N₂O use; the extent to which N₂O is used with other drugs; how one can distinguish between harmful and non-harmful use in terms of both quantity inhaled and mode of administration; and on intended and unintended consequences of policy responses to this use.

The current increase and trend in inhaling N₂O for intoxication among young people is under researched. This general review maps out what kind of knowledge would be valuable to have for prevention, harm reduction and policy interventions.

Rabbit syndrome (RS) is an antipsychoticinduced rhythmic motion of the mouth/lips resembling the chewing movements of a rabbit. The movement consists of a vertical-only motion, at about 5 Hz, with no involvement of the tongue. Long-term exposure to typical antipsychotics has clearly been associated with RS, but little is known of the risk of RS due to exposure to newer atypical antipsychotics. There have been isolated reports of RS in patients treated with the atypical agents risperidone, aripiprazole, olanzapine, and clozapine. We present the case history of a 44-year old female patient treated for paranoid schizophrenia for 22 years and RS during her last 10-month clozapine treatment. Background information from the literature is also discussed.

Presents a description of the implementation of a supplier source integration (SSI) program at a large manufacturing company, and the challenges faced in the pursuit of new processes, methodologies and techniques. Discusses issues pertaining to the management of interfaces with the supplier over the entire product development life cycle. There is particular focus on the choice of the supplier and overcoming problems arising from the in‐house design team. Previous experiences of the company with SSI have given the current design team a number of positive and negative results together with a set of recommendations that can be used in the current implementation of SSI for an exhaust system. These can also provide the basis for determining a future strategy.

The purpose of this paper is to provide a sector-based analysis of the drivers for social entrepreneurship in the agricultural sector.

The paper uses qualitative data from two studies in the Danish region of Northern Jutland. The data include responses from 38 farmers who offered or had considered offering social services. The analytical framework is taken from a review of the limited literature on Green Care and Social Farming and social entrepreneurship theory.

Strong and consistent tools for the categorisation of farmers’ social entrepreneurship have been developed. However, these tools have merely been used descriptively rather than to create proactive agriculture policies to facilitate social entrepreneurship. In Region Northern Jutland social entrepreneurship in farming is driven by a combination of tradition, close relationships and coincidence. It is ad hoc, with each initiative starting from scratch because no knowledge or experience has been gathered or distributed.

The agricultural sector-based approach to social entrepreneurship will not be discussed against other approaches to social entrepreneurship. This would be a suggestion for another more conceptual kind of article in the future.

A study of social entrepreneurship among farmers has not yet been coupled with a sector-based analytical framework. This paper contributes to the literature of social entrepreneurship by supplementing with an agricultural sector-based approach.

To the Most Rev. M.A. Corrigan, Archbishop of New York: