An experimental investigation into the constant velocity water entry of wedge-shaped sections

Constant velocity water entry is important in understanding planing and slamming of marine vessels. A test rig has been developed that drives a wedge section with end plates down guides to enter the water vertically at near constant velocity. Entry force and velocity are measured. Analysis of the test data shows that the wetting factor is about 1.6 at low deadrise angles and reduces nearly linearly to 1.3 at 451 deadrise angle. The added mass increases quadratically with immersed depth until the chines become wetted. It then continues to increase at a reducing rate, reaching a maximum value between 20% and 80% greater than at chine immersion. The flow momentum drag coefficient is estimated from the results to be 0.78 at 51 deadrise angle reducing to 0.41 at 451 deadrise angles. Constant velocity exit tests show that the momentum of the added mass is expended in driving the water above the surface level and that exit forces are low and equivalent to a drag coefficient of about 1.0-1.3. Considerable dynamic noise limits the accuracy of the results, particularly after chine immersion

Ageing and Pension Reform in a Small Open Economy: The Role of Savings Incentives

In this paper we analyse the effects of ageing in a small open economy with a representative government. More specific, we adress the question whether in case of ageing a transition from an unfunded to a more funded pension scheme is politically feasible. We show that the existence of a suitable subsidy on savings is crucial in this respect. Without a subsidy on savings, the economy is trapped at the preexisting level of saving and ageing leads to an increase of the PAYG tax. However, if a subsidy exists which is linked to the tax rate in a non-linear way a conversion from PAYG to funded pensions is politically feasible.ageing;overlapping generations;pensions

Progress in building an International Lattice Data Grid

We report on progress in setting up the International Lattice Data Grid. We describe the aims and objectives of the ILDG, what has been achieved during its first year of activity and invite feedback from the community.Comment: Lattice2003(activity), 5 pages 2 figures. Edinburgh address correcte

Everything you always wanted to know about data for the Cultural and Creative Sector production system, but were afraid to ask: Part 1 – Problems of statistical description

This CICERONE paper (D4.2) addresses the problem of the lack of data available to describe the Cultural and Creative Sector (CCS) production system. It explains how and why the currently available data is insufficient in its depth, and breadth of coverage, leading to an appreciation of which activities are made visible, and which are obscured or hidden, by such measures. This paper is the first step in proposing what a sufficient taxonomy would look like: a suitable framework of new data collection related to the CCS production system, which we set out in more detail a following (and linked) paper (D4.3, entitled Everything you always wanted to know about data for the Cultural and Creative Sector production system, but were afraid to ask: Part 2 – Assembling disparate data sources). The purpose of this paper is hence to describe the intersection between definitions, and their operationalisation in taxonomies and actual data collection. It is split into two parts. The first articulates the implications of a ‘Romantic’ definition of culture that has been used previously with an industrial taxonomy: arguably both notions have been failed. We then describe various attempts to conceptualise and mobilise taxonomies that bridge this divide and, in so doing, articulate their limitations. Part two of the paper is more analytic, describing these limitations using the concept of a matrix. The paper advocates a new data matrix – a radical realignment of concepts and industry taxonomies – to be developed more fully in the following and linked paper (D4.3). This matrix is, in effect, the conceptual and practical foundation of a Cultural Economy Observatory that is built as part of the CICERONE project

Effects of alcohol on subjective ratings of prospective and everyday memory deficits

Background: Research has shown that heavy alcohol use has a detrimental effect on retrospective memory. Less is known about the effect of alcohol on everyday memory. Methods: This study examined self-ratings of two aspects of memory performance: prospective memory (for example, forgetting to pass on a message) and everyday memory (measured by cognitive failures, such as telling someone a joke that you have told them before). To ensure anonymity and expand on the numbers of participants used in previous studies, data were collected by using the Internet. Data from 763 participants remained after data screening. Results: After controlling for other drug and strategy use, there was clear evidence that differential use of alcohol was associated with impairments in the long-term aspect of prospective memory and with an increased number of cognitive failures. Conclusions: These results support and extend the findings of previous research: our findings are consistent with the idea that heavy use of alcohol does have a significant and negative effect on everyday cognitive performance. Possible causes of these impairments are discussed

Everything you always wanted to know about data for the Cultural and Creative Sector production system, but were afraid to ask: Part 2 – Assembling disparate data resources, and preparations for reporting them

This CICERONE paper (D4.3) is part of series addressing the problem of the lack of data available to describe the Cultural and Creative Sector (CCS) production system. This series explains how and why the currently available data is insufficient in its depth, and breadth of coverage, leading to an appreciation of which activities are made visible, and which are obscured or hidden, by such measures. In the first paper of this series (D4.2), entitled Everything you always wanted to know about data for the Cultural and Creative Sector production system, but were afraid to ask: Part 1 – Problems of statistical description, a first step is taken in proposing what a sufficient taxonomy would look like: a suitable framework of new data collection related to the CCS production system. In this paper, we set out this framework in more detail a following. The purpose of D4.2 was to describe the intersection between definitions, and their operationalisation in taxonomies and actual data collection. It articulates the implications of a ‘Romantic’ definition of culture that has been used previously with an industrial taxonomy: arguably both notions have been failed. It then describe various attempts to conceptualise and mobilise taxonomies that bridge this divide and, in so doing, articulate their limitations. In this paper (D4.3), we advocate a new data matrix – a radical realignment of concepts and industry taxonomies. This matrix is, in effect, the conceptual and practical foundation of a Cultural Economy Observatory that is built as part of the CICERONE project

Family Size, Looming Demographic Changes and the Efficiency of Social Security Reform

This paper analyses the eeffects of ageing and child support in a model with endogenous fertility and Pay-As-You-Go (PAYG) pensions. First, we show that the endogeneity of fertility makes society vulnerable to both pessimistic beliefs and changes in life expectancy. In particular, we show that the private fertility choice may not coincide with the social optimum, due to the existence of two external effects of a child on society as a whole. The market outcome without government intervention is efficient, however, as both externalities exactly cancel out in that case. If the government wants to redistribute towards the old, it cannot replicate the command optimum by merely applying lump-sum transfers, but rather needs a child allowance scheme to effectively alter the number of offspring chosen by households. Finally, we analyse whether a Pareto-improving social security reform is possible. It is shown that a mere reduction of the PAYG-scheme cannot be Pareto-improving, but a combined policy of decreasing the PAYG-tax and introducing child allowances can be.child allowances;ageing;pensions;endogenous fertility;rumours;overlapping generations;social security reform

Self-rated everyday prospective memory abilities of cigarette smokers and non-smokers: a web based study

The present study examined self-ratings of two aspects of everyday memory performance: long-term prospective memory—measured by the prospective memory questionnaire (PMQ), and everyday memory—measured by the everyday memory questionnaire (EMQ). Use of other substances was also measured and used as covariates in the study. To ensure confidentiality and to expand the numbers used in previous studies, an Internet study was carried out and data from 763 participants was gathered. After controlling for other drug use and strategy use, the data from the PMQ revealed that smokers reported a greater number of long-term prospective memory errors than non-smokers. There were also differences between light and heavier smokers in long-term prospective memory, suggesting that nicotine may have a dose-dependent impact upon long-term prospective memory performance. There was also a significant ANOVA group effect on the EMQ, although the trend for more memory errors amongst the heavier smokers was statistically only borderline (p = .057). These findings suggest there are selective memory deficits associated with smoking and that long-term prospective memory deficits should be added to the growing list of problems associated with cigarette use