alpha-type Chevalley-Eilenberg cohomology of Hom-Lie algebras and bialgebras

The purpose of this paper is to define an $\alpha$-type cohomology, which we call $\alpha$-type Chevalley-Eilenberg cohomology, for Hom-Lie algebras. We relate it to the known Chevalley-Eilenberg cohomology and provide explicit computations for some examples. Moreover, using this cohomology we study formal deformations of Hom-Lie algebras, where the bracket as well as the structure map $\alpha$ are deformed. Furthermore, we provide a generalization of the Grand Crochet and study, in a particular case, the $\alpha$-type cohomology for Hom-Lie bialgebras

Spectrum-line reversal measurements of free electron and coupled N2 vibrational temperature in expansion flows

Spectrum line reversal measurements of free electron and coupled nitrogen vibrational temperatures in expansion flow of shock tub

Marginal Farmers and Agri-Environmental Schemes: Evaluating Policy Design Adequacy for the Environmental Fallow Measure

This paper examines the factors affecting farmer's participation in an agri-environmental scheme (AES) in marginal areas implying few changes in the traditional farm management (environmental fallow). The enrolment theoretical micro-economic model reveals that farmers` (extrinsic) factors as well as decision maker's (intrinsic) factors are important for farmer's participation, without disregarding the role of social capital. The farm and farmer characteristics (intrinsic factors) as well as the influence of the social capital have been tested trough the specification and estimation of an adoption model for dry-land marginal farmers in Granada (southern Spain). 300 farmers with cereal dry-land specialization have been surveyed in order to identify factors influencing their enrolment decision and to derive scheme design modifications to improve the AES success, understood as participation rate. Due to the fact that the effects of applying this measure do not have significant effect on the food and animal production, the participation decision is hypothesized to be mainly driven by the farmer's attitude reflecting the importance of the social capital in order to educate farmers. Nevertheless, AES interaction with other agricultural policies, such as LFA compensatory payments, restraints the possibility of this scheme's success specially when these payments imply greater financial resources. Further research is needed to see whether this same pattern holds when considering AES implying a more intensive change in the farm management.Agri-environmental policy, participation, marginal areas, policy design, Environmental Economics and Policy,

When more is less: the effect of multiple health and nutritional labels in food product choice

Consumers are facing increasing information on health and nutritional aspects of foods, an important source of which is that presented in food packages. Prior research has identified that this information is positively valued, but the effect of multiple information items simultaneously is not so well understood. A choice experiment has been conducted to identify the effect of multiple health and nutrition information sources in two products which represent both a healthy and less-healthy food (pork Frankfurt sausages and plain yoghurt respectively). Results show that although highly heterogeneous, preferences seem to positively value individual information items and negatively value the presence of more than one item, specially if the item is a health claim. Premiums consumers are willing to pay represent a significant percentage of retail price, specially for the less healthy food product which also faces lower retails prices.Nutritional information, nutritional claims, health claims, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety,

Re-considering Agri-Environmental Schemes premiums: the impact of fixed costs in sign-up decisions

Current EU legislation states that premiums for agri-environmental schemes must be calculated based on forgone profit and additional costs. This approach has been implemented for the last decades without much success in farmer uptake, a situation that might even worsen as the 20% additional payment as incentive for participation has been excluded in the new EU Rural Development Framework 2007-2013. This paper tries to explain why supply side estimated premiums might not suffice to assure farm profitability investigating the role that fixed costs have on adoption. A farm profit maximizing model is proposed where fixed and transaction costs are split from variations in marginal profit. This model is then developed to identify the potential barriers to adoption associated with the presence of fixed compliance costs. A sample of farmers eligible for an agri-environmental scheme entailing a land-use change is used to test whether the theoretical models are valid for explaining adoption decisions. Two different econometric specifications are used to identify the role of fixed costs, one assuming that uptake and surface decisions are governed by the same variables and another distinguishing both decisions. Estimation results show that there is an adoption barrier derived from the initial farm technical assets and know-how affecting the fixed compliance costs of introducing the new crop. Therefore not compensating for fixed costs can curtail agri-environmental policy success. In addition, there is an adoption barrier derived from transaction costs which are reduced in the presence of social networks.Agri-environmental schemes, fixed costs, adoption, Environmental Economics and Policy,

Propaganda and the people: an examination of persuasion in the struggle for independence in Việt Nam to 1954

Over the years 1946 to 1954, the Vietnamese people largely succeeded in repelling a European invader, the French colons, who fought to re-establish a French colony in that land. The Vietnamese fight was led by an indigenous organisation called the Viet Minh, an alliance of a number of groups, chief among them being the Indochinese Communist Party, which succeeded in carrying the bulk of the Vietnamese people along with them. One reason why they were able to do this was the success of the materials of persuasion, the propaganda, that they used. It was aimed squarely at the ordinary people, and successfully convinced millions of them to risk their lives and livelihood to help the fight for Independence. The persuasion techniques elicited a strong response because they were cleverly targeted and designed to appeal to traditions that the people felt connect to them and their daily aspirations. The personality and character of one man, President Ho Chi Minh, was crucial to the appeal for support from the ordinary Vietnamese citizen but, perhaps surprisingly, he is not at all a major figure in the propaganda materials

Breakdown of Burton-Prim-Slichter approach and lateral solute segregation in radially converging flows

A theoretical study is presented of the effect of a radially converging melt flow, which is directed away from the solidification front, on the radial solute segregation in simple solidification models. We show that the classical Burton-Prim-Slichter (BPS) solution describing the effect of a diverging flow on the solute incorporation into the solidifying material breaks down for the flows converging along the solidification front. The breakdown is caused by a divergence of the integral defining the effective boundary layer thickness which is the basic concept of the BPS theory. Although such a divergence can formally be avoided by restricting the axial extension of the melt to a layer of finite height, radially uniform solute distributions are possible only for weak melt flows with an axial velocity away from the solidification front comparable to the growth rate. There is a critical melt velocity for each growth rate at which the solution passes through a singularity and becomes physically inconsistent for stronger melt flows. To resolve these inconsistencies we consider a solidification front presented by a disk of finite radius $R_0$ subject to a strong converging melt flow and obtain an analytic solution showing that the radial solute concentration depends on the radius $r$ as $\sim\ln^{1/3}(R_0/r)$ and $\sim\ln(R_0/r)$ close to the rim and at large distances from it. The logarithmic increase of concentration is limited in the vicinity of the symmetry axis by the diffusion becoming effective at a distance comparable to the characteristic thickness of the solute boundary layer. The converging flow causes a solute pile-up forming a logarithmic concentration peak at the symmetry axis which might be an undesirable feature for crystal growth processes.Comment: 15 pages, 5 figure

Consumers’ willingness to pay for biodiesel in Spain

Consumer/Household Economics, Resource /Energy Economics and Policy,

IDENTIFYING CONSUMER VALUATION PATTERNS OF ALTERNATIVE NUTRITION AND HEALTH LABELS COMBINATIONS: EVIDENCE FROM SPAIN

The provision of nutrition and health information on food labels is increasing as an industry and regulation answer to the growing consumer concern with diet-health relationships. Prior research has shown that the presence of this information on food labels is valued by consumers; however there is still no clear pattern on which labelling options are more valued and how different consumers value the different options. This paper analyses the results of a choice experiment conducted to identify the effect of multiple health and nutrition information sources on consumer food choice, taking into account preference heterogeneity using a latent class approach. Results show that different consumer groups can be identified with clearly distinguishable valuation and behavioural patterns. A minority of consumers attaches high WTP to the provision of additional information in the nutrition facts panel, however this is not show for a vast majority who value claims. Moreover, not taking into account this preference heterogeneity can lead to policies that do not maximize consumer welfare. Based on the characteristics of consumers identified in each group, recommendations are made as to how both industry and public administration can move forward with the development of nutritional labelling guidelines or policies.Nutrition facts panel, latent class, choice experiments, consumer, interactions, health claims, nutrition claims, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Health Economics and Policy,