Springer basic sets and modular Springer correspondence for classical types

We define the notion of basic set data for finite groups (building on the notion of basic set, but including an order on the irreducible characters as part of the structure), and we prove that the Springer correspondence provides basic set data for Weyl groups. Then we use this to determine explicitly the modular Springer correspondence for classical types (for representations in odd characteristic). In order to do so, we compare the order on bipartitions introduced by Dipper and James with the order induced by the Springer correspondence.Comment: 31 page

Decoupling and prices: determinant of dairy farmers’ choices? A model to analyse impacts of the 2003 CAP reform

The reform of European Common Agricultural Policy (CAP) in 2003 has resulted in substantial changes to the attribution of subsidies to dairy farmers. Moreover, dairy farmers are in also facing an unprecedented situation on the markets with the soaring prices of agricultural raw materials: they sell their products at a higher price (milk, meat and cereals), but must also cope with the increasing prices of concentrates. In this paper1, we discuss cross effects, on the productive strategy of French dairy farms, of the Luxemburg Agreement and the prices variations. A model based on mathematical programming has been privileged to determine how dairy farmers might re-evaluate their systems to identify optimal production plan. While respecting the principle of agent rationality (maximization of profit), the model incorporates the economic risk related to the volatility of the inputs and outputs prices. Thus the model maximises the expected utility of the income while taking into account a set of constraints: regulatory, structural, zootechnical, agronomic and environmental. The model is applied to four types of dairy farms to cope with the diversity of production systems in the west of France (“grazier” type, “semi intensive” type, “milk + cereals” type and “milk + young bulls” type). The model is used to produce quantitative estimations and support reflection through the simulation of the setting up of the Single payment scheme. The sensitivity of the results is discussed by taking into account several options of prices for cereals and livestock products. These may have a strong influence on the structure of the diet and, therefore, on the level of intensification of the forage area. The results show that the implementation of the CAP reform encourages farmers to substitute a part of corn silage by grass in the diet. However, the rising price of agricultural production encourages, on the contrary, farmers to intensify their system in order to free up land for growing cereals. We also observe that a decrease of the young bulls fattening activity to develop cereal crops is also economically profitable.dairy farm, single payment, price variation, Agricultural and Food Policy, Livestock Production/Industries,

Agri-food clusters: Does French policy match with real spatial dynamics?

In this paper, we attempt to ascertain to what extent the clusters identified in the agricultural and agri-food space rely on a spatial dynamic involving real agricultural and agri-food activities in the relevant geographic area. We use explanatory spatial data analysis (ESDA) to detect the spatial structure and dynamics of agri-food activities and to connect them to the competitiveness clusters’ locations. Results show that the six clusters specifically studied have different profiles because of their proximity to dynamic areas of agricultural and agri-food production and because of their collaborations with other clusters. Keywords: French Competitiveness Clusters, spatial analysis, inter cluster collaboration.

也有輪著寫的：張家山漢簡《筭數書》寫手與篇序初探

International audienceThis paper examines the bamboo manuscript Suan shu shu 筭數術 (Writings on Mathematical Procedures) from Zhangjiashan 張家山 tomb 247 (sealed ≥ 186 BCE) for evidence of multiple scribal hands. The Suan shu shu presents a particularly interesting case study in this regard in that it is one of the few manuscripts from this period to feature the signatures of 'checkers' (chou 讎), the three of which were presumably responsible for the quality of textual (re)production. Presenting our methodology, we explain how we distinguished two separate hands operative in the body and section headings of the manuscript. From there, we present the peculiar case of the section 'Shao guang' 少廣 (Reduced Width), where we see the two hands alternate back and forth between question and answer, leading us, in the conclusion, to suggest the possibility that this manuscript is a teaching document reflecting a master–disciple exchange

Trends in fertility by parity in Europe

In this work we review and assess current trends and differences in fertility in European countries, and also the USA and Canada, with a particular emphasis on birth by order. Fertility levels are estimated for 11 countries using FFS data. We use indicators known as the Period Parity Progression Ratios (P-PPRs). These offer a more detailed view of the family formation process than the traditional Total Fertility Rate (TFR). They also yield better estimates of period total fertility intensity, because these ratios are free of the effects of changes in mean age at childbearing and in the distribution of births by order that affect the TFR

Students Motivations For Voluntary Remedial Learning In High School

Most high schools offer remedial learning sessions to their students; however, very little is known about the perception of these activities, especially with regards to the students motivations. In order to gain insights into both topics, an exploratory study was conducted within a sample of 1388 high school students in the Province of Quebec (Canada). Participants were selected on the basis of their voluntary participation or non-participation in remedial learning sessions held at school. School motivation was measured with a questionnaire based on Deci and Ryans SDT (Self Determination Theory); perceptions were gathered and measured with open-ended and multiple choice items. Quantitative results indicated that participants of remedial learning sessions were more strongly motivated towards school. No significant relationships were found between attendance and grades, with similar proportions of high, average and below average participating and non-participating students; however, among participants, girls outnumbered boys by 2:1. Two main categories emerged from qualitative analyses: remedial learning can be seen as: a) an instrumental support linked to the subject matter; or b) a relational support which fosters better learning

The GOLD project - Drilling in the Western Mediterranean Sea

ECORD NEWSLETTER 16The "GOLD" IODP Project aims to recover the complete history of the Gulf of Lion (25-30 Ma) with a specific focus on Global Climate and Sea-level Changes, Extreme Events, Margin formation, Natural Resources and the Deep Biosphere using dedicated drilling Platform (MSP, Joides and Chikyu). It should be emphasized that no academic drillings dealing with pre-5million years exist in the Mediterranean Sea

Two siblings with the same severe form of 21-hydroxylase deficiency but different growth and menstrual cycle patterns

Congenital adrenal hyperplasia (CAH) is one of the most frequent autosomal recessive diseases in Europe. Treatment is a challenge for pediatric endocrinologists. Important parameters to judge the outcome are adult height and menstrual cycle. We report the follow-up from birth to adulthood of two Caucasian sisters with salt-wasting CAH due to the same mutation, homozygosity c.290-13A>G (I2 splice), in the 21-hydroxylase gene. Their adherence to treatment was excellent. Our objective was to distinguish the effects of treatment with hydrocortisone (HC) and fludrocortisone (FC) on final height (FH) from constitutional factors. The older girl (patient 1), who showed virilized genitalia Prader scale III-IV at birth, reached FH within familial target height at 18 years of age. Menarche occurred at the age of 15. Her menstrual cycles were always irregular. Total pubertal growth was normal (29 cm). She showed a growth pattern consistent with constitutional delay. The younger sister (patient 2) was born without masculinization of the genitalia after her mother was treated with dexamethasone starting in the fourth week of pregnancy. She reached FH at 16 years of age. Her adult height is slightly below familial target height. Menarche occurred at the age of 12.5, followed by regular menses. Total pubertal growth was normal (21 cm). The average dose of HC from birth to FH was 16.7 mg/m2 in patient 1 and 16.8 mg/m2 in patient 2. They received FC once a day in doses from 0.05 to 0.1 mg. Under such therapy, growth velocity was normal starting from the age of 2.5 years with an overall average of +0.2 SD in patient 1 and -0.1 SD in patient 2, androstenedione levels were always within normal age range. Similarly, BMI and blood pressure were always normal, no acne and no hirsutism ever appeared. In conclusion, two siblings with the same genetic form of 21-hydroxylase deficiency and excellent adherence to medication showed different growth and menstrual cycle patterns, rather related to constitutional factors than to underlying CAH. In addition, the second patient represents an example of successful in utero glucocorticoid treatment to prevent virilization of the external genitalia