Implications for welfare, productivity and sustainability of the variation in reported levels of mortality for laying hen flocks kept in different housing systems: A meta-analysis of ten studies

Data from ten sources comprising 3,851 flocks were modelled to identify variation in levels of mortality in laying hens. The predicted increase with age was curvilinear with significant variation between the seven breed categories. Mortality was higher in loose housing systems than in cages and variable within system, confirming previous reports. Cumulative mortality (CM) was higher in flocks with intact beaks (χ2 = 6.03; df 1; p = 0.014) than in those with trimmed beaks. Most data were available for free-range systems (2,823 flocks), where producer recorded CM at 60–80 weeks of age averaged 10% but with a range from 0% to 69.3%. Life cycle assessment showed that the main effect of increased levels of hen mortality is to increase the relative contribution of breeding overheads, so increasing environmental burdens per unit of production. Reducing CM to levels currently achieved by the 1st quartile could reduce flock greenhouse gas emissions by as much as 25%. Concurrently this would enhance hen welfare and better meet the expectation of egg consumers. More research to understand the genetic x environment interaction and detailed records of the causes of mortality is required so that improved genotypes can be developed for different systems and different breeds can be better managed within systems

Energy harvesting from vibrations with a nonlinear oscillator

In this paper we present a nonlinear electromagnetic energy harvesting device that has a broadly resonant response. The nonlinearity is generated by a particular arrangement of magnets in conjunction with an iron-cored stator. We show the resonant response of the system to both pure-tone excitation and narrow-band random excitation. In addition to the primary resonance, the super-harmonic resonances of the harvester are also investigated and we show that the corresponding mechanical up-conversion of the excitation frequency may be useful for energy harvesting. The harvester is modeled using a Duffing-type equation and the results compared to the experimental data.</jats:p

SUSY sine-Gordon theory as a perturbed conformal field theory and finite size effects

We consider SUSY sine-Gordon theory in the framework of perturbed conformal field theory. Using an argument from Zamolodchikov, we obtain the vacuum structure and the kink adjacency diagram of the theory, which is cross-checked against the exact S-matrix prediction, first-order perturbed conformal field theory (PCFT), the NLIE method and truncated conformal space approach. We provide evidence for consistency between the usual Lagrangian description and PCFT on the one hand, and between PCFT, NLIE and a massgap formula conjectured by Baseilhac and Fateev, on the other. In addition, we extend the NLIE description to all the vacua of the theory. (C) 2003 Elsevier B.V. All rights reserved

Girl-Next-Door to Girlboss: Taylor Swift’s Online Evolution from Puerile Pop Star to Poignant Political Influence

Of all society’s public figures, the social-media-savvy celebrity is arguably the most powerful. Singer-songwriter Taylor Swift has amassed one of the largest followings on the internet. In recent years, she has inspired fans to act upon sociopolitical issues via voter registration, letter-writing campaigns, and music. Her digital footprint is not without contention from a slow arrival to politics to white feminist attributes present in her messaging. Through close reading across four social media platforms, I found a shift in Swift’s social media activity. In her transition from a young pop star to a global influence, I concluded that “Swifties” will follow her lead and create real change

Teachers developing assessment for learning: impact on student achievement

While it is generally acknowledged that increased use of formative assessment (or assessment for learning) leads to higher quality learning, it is often claimed that the pressure in schools to improve the results achieved by students in externally-set tests and examinations precludes its use. This paper reports on the achievement of secondary school students who worked in classrooms where teachers made time to develop formative assessment strategies. A total of 24 teachers (2 science and 2 mathematics teachers, in each of six schools in two LEAs) were supported over a six-month period in exploring and planning their approach to formative assessment, and then, beginning in September 1999, the teachers put these plans into action with selected classes. In order to compute effect sizes, a measure of prior attainment and at least one comparison group was established for each class (typically either an equivalent class taught in the previous year by the same teacher, or a parallel class taught by another teacher). The mean effect size was 0.32

REGIONAL DIFFERENCES IN THE CONTRIBUTION OF OFF-FARM WORK TO INCOME INEQUALITY

This paper uses the concept of the Gini Coefficient and data from the 1991 Farm Costs and Returns Survey (FCRS) to measure the role of off-farm income and that of other income sources in the size distribution of farm operator households' total personal income. Disaggregated FCRS data by region and by level of participation in off-farm employment show that nonparticipating farm operator households have, as a group, higher income inequality than participating households. The results also indicate that, irrespective of the off-farm work status of the farm operator household, the distribution of income among households in the North Central region is least unequal and that in the West is most unequal.Labor and Human Capital,

Laying Down the Foundations for International Student Journey. Students as Academic Partners Project Report.

The aim of this project was to explore the lived experiences of being an international student studying at a University within the UK and to make recommendations for future provision. There are increasing numbers of international students studying at Universities within the UK. Positive learning environments and arrangements are the responsibility of the host University and international students’ needs should be taken into consideration. This project was led by international students in collaboration with academic staff. It involved a qualitative exploration of international student perspectives and their experiences of studying within the UK. Ten international students completed a questionnaire that was designed by international students. Respondents were asked questions in relation to three areas: coming to the UK, arriving in the UK and studying in the UK

Pyrrhic Victories: The Mirage of Winning at the Supreme Court

We conduct in-depth archival research of landmark constitutional criminal procedure cases and find two ways in which the declarations of the vindication of rights they contain are misleading. First, most defendants who successfully establish police violations of their constitutional rights before the highest court in the land nonetheless remain in prison for years or decades subsequently. The multitude of ways in which the state can convict the individual defendant even in the face of one or more constitutional violations means that the Supreme Court precedents that bear their names seldom translate to genuine wins for the defendants. Second, there are often overwhelming hurdles to finding out what happened, even for legal experts and even in landmark cases—suggesting that holding the state accountable in ordinary cases and for ordinary people must be close to impossible. Transcripts are unavailable, individual official discretion determines if files are accessible, files are missing, extraordinarily high fees apply even where transcripts are available, and there are numerous other sometimes insurmountable barriers to researching these topics. The fact that even those who win landmark criminal procedure cases typically remain in prison has significant doctrinal implications. The modern Supreme Court weighs “costs to society” in assessing whether to apply the exclusionary rule or Miranda protections, but our findings mean that these costs are less than they appear. Further, we argue that this opaque informational legal ecosystem masks the power of prosecutors and prevents accountability and transparency, hampering the rule of law. Accordingly, this Article has implications for specific doctrines as well as the orientation of the criminal justice system more generally