Using the J1-J2 Quantum Spin Chain as an Adiabatic Quantum Data Bus

This paper investigates numerically a phenomenon which can be used to transport a single q-bit down a J1-J2 Heisenberg spin chain using a quantum adiabatic process. The motivation for investigating such processes comes from the idea that this method of transport could potentially be used as a means of sending data to various parts of a quantum computer made of artificial spins, and that this method could take advantage of the easily prepared ground state at the so called Majumdar-Ghosh point. We examine several annealing protocols for this process and find similar result for all of them. The annealing process works well up to a critical frustration threshold.Comment: 14 pages, 13 figures (2 added), revisions made to add citations and additional discussion at request of referee

Livelihood Vulnerability Index: An Approach to Assess Vulnerability of Crop Farmers to Climate Variability and Change in Ghana

Climate change has emerged as a global concern, especially its negative impacts on agriculture, particularly amongst poor subsistence and smallholder farmers because of the sector’s dependency on rainfall. The impacts of climate change and climate related extreme events may vary among farmers within the same locality based on the interplay of factors such as differences in households’ socio-demographic and economic characteristics. The extent of the impacts of climate change depends on the capacity of farmers and appropriateness of the adaptation measures undertaken to mitigate such impacts. This study adopts the Livelihood Vulnerability Index to assess the vulnerability of the two districts (Atwima Mponua and Ejura-Sekyeredumase) in different agro-ecological zones (Semi-Deciduous Forest and Transition Zone respectively). The study used household questionnaires to collect primary data from150 farming households from each district as well as using secondary data on rainfall and temperature from the Ghana Meteorological Agency. The Livelihood Vulnerability Index was used to assess the vulnerability of the two districts. The overall LVI indicates that Ejura-Sekyeredumase District may be more vulnerable to climate change impacts than Atwima Mponua District. The vulnerability triangle indicates that Ejura-Sekyeredumase District is more sensitive to climate change and variability impacts than Atwima Mponua District.  Although Atwima Mponua District may have a higher adaptive capacity than Ejura-Sekyeredumase District, the difference is relatively small. The study found that while it is important to have generic policies that address the main agricultural issues in Ghana, development and implementation of region-specific adaptation policy is crucially important. Keywords: Climate variability and change, Livelihood Vulnerability Index, exposure, sensitivity, adaptative capacity DOI: 10.7176/JEES/13-1-03 Publication date: January 31st 202

Food legume improvement and development : proceedings ...

Meeting: Regional Food Legume Improvement and Development Workshop, 1st, 2-7 May 1978, Aleppo, SYCompilation of workshop papers on legume food production in the Middle East and North Africa - discusses agrobioclimatology and cultivation systems, nutritional value and food composition; plant production (particularly chickpeas, lentils, and faba beans), agricultural research, cultivation practices for plant protection; plant diseases, insect pests, disease resistance, weed control problems (use of herbicides in arid zones); plant breeding and genetic improvement. IDRC mentioned, list of participants

Electroencephalographic assessment of concussive non-penetrative captive bolt stunning of turkeys

1. The aim of this study was to evaluate the electroencephalographic (EEG) and behavioural responses of turkeys stunned with three different concussive non-penetrative captive-bolt guns prior to slaughter. 2. A total of 31 slaughter weight ex-breeding female turkeys (29 weeks of age; mean body weight 13.32 ± SD 0.65 kg) were stunned with the Cash Poultry Killer (CPK) (n = 10), Turkey Euthanasia Device (TED) (n = 10) and Zephyr EXL (n = 11). 3. Mean peak kinetic energy was highest for the CPK compared to the TED and Zephyr EXL (75.9 ± 4.5, 28.4 ± 0.4 and 24.4 ± 0.7 J, respectively). 4. A total of 29 (94%) of the turkeys were rendered unconscious following captive bolt stunning, with total power of the EEG (Ptot) significantly reduced from baseline values (reductions of 67% CPK, 84% TED and 76% Zephyr EXL, p < 0.01) and waveforms becoming isoelectric after periods of transitional EEG. However, two birds shot with the CPK and Zephyr EXL had periods of behavioural/reflexes (rhythmic respiration, nictitating membrane reflex, neck tension) and EEG activity (43–47 and 36–60 + s after the shot, respectively) indicating incomplete concussion and return of consciousness. In one bird, the shot was incorrectly positioned (Zephyr EXL), while the other appeared to be related to a defective cartridge (CPK). 5. In conclusion, all three captive bolt gun models were effective in producing unconsciousness in turkeys, provided they were positioned correctly and power loads performed according to their specifications. KEYWORDS: Animal welfare, behaviour/brainstem reflexes, captive bolt, electroencephalogram (EEG), non-penetrative, stunning, turke

The capabilities approach and critical social policy: lessons from the majority world?

The capabilities approach (CA) most closely associated with the thinner and thicker versions of Sen and Nussbaum has the potential to provide a paradigm shift for critical social policy, encompassing but also transcending some of the limitations associated with the Marshallian social citizenship approach. The article argues, however, that it cannot simply be imported from the majority world, rather there is a need to bear in mind the critical literature that developed around it. This is generally discussed and then critically applied to case studies of CA in the developed capitalist world, particularly the Equalities Review conducted for the Equality and Human Rights Commission

Rates of agonism among female primates: a cross-taxon perspective

Agonism is common in group-living animals, shaping dominance relationships and ultimately impacting individual tness. Rates of agonism vary considerably among taxa, however, and explaining this variation has been central in ecological models of female social relationships in primates. Early iterations of these models posited a link to diet, with more frequent agonism predicted in frugivorous species due to the presumed greater contestability of fruits relative to other food types. Although some more recent studies have suggested that dietary categories may be poor predictors of contest competition among primates, to date there have been no broad, cross-taxa comparisons of rates of female–female agonism in relation to diet. This study tests whether dietary variables do indeed pre- dict rates of female agonism and further investigates the role of group size (i.e., number of competitors) and substrate use (i.e., degree of arboreality) on the frequency of agonism. Data from 44 wild, unprovisioned groups, including 3 strepsirhine species, 3 platyrrhines, 5 colobines, 10 cercopithecines, and 2 hominoids were analyzed using phylogenetically controlled and uncontrolled methods. Results indicate that diet does not predict agonistic rates, with trends actually being in the opposite direction than predicted for all taxa except cercopithecines. In contrast, agonistic rates are positively associated with group size and possibly degree of terrestriality. Competitor density and perhaps the risk of ghting, thus, appear more important than general diet in predicting agonism among female primates. We discuss the implications of these results for socio-ecological hypotheses

Achieving positive change for children? Reducing the length of child protection proceedings: lessons from England and Wales

Court decisions are required to remove children, compulsorily, from their families, and approve permanent care arrangements which restrict or terminate parents’ rights. The children involved are mostly young, have experienced serious abuse or neglect and may require permanent placement away from their parent(s) for their remaining childhoods. In England and Wales, justice to parents has dominated the rhetoric about these proceedings; this has resulted in lengthy proceedings, long periods of uncertainty for children and reduced placement options. In order to reduce delays, reforms in England and Wales have set a time limit for the completion of care proceedings. The Children and Families Act 2014 limits proceedings to 26 weeks; approximately 60% of care proceedings are now completed within this period. This article will discuss the impact of these reforms on decision-making for children, questioning whether they achieve both good decisions for children and justice for families. It uses the findings of an ESRC-funded study: ‘Establishing outcomes of care proceedings for children before and after care proceedings reform (2015–2018)’