Comparison of ILC Fast Beam-Beam Feedback Performance in the e−e−e^- e^- and e+e−e^+ e^- Modes of Operation

Several feedback loops are required in the Beam Delivery System (BDS) of the International Linear Collider (ILC) to preserve the luminosity in the presence of dynamic imperfections. Realistic simulations have been carried out to study the performance of the beam-beam deflection based fast feedback system, for both e+e- and e-e- modes of operation. The beam-beam effects in the e-e- collisions make both the luminosity and the deflections more sensitive to offsets at the interaction point (IP) than in the case of the e+e-collisions. This reduces the performance of the feedback system in comparison to the standard e+e- collisions, and may require a different beam parameter optimization

Beam Halo Measurements using Wire Scanners at ATF2

Work supported by Chinese Scholarship Council, FPA2010-21456-C02-01 and i-link 0704 - http://accelconf.web.cern.ch/AccelConf/IPAC2014/papers/thpme091.pdfInternational audienceBeam halo hitting on the beam pipe after the Interaction Point (IP) can generate a large amount of background for the measurements of the nano meter beam size using the laser interferometer beam size monitor (Shintake monitor) at ATF2. In order to investigate the beam halo transverse distribution, a diamond detector will be installed downstream of the IP. A feasibility study of a transverse halo collimation system to reduce the background for these measurements is also in progress. Prior to the diamond detector installation, a first attempt of beam halo measurements have been performed in 2013 using the currently installed wire scanners. Modeling of the beam halo distribution in the extraction (EXT) line was done and compared with the old modeling for ATF. Beam halo measurements were also done using the post-IP wire scanner to investigate the beam halo distribution at post- IP

Exploring the contribution of alternative food networks to food security. A comparative analysis

[EN] Food (in)security has become a challenge not only for developing economies but also for High Income Countries. In parallel, food scholars have actively investigated the contribution of alternative food networks (AFNs) to the development of more sustainable and just food systems, paying attention to drivers, initiatives and policies supporting the development of alternatives to the dominant industrialised food system and its detrimental environmental and socio-economic impacts. However, few studies have directly addressed the contribution of AFNs to food security in the Global North. This paper aims to establish new linkages between food security debates and critical AFNs literature. For that purpose, we conduct a place-based approach to food security in a comparative analysis of initiatives of three different European contexts: Cardiff city-region (UK), the Flemish Region (Belgium) and the peri-urban area of the city of Valencia (Spain). The results unfold: i) how AFNs weave a more localised socio-economic fabric that creates new relationships between food security outcomes and specific territories, ii) hybridization processes within alternative but also conventional systems and iii) the role of advocacy and collective action at different levels. The analysis allows identification of key elements on which food security debates hinge and provides new insights to ground conceptual discussions on territorial and place-based food security approaches.This research is part of the project "Assessment of the impact of global drivers of change on Europe's food security" (TRANSMANGO), granted by the EU under 7th Framework Programme; theme KBBE.2013.2.5-01; Grant agreement no: 613532. Dr. Ana Moragues-Faus also acknowledges the funding of the European Commission and the Welsh Government that currently supports her Ser Cymru fellowship. These results reflect only the authors' view; the funders are not liable for any use that may be made of the information contained therein.Cerrada-Serra, P.; Moragues-Faus, A.; Zwart, TA.; Adlerova, B.; Ortiz-Miranda, D.; Avermaete, T. (2018). Exploring the contribution of alternative food networks to food security. A comparative analysis. Food Security. 10(6):1371-1388. https://doi.org/10.1007/s12571-018-0860-xS13711388106Arcuri, S., Brunori, G., & Galli, F. (2017). Insights on the role of private and public actors in food assistance provision: A literature review for high income countries. Economia agro-alimentare. https://doi.org/10.3280/ECAG2017-001006 .Barca, F., McCann, P., & Rodríguez-Pose, A. (2012). The case for regional development intervetion: Place-based versus place-neutral approaches. Journal of Regional Science, 52, 134–152. https://doi.org/10.1111/j.1467-9787.2011.00756.x .Bauler, T., Mutombo, E., van Gameren, V., Crivits, M., Paredis, E., Boulanger, P., . . . 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Proposal for Single-Bunch Collimator Wakefield Measurements at SLAC ESTB

Collimator wakefields in the Beam Delivery System (BDS) of future linear colliders, such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC), can be an important source of emittance growth and beam jitter amplification, consequently degrading the luminosity. Therefore, a better understanding of collimator wakefield effects is essential to optimise the collimation systems of future linear colliders in order to minimise wakefield effects. In the past, measurements of single-bunch collimator wakefields have been carried out at SLAC with the aim of benchmarking theory, numerical calculations and experiments. Those studies revealed some discrepancies between the measurements and the theoretical models. New experimental tests using available beam test facilities, such as the End Station A Test Beam (ESTB) at SLAC, would help to improve our understanding on collimator wakefields. ESTB will provide the perfect test bed to investigate collimator wakefields for different bunch length conditions, relevant for both ILC (300 micrometers nominal bunch length) and CLIC (44 micrometers nominal bunch length) studies. Here we propose to perform new experimental tests of collimator wakefield effects on electron/positron beams at SLAC ESTB.Comment: 22 pages, 19 figure

A Global Community of Courts? Modelling the Use of Persuasive Authority as a Complex Network

There is a growing discussion in the legal literature of an emerging global community of courts composed of a network of increasing judicial dialogue across national borders. We investigate the use of foreign persuasive authority in common law countries by analyzing the network of citations to case law in a corpus of over 1.5 million judgments given by the senior courts of twenty-six common law countries. Our corpus of judgments is derived from data available in the vLex Justis database. In this paper we aim to quantify the flow of jurisprudence across the countries in our corpus and to explore the factors that may influence a judge’s selection of foreign jurisprudence. Utilization of foreign case law varies across the countries in our data, with the courts of some countries presenting higher engagement with foreign jurisprudence than others. Our analysis shows that there has been an upward trend in the use of foreign case law over time, with a marked increase in citations across national borders from the 1990s onward, potentially indicating that increased digital access to foreign judgments has served to facilitate and promote comparative analysis. Not only has the use of foreign case law generally increased over time, the factors that may influence the selection of case law have also evolved, with judges gradually casting their research beyond the most influential and well-known foreign authorities. Notwithstanding that judgments emanating from the United Kingdom (chiefly from the courts of England and Wales) constitute the most frequently consulted body of jurisprudence, we find evidence that domestic courts favor citing the case law of countries that are geographically proximal

Tratamiento farmacológico de la obesidad

The treatrnent of the obesity will be based always in two fundamentals points: diet, and exercise. Although, in sorne cases it could be indicated an aditional pharmacologic treatment. Possibles treatments depending of the actuation place, according to the same scheme that food follows in the organism, have been revised. This is: intake, absorption, metabolism and excretion. In this way, the anorexigenics which act on the intake are revised; the different kind of fibres and inhibitors which act in the absorption; and in drugs which act on the metabolism, the investigation way that actually is open about specific  α,β-adrenoceptor agonist like the future in the obesity treatment, is described.El tratamiento de la obesidad, estará basado siempre en dos pilares fundamentales, dieta y ejercicio. No obstante, en determinados casos puede estar indicado un tratamiento farmacológico adicional. Se revisan los posibles tratamientos en función del lugar de actuación, de acuerdo al mismo esquema que sigue el alimento en el organismo, esto es: ingesta, absorción, metabolismo y excreción. De esta forma, se repasan los anorexígenos, que actúan sobre la ingesta; los distintos tipos de fibras e inhibidores que actúan en la absorción; y en los fármacos que actúan sobre el metabolismo, se describe la línea de investigación que actualmente se encuentra abierta sobre fármacos estimuladores  α,β- selectivos, como el futuro en el tratamiento de la obesidad

Pharmacological treatment of obesity

El tratamiento de la obesidad, estará basado siempre en dos pilares fundamentales, dieta y ejercicio. No obstante, en determinados casos puede estar indicado un tratamiento farmacológico adicional. Se revisan los posibles tratamientos en función del lugar de actuación, de acuerdo al mismo esquema que sigue el alimento en el organismo, esto es: ingesta, absorción, metabolismo y excreción. De esta forma, se repasan los anorexígenos, que actúan sobre la ingesta; los distintos tipos de fibras e inhibidores que actúan en la absorción; y en los fármacos que actúan sobre el metabolismo, se describe la línea de investigación que actualmente se encuentra abierta sobre fármacos estimuladores α,β-selectivos, como el futuro en el tratamiento de la obesidad.The treatrnent of the obesity will be based always in two fundamentals points: diet, and exercise. Although, in sorne cases it could be indicated an aditional pharmacologic treatment. Possibles treatments depending of the actuation place, according to the same scheme that food follows in the organism, have been revised. This is: intake, absorption, metabolism and excretion. In this way, the anorexigenics which act on the intake are revised; the different kind of fibres and inhibitors which act in the absorption; and in drugs which act on the metabolism, the investigation way that actually is open about specific α,β-adrenoceptor agonist like the future in the obesity treatment, is described

Compactlight design study

H2020 CompactLight Project aims at designing the next generation of compact hard X-Rays Free-Electron Lasers, relying on very high accelerating gradients and on novel undulator concepts. CompactLight intends to design a compact Hard X-ray FEL facility based on very high-gradient acceleration in the X band of frequencies, on a very bright photo injector, and on short-period/superconductive undulators to enable smaller electron beam energy. If compared to existing facilities, the proposed facility will benefit from a lower electron beam energy, due to the enhanced undulators performance, be significantly more compact, as a consequence both of the lower energy and of the high-gradient X-band structures, have lower electrical power demand and a smaller footprint. CompactLight is a consortium of 24 institutes (21 European + 3 extra Europeans), gathering the world-leading experts both in the domains of X-band acceleration and undulator design

Measurement of zero degree single photon energy spectra for sqrt(s) = 7TeV proton-proton collisions at LHC

In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurance of pile-up events), the single photon spectra at sqrt(s)=7TeV and pseudo-rapidity (eta) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this paper. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra high energy cosmic ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2TeV in the rapidity range 8.81<eta<8.99