New Results for Light Gravitinos at Hadron Colliders - Tevatron Limits and LHC Perspectives

We derive Feynman rules for the interactions of a single gravitino with (s)quarks and gluons/gluinos from an effective supergravity Lagrangian in non-derivative form and use them to calculate the hadroproduction cross sections and decay widths of single gravitinos. We confirm the results obtained previously with a derivative Lagrangian as well as those obtained with the non-derivative Lagrangian in the high-energy limit and elaborate on the connection between gauge independence and the presence of quartic vertices. We perform extensive numerical studies of branching ratios, total cross sections, and transverse-momentum spectra at the Tevatron and the LHC. From the latest CDF monojet cross section limit, we derive a new and robust exclusion contour in the gravitino-squark/gluino mass plane, implying that gravitinos with masses below $2\cdot10^{-5}$ to $1\cdot10^{-5}$ eV are excluded for squark/gluino-masses below 200 and 500 GeV, respectively. These limits are complementary to the one obtained by the CDF collaboration, $1.1\cdot 10^{-5}$ eV, under the assumption of infinitely heavy squarks and gluinos. For the LHC, we conclude that SUSY scenarios with light gravitinos will lead to a striking monojet signal very quickly after its startup.Comment: 30 pages, 12 figures. Tevatron limit improved and unitarity limit included. Version to be published in Phys. Rev.

Study of the Al-grading effect in the crystallisation of chalcopyrite Cu(In,Al)Se2 thin films selenised at different temperatures

Chalcopyrite CuIn1−xAlxSe2 (CIAS) thin films with an atomic ratio of Al/(In + Al) = 0.4 were grown by a two-stage process onto soda-lime glass substrates. The selenisation was carried out at different temperatures, ranging from 400 °C to 550 °C, for metallic precursors layers evaporated with two different sequences. The first sequence, C1, was evaporated with the Al as the last layer, while in the second one, C2, the In was the last evaporated element. The optical, structural and morphological characterisations led to the conclusion that the precursors sequence determines the crystallisation pathway, resulting in C1 the best option due to the homogeneity of the depth distribution of the elements. The influence of the selenisation temperature was also studied, finding 540 °C as the optimum one, since it allows to achieve the highest band gap value for the C1 sequence and for the given composition

Energy Conversion Using New Thermoelectric Generator

During recent years, microelectronics helped to develop complex and varied technologies. It appears that many of these technologies can be applied successfully to realize Seebeck micro generators: photolithography and deposition methods allow to elaborate thin thermoelectric structures at the micro-scale level. Our goal is to scavenge energy by developing a miniature power source for operating electronic components. First Bi and Sb micro-devices on silicon glass substrate have been manufactured with an area of 1cm2 including more than one hundred junctions. Each step of process fabrication has been optimized: photolithography, deposition process, anneals conditions and metallic connections. Different device structures have been realized with different micro-line dimensions. Each devices performance will be reviewed and discussed in function of their design structure.Comment: Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions

Superficial Scald versus Ethanol Vapours: A Dose Response

Early picked "Granny Smith" apples (Malus domestica Borkh.) were stored under air or CA (controlled atmosphere at 2 kPa O2 and <1 kPa CO2) at 1°C. During the first week of storage, fruit was subjected to ethanol vapours in doses from 0 to 8 g/kg of fruit. Ethanol at 4 g/kg protected fruit against superficial scald in CA storage for at least 5.5 months, plus two weeks in cold air storage, plus a week at ambient temperature. Ethanol at 6 g/kg protected fruit in cold air storage for 3 months, plus a week at ambient temperature. Effects of ethanol vapours and CA on headspace ethylene levels are discussed. Ethanol vapours did not cause significant off-flavours in "Granny Smith" apples (consumer panel, hedonic scale), or purpling of the skin of Red Delicious apples (visual assessment)

Development of a programme to facilitate interprofessional simulation-based training for final year undergraduate healthcare students

Original report can be found at: http://www.health.heacademy.ac.uk/publications/miniproject/alinier260109.pdfIntroduction: Students have few opportunities to practise alongside students from other disciplines. Simulation offers an ideal context to provide them with concrete experience in a safe and controlled environment. This project was about the development of a programme to facilitate interprofessional scenario-based simulation training for final year undergraduate healthcare students and explored whether simulation improved trainees’ knowledge of other healthcare discipline’s roles and skills. Methods: A multidisciplinary academic project team was created and trained for the development and facilitation of this project. The team worked on the development of appropriate multiprofessional scenarios and a strategy to recruit the final year students on a volunteer basis to the project. By the end of the project 95 students were involved in small groups to one of fifteen 3-hour interprofessional simulation sessions. Staff role played the relatives, doctor on call, and patient when it was more appropriate than using a patient simulator (Laerdal SimMan/SimBaby) in the simulated community setting and paediatric or adult emergency department. Each session had 3 to 4 of the following disciplines represented (Adult/Children/Learning Disability Nursing, Paramedic, Radiography, Physiotherapy) and each student observed and took part in one long and relevant high-fidelity scenario. Half the students were randomly selected to fill in a 40-item questionnaire testing their knowledge of other disciplines before the simulation (control group) and the others after (experimental group). Students were assessed on the questions relating to the disciplines represented in their session. Results: By the end of the project 95 questionnaires were collected of which 45 were control group students (Questionnaire before simulation) and 50 experimental group students (Questionnaire after simulation). Both groups were comparable in terms of gender, discipline and age representation. Participants were: Adult nurses (n=46), Children’s nurses (n=4), Learning Disability nurses (n=7), Nurses, Paramedics (n=8), Radiographers (n=20), Physiotherapists (n=8). 15 sessions were run with an average of around 7 participants and at least 3 disciplines represented. The knowledge test results about the disciplines represented was significantly different between the control and experimental groups (Control 73.80%, 95% CI 70.95-76.65; and Experimental 78.81%, 95% CI 75.76-81.87, p=0.02). In addition, there were sometimes reliable differences between the groups in their view of multidisciplinary training; confidence about working as part of a multidisciplinary team was 3.33 (SD=0.80, Control) and 3.79 (SD=0.90, Experimental), p=0.011; their anticipation that working as part of a multidisciplinary team would make them feel anxious was 2.67 (SD=1.17, Control) and 2.25 (SD=1.04, Experimental), p=0.073; their perception of their knowledge of what other healthcare professionals can or cannot do was 3.00 (SD=0.91, Control) and 3.35 (SD=0.93, Experimental), p=0.066; their view that learning with other healthcare students before qualification will improve their relationship after qualification was 3.93 (SD=1.14, Control) and 4.33 (SD=0.81, Experimental), p=0.055; their opinion about interprofessional learning helping them to become better team workers before qualification was 3.96 (SD=1.24, Control) and 4.42 (SD=0.77, Experimental), p=0.036. Conclusions: Although the difference is relatively small (~5%), the results demonstrate that students gained confidence and knowledge about the skills and role of other disciplines involved in their session. Through simulation, the positivism of students about different aspects of learning or working with other healthcare disciplines has significantly improved. Students gained knowledge of other disciplines simply by being given the opportunity to take part in a multiprofessional scenario and observe another one. The results of the test and their reported perception about multidisciplinary team working suggest that they are better prepared to enter the healthcare workforce. Discussions during the debriefings highlighted the fact that multidisciplinary training is important. The main challenges identified have been the voluntary student attendance and timetabling issues forcing us to run the session late in the day due to the number of disciplines involved in each session and their different placement rota. The aim is now to timetable formally this session within their curriculum. Introducing simulation in the undergraduate curriculum should facilitate its implementation as Continuing Professional Development once these students become qualified healthcare professionals

Inverse Scattering and Acousto-Optic Imaging

We propose a tomographic method to reconstruct the optical properties of a highly-scattering medium from incoherent acousto-optic measurements. The method is based on the solution to an inverse problem for the diffusion equation and makes use of the principle of interior control of boundary measurements by an external wave field.Comment: 10 page

3D printing of gas jet nozzles for laser-plasma accelerators

Recent results on laser wakefield acceleration in tailored plasma channels have underlined the importance of controlling the density profile of the gas target. In particular it was reported that appropriate density tailoring can result in improved injection, acceleration and collimation of laser-accelerated electron beams. To achieve such profiles innovative target designs are required. For this purpose we have reviewed the usage of additive layer manufacturing, commonly known as 3D printing, in order to produce gas jet nozzles. Notably we have compared the performance of two industry standard techniques, namely selective laser sintering (SLS) and stereolithography (SLA). Furthermore we have used the common fused deposition modeling (FDM) to reproduce basic gas jet designs and used SLA and SLS for more sophisticated nozzle designs. The nozzles are characterized interferometrically and used for electron acceleration experiments with the Salle Jaune terawatt laser at Laboratoire d'Optique Appliqu\'ee