726 research outputs found
Measurement of disruption forces in JET using fiber-optic sensors
Monitoring the forces induced on the vacuum vessel when a disruption occurs is essential for the protection of the machine. Since divertor coils have been installed in JET, during disruptions a significant difference between the forces measured on the top and the bottom of the machine has been observed. In order to investigate these further, optical fiber transducers FBGs (Fiber Bragg Gratings) were installed in addition to the currently used strain gauges. During VDE (Vertical Displacement Event) tests, these new transducers were used to measure different level of disruptions ranging from 80T up to 230T vertical forces. The results were then compared with the strain gauges. The FBG measurement was carried out using a broadband light source illuminating an array of 4 FBGs through a combination of directional couplers, connectors and fiber-optic cable. The forces measured both by FBG and by the strain gauges are within the same range, except for the initial swing where large random differences are observed. The tests have demonstrated that the FBG-based force measurement system has adequate resolution (±1.52strain corresponding to a force of 4kN due to the geometry of the leg) and measurement range (50002strain or 13000kN) for this application
Groupoids and an index theorem for conical pseudo-manifolds
We define an analytical index map and a topological index map for conical
pseudomanifolds. These constructions generalize the analogous constructions
used by Atiyah and Singer in the proof of their topological index theorem for a
smooth, compact manifold . A main ingredient is a non-commutative algebra
that plays in our setting the role of . We prove a Thom isomorphism
between non-commutative algebras which gives a new example of wrong way
functoriality in -theory. We then give a new proof of the Atiyah-Singer
index theorem using deformation groupoids and show how it generalizes to
conical pseudomanifolds. We thus prove a topological index theorem for conical
pseudomanifolds
Advanced breast cancer clinical nursing curriculum: review and recommendations
Purpose The needs and concerns of patients with advanced
breast cancer are changing at every phase of the care
intervention. Management and coordination of hospital
resources and services are also steadily evolving. The
objective of the present expert report is to define a new
oncology nursing role specialising in advanced breast
cancer, to help guide patients throughout the whole
healthcare itinerary.
Methods A group of eight experts in oncology nursing and
medical oncology defined the content index of the curriculum
document. A systematic review of bibliography
was carried out, and the relevant contents were extracted.
Based on these contents and the participants’ experience
recommendations were formulated and validated through a
Delphi questionnaire and a participative meeting.
Results The advanced breast cancer clinical nurse
(ABCCN) should develop a clinical, psychosocial role
focused on coordinating patients in the healthcare network.
The nurse would be in charge of evaluating and supervising
the care administered and the healthcare resources used.
The ABCCN should be aware and participate in the protocols
and available resources, be able to solve conflicts,
deal with burn-out signs and have clinical, coaching and
team-working abilities. The proposed curriculum provides
a specific process for the care of patients, as well as an
implementation process.
Conclusions The ABCCN’s role is crucial to assume the
best care and the optimisation of available resources. This
review and consensus document provides the required tools
for the implementation in hospitalsThe development of this work has been possible thanks to the financial support of Novartis Oncolog
Improper colourings inspired by Hadwiger’s conjecture
Hadwiger’s Conjecture asserts that every Kt-minor-free graph has a proper (t − 1)-colouring. We relax the conclusion in Hadwiger’s Conjecture via improper colourings. We prove that every Kt-minor-free graph is (2t − 2)-colourable with monochromatic components of order at most 1/2 (t − 2). This result has no more colours and much smaller monochromatic components than all previous results in this direction. We then prove that every Kt-minor-free graph is (t − 1)-colourable with monochromatic degree at most t − 2. This is the best known degree bound for such a result. Both these theorems are based on a decomposition method of independent interest. We give analogous results for Ks,t-minorfree graphs, which lead to improved bounds on generalised colouring numbers for these classes. Finally, we prove that graphs containing no Kt-immersion are 2-colourable with bounded monochromatic degree
Situation, challenges, and SEOM recommendations for the future of undergraduate education in Oncology in Spain
Purpose The Spanish Society of Medical Oncology (SEOM, for its Spanish acronym) would like to attest to the relevance
of training in Oncology as part of the undergraduate education in Medicine program and issue recommendations to improve
said training, with the aim of responding better to the challenges that cancer poses to our society.
Materials and methods The curricula of 42 schools of medicine were reviewed with interviews with at least one teaching
medical oncologist from each faculty. The qualitative and opinion analysis was completed by means of an online questionnaire
targeting lecturers, resident tutors, and residents in Medical Oncology (MO), enabling the detection of needs and areas
for improvement at an organizational level and in terms of skill acquisition.
Results While the number of medical schools with a specific, mandatory program in MO has grown by up to 90%, it has
not been accompanied by an increase in independent programs. Instead, they largely consist of programs shared with other
specialties (61% of the medical faculties). In most of the undergraduate education programs, Oncology contents are fragmented
and approached from the perspective of each organ system.
Conclusions Despite the positive evolution in recent years, the heterogeneity in Oncology contents during undergraduate
education training continues to be remarkable. Cross-sectional programs with an integral vision, taught in the final years of
undergraduate medical education would be desirable. Among the recommendations for improvement of training in Medical
Oncology, the SEOM proposes that updated, theoretical content be incorporated and clinical practice in Medical Oncology departments be promotedThis study was funded as an unrestricted grant by Jansse
Purification and characterization of an iron-induced ferritin from soybean (Glycine max) cell suspensions
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