Development of magnetostrictive active members for control of space structures

The goal of this Phase 2 Small Business Innovative Research (SBIR) project was to determine the technical feasibility of developing magnetostrictive active members for use as truss elements in space structures. Active members control elastic vibrations of truss-based space structures and integrate the functions of truss structure element, actively controlled actuator, and sensor. The active members must control structural motion to the sub-micron level and, for many proposed space applications, work at cryogenic temperatures. Under this program both room temperature and cryogenic temperature magnetostrictive active members were designed, fabricated, and tested. The results of these performance tests indicated that room temperature magnetostrictive actuators feature higher strain, stiffness, and force capability with lower amplifier requirements than similarly sized piezoelectric or electrostrictive active members, at the cost of higher mass. Two different cryogenic temperature magnetostrictive materials were tested at liquid nitrogen temperatures, both with larger strain capability than the room temperature magnetostrictive materials. The cryogenic active member development included the design and fabrication of a cryostat that allows operation of the cryogenic active member in a space structure testbed

Stretching the Comfort Zone: Using Early Clinical Contact to Influence Professional Identity Formation in Medical Students

Purpose: To explore first-year medical students’ affective reactions to intimate encounters with severely sick patients in their homes, within a curricular innovation targeting the development of a patient-centered professional identity. Background: Early patient encounters create complex emotional challenges and constitute fertile ground for professional identity formation. The literature indicates that students often learn, largely through the hidden curriculum, to avoid and suppress emotion. This can culminate in mental health problems and loss of empathy. Method: A qualitative descriptive analysis of 28 randomly selected, mandatory, reflective essays focused on a home visit to a previously unknown patient, in an unsupervised group of 4 students, within the context of a structured course called Patient Contact—PASKON. Results: Students described a wide range of affect-laden responses, positive and negative, elicited by the home visits. The observations were typically related to loss of control, struggles to behave “professionally,” and the unmasking of stereotypes and prejudices. Conclusions: Medical students’ initial clinical encounters elicit emotional responses that have the potential to serve as triggers for the development of emotional maturity, relational skills, and patient-centered attitudes. Conversely, they can foreground uncertainty and lead to defensive distancing from patients’ existential concerns. The findings point to a role for structured educational strategies and supervision to assist students in the emotion work necessary in the transition from a “lay” to a “medical” identity.publishedVersio

Group mentorship for undergraduate medical students—a systematic review

Introduction - Mentoring has become a prevalent educational strategy in medical education, with various aims. Published reviews of mentoring report very little on group-based mentorship programs. The aim of this systematic review was to identify group-based mentorship programs for undergraduate medical students and describe their aims, structures, contents and program evaluations. Based on the findings of this review, the authors provide recommendations for the organization and assessment of such programs. Methods - A systematic review was conducted, according to PRISMA guidelines, and using the databases Ovid MEDLINE, EMBASE, PsycINFO and ERIC up to July 2019. Eight hundred abstracts were retrieved and 20 studies included. Quality assessment of the quantitative studies was done using the Medical Education Research Study Quality Instrument (MERSQI). Results - The 20 included studies describe 17 different group mentorship programs for undergraduate medical students in seven countries. The programs were differently structured and used a variety of methods to achieve aims related to professional development and evaluation approaches. Most of the studies used a single-group cross-sectional design conducted at a single institution. Despite the modest quality, the evaluation data are remarkably supportive of mentoring medical students in groups. Discussion - Group mentoring holds great potential for undergraduate medical education. However, the scientific literature on this genre is sparse. The findings indicate that group mentorship programs benefit from being longitudinal and mandatory. Ideally, they should provide opportunities throughout undergraduate medical education for regular meetings where discussions and personal reflection occur in a supportive environment

Factors influencing mentors’ satisfaction: A study from medical schools in Norway and Canada

Phenomenon: The mentoring of undergraduate medical students has been shown to benefit the mentors; however, detailed information on the factors that influence the satisfaction and motivation of mentors remains unclear. Such knowledge can be useful in sustaining group mentorship programs. The aim of this study was to investigate the experiences and perspectives of mentors to ascertain the factors that contribute to satisfaction and motivation. Approach: As part of a larger research project, a survey was sent out to mentors at UiT the Arctic University of Norway, the University of Bergen and McGill University (N=461). Descriptive statistics, linear regression and factor analyses were used to examine the data in order to map factors associated with mentor satisfaction. Findings: The overall response rate was 59% (n=272/461). Mentors reported a high mean satisfaction score of 4.55 (±0.04, median 5.00) on a five-point Likert scale. Six out of nine statements describing how mentors approach group mentoring were strongly correlated with each other. Through factor analysis of the items, we found a dominating factor labeled “Student-centered mentoring approach” which was strongly associated with the level of satisfaction as a mentor. Additionally, highly satisfied mentors took a greater interest in patient-centered medicine and their students’ personal development. Their groups spent more time discussing students’ clinical experiences, societal poverty and health, and patients’ suffering and sickness. Insights: Our findings suggest that high mentor satisfaction, which is important for the pedagogical quality and sustainability of mentor programs, is related to the mentors’ student-centeredness and their interest in topics concerning professionalism. By preparing mentors for their roles and supporting them in developing strategies for establishing good mentoring relationships, the outcomes of group mentoring may be improved both for mentors and students. Interest in students’ personal development and the mentors’ own professional development seem to be indicators of mentors’ satisfaction and should be encouraged in mentorship programs

Medical students as whole persons – tending to the elephants in clinical practice training

BackgroundFor years, we have known that many medical students lose empathy and experience burn out during the last part of their undergraduate education, despite starting with high motivation and above average mental health. The most powerful learning environment is the clinic, where students in the final stages of their program interact with real patients and practice doctor’s skills in authentic environments. We wondered how students at this stage are cared for as learners and novice professionals. We tried to identify explicit and hidden professional norms and competence goals that students are measured by, and sanctioned for not conforming with, in daily practice. We asked: Is there a mismatch between what medical students need to manage in their professional lives and the affordances inherent to the workplace environment where learning takes place?  Can we intervene to mitigate any gaps? MethodInspired by the Consolidated Framework for Implementation Research (CFIR), we engaged leaders, physicians, residents, and medical students at a small Norwegian hospital in a three-year project aiming to improve students’ motivation, participation, and clinical learning, by strengthening pedagogical and affective support during an 8-week practice period. ResultsMedical students and residents identified needs for preparation and orientation, continuity, and secure relationships where learners are acknowledged as unique individuals. A simple model of learning needs was developed, where educational goals can be arranged on three levels: 1) social survival, 2) medical knowledge and skills, and 3) clinical wisdom

Standalone vertex finding in the ATLAS muon spectrometer

A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011

Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H →γ γ, H → Z Z∗ →4l and H →W W∗ →lνlν. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson

Measurement of the top quark-pair production cross section with ATLAS in pp collisions at \sqrt{s}=7\TeV

A measurement of the production cross-section for top quark pairs(\ttbar) in $pp$ collisions at \sqrt{s}=7 \TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron $e$ or muon $\mu$) with large missing transverse energy and at least four jets, and dilepton ($ee$, $\mu\mu$ or $e\mu$) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb-1, 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-\ttbar Standard Model processes are estimated using data-driven methods and determined to be $12.2 \pm 3.9$ events and $2.5 \pm 0.6$ events, respectively. The kinematic properties of the selected events are consistent with SM \ttbar production. The inclusive top quark pair production cross-section is measured to be \sigmattbar=145 \pm 31 ^{+42}_{-27} pb where the first uncertainty is statistical and the second systematic. The measurement agrees with perturbative QCD calculations.Comment: 30 pages plus author list (50 pages total), 9 figures, 11 tables, CERN-PH number and final journal adde

Measurement of the top quark pair cross section with ATLAS in pp collisions at √s=7 TeV using final states with an electron or a muon and a hadronically decaying τ lepton

A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb -1. Events with an isolated electron or muon and a τ lepton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, σtt-=186±13(stat.)±20(syst.)±7(lumi.) pb, is in good agreement with the Standard Model prediction

Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector

This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at √s=7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb−1. Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displaced decay vertices and optimised for jet flavour identification, are used in a multidimensional template fit to measure the fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity |y|<2.1. The fit results agree with the predictions of leading- and next-to-leading-order calculations, with the exception of the dijet fraction composed of bottom and light flavour jets, which is underestimated by all models at large transverse jet momenta. The ability to identify jets containing two b-hadrons, originating from e.g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions