2kF Peierls Transition for a Half-Filled Band from a Hubbard Hamiltonian Extended with Intersite-Dependent Transfer

We report a model calculation with the Hubbard Hamiltonian, extended with an exponentially dependent intersite transfer, on a half-filled band system. The calculation shows a phase transition which changes from an electronic (at low U/t) to a spin Peierls at high U/t. In the presence of an external magnetic field a new phase (2kF + kF) was found. The specific heat, spin susceptibility, and intensity of the charge transfer absorption was calculated; the results compare reasonably well with experiment. In addition the pressure dependence of the phase transition temperature could be estimated.

True partners? Exploring family-school partnership in secondary education from a collaboration perspective

Although the benefits of family-school partnership are clear, secondary schools struggle to successfully realise this partnership. Drawing on interview data from Dutch parents of secondary school students, this study aims to explore underlying structures of family-school partnership and opportunities for improvement. We defined family-school partnership as boundary crossing in collaboration between equal agents. Using a framework for analysing interdisciplinary collaboration, we explored what levels of co-work can be observed in parents’ accounts and what factors affect parents’ agency in family-school partnership. In total, 24 parents participated in 11 individual semi-structured interviews and 3 focus group interviews. Data were analysed using a template analysis. The analysis showed that, although coordination and collaboration can be observed in the partnership, the most common level of co-work is cooperation. Furthermore, the findings show that at each level of co-work, the agentive roles of parents are affected by equality of condition, including: access to resources, recognition of expertise, and acknowledgement of authority. The study contributes to the scientific understanding of the relationship between families and schools by breaking down the complex concept of family-school partnership into smaller, more tangible and more manageable components. Defining levels of co-work, different agentive roles and different levels of equality helps to deepen the theoretical understanding of the interrelated aspects of family-school partnership. In practice, defining components that are observable may lead to actionable insights

Creating an optimal environment for inclusive education: co-location and transformation in interdisciplinary collaboration

Collaboration between teachers and child support workers is seen as a promising way to effectuate inclusive practice in mainstream education. This paper aims to explore how co-location of services promotes transformation of practice, and to expand an analytic framework for interdisciplinary collaboration. By combining these two perspectives, we intend to contribute to both theory and practice. The data consist of semi-structured interviews that explore the experiences of teachers and child support workers who co-work in three schools for secondary education. A template analysis was used to examine collaboration in co-location, and to further develop the framework with which we began our empirical research. The initial template consisted of dimensions of knowledge sharing in relation to dimensions of trust and dimensions of identity. The results showed that proximity can be divided into three different types, being spatial proximity, organisational proximity and personal proximity. These types of proximity, in turn, can be related to knowledge sharing, trust and identity. The contribution of the expanded framework for practice lies in its potential to shed light on how processes in interdisciplinary collaboration can be shaped

Recommendations for Publication of Genetic Association Studies in Arthritis & Rheumatism

Pathophysiology and treatment of rheumatic disease

ANALYSIS OF NEUTROPHILS, LYMPHOCYTES, AND PLATELETS IN POOLED PHASE 2 AND PHASE 3 STUDIES OF BARICITINIB FOR RHEUMATOID ARTHRITIS

Pathophysiology and treatment of rheumatic disease

Frequency of joint inflammation is associated with local joint damage progression in rheumatoid arthritis despite long-term targeted treatment

Objectives To investigate whether in rheumatoid arthritis (RA) frequency of local joint inflammation is associated with radiographic joint damage progression in that joint. Methods: Data from 473 patients with RA and available radiographs from the BeSt study were used. Patients were treated to target (Disease Activity Score of <= 2.4) for a median of 10 years. At each study visit every 3 months, joints were assessed for swelling and tenderness. Radiographs of hands and feet were made yearly. A generalised linear mixed model was used to assess the association between the percentage of study visits at which clinical inflammation was observed in a joint (cumulative inflammation) and radiographic joint damage in that same joint. Clinical inflammation was primarily defined as joint swelling (with or without joint tenderness). For secondary analyses, we also investigated joint tenderness without joint swelling. Damage was measured as the percentage of the maximum possible Sharp-Van der Heijde score in a particular joint. Results: Cumulative local joint swelling was associated with local progression of radiographic damage in the same joint (beta=0.14, 95% CI 0.13 to 0.15). This association was also found in a subset of joints that were swollen at least once. Cumulative local joint tenderness without concurrent local joint swelling was less strongly associated with local radiographic joint damage progression (beta=0.04, 95% CI 0.03 to 0.05). Conclusions: In RA, long-term cumulative local joint inflammation is associated with joint damage progression in the same joint.</p