Numerical field model simulation of fire and heat transfer in a rectangular compartment

Shipboard fires have been the bane of mariners since man's earliest attempts to sail the sea. Understanding the behavior of fire in an enclosed space such as those found on today's modern seagoing vessels will greatly enhance the mariner's ability to combat or prevent them. In a joint effort between the Naval Postgraduate School and the University of Notre Dame a computer code has been developed to model a full scale fire in a closed compartment. The code uses finite volume formulation to obtain numerical solutions to the unsteady, three-dimensional conservation equations of mass, momentum and energy. Included are the effects of turbulence, strong buoyancy, surface radiation and wall conduction. The code gives velocities, pressure, temperatures and densities throughout the field. This thesis applies that computer code to the U.S. Navy's full scale fire test chamber at Naval Air Warfare Center, China Lake, California. Advance computer graphics techniques, including color contouring and three dimensional vector field plotting have been applied to make output more informative. It is hoped that someday this model could provide a useful tool for naval architects in the design of a fire safe ship, and a cost effective means for developing/evaluation of new firefighting equipment and techniques.http://archive.org/details/numericalfieldmo00thorLieutenant, United States Coast GuardApproved for public release; distribution is unlimited

Resolution enhancement of 2D controlled-source electromagnetic images by use of point-spread function inversion

The marine controlled-source electromagnetic technique is employed both in large-scale geophysical applications as well as within the exploration of hydrocarbons and gas hydrates. Because of the diffusive character of the EM field, only very low frequencies are used, leading to inversion results with low resolution. In this paper, we calculated the resolution matrix associated with the inversion and derived the corresponding point-spread functions. The PSFs provided information about how much the actual inversion was blurred. Using a space-varying deconvolution can thus further improve the inversion result. The actual deblurring was carried out using the nonnegative flexible conjugate gradient least-squares (NN-FCGLS) algorithm, which is a fast iterative restoration technique. To attain completeness, we also introduced the results obtained using a blind deconvolution algorithm based on the maximum likelihood estimation with unknown PSFs. The potential of the proposed approach has been demonstrated using both complex synthetic data and field data acquired at the Wisting oil field in the Barents Sea. In both cases, the resolution of the final inversion result was improved and showed greater agreement with the known target area

Researching prisoner experiences with prison officers: an action research inspired approach

This article reports on research that incorporated action research-inspired dimensions on a project conducted in three maximum-security prisons in England. The project was aimed at collecting ethnographically informed data on prisoner experiences, at developing a method by which such data could be systematically and routinely collected by prison staff and at facilitating opportunities for prison officers to understand the ‘pains of imprisonment’ from the perspectives of prisoners. The challenges and limitations of the project are discussed, with particular reference to the paradox of participation and the role of power relations within prisons and within the research process. It is suggested that despite the inherent difficulties of attempting a participative approach with more powerful actors, facilitating change on a larger scale may be best served by developing a ‘pedagogy of the oppressors’ alongside a ‘pedagogy of the oppressed’

Rehabilitering etter gynekologisk kreft

KvinneKlinikkens Forskningsdag, Bergen, 20. oktober 2021. Arrangør: Universitetet i Bergen og Helse BergenDenne studien skal utforske dei levde livserfaringane til kvinner som er ferdigbehandla for gynekologisk kreft, og som har teke del i Gynea. Studien har hovudfokus på føljande område: Behov for oppføljing etter behandling. Deltaking i ein digital intervensjon. Behov for rehabilitering av seksuell helse.submittedVersio

Mesenchymal chondrosarcoma: prognostic factors and outcome in 113 patients. A European Musculoskeletal Oncology Society study

BACKGROUND: Mesenchymal chondrosarcoma (MCS) is a distinct, very rare sarcoma with little evidence supporting treatment recommendations. PATIENTS AND METHODS: Specialist centres collaborated to report prognostic factors and outcome for 113 patients. RESULTS: Median age was 30 years (range: 11-80), male/female ratio 1.1. Primary sites were extremities (40%), trunk (47%) and head and neck (13%), 41 arising primarily in soft tissue. Seventeen patients had metastases at diagnosis. Mean follow-up was 14.9 years (range: 1-34), median overall survival (OS) 17 years (95% confidence interval (CI): 10.3-28.6). Ninety-five of 96 patients with localised disease underwent surgery, 54 additionally received combination chemotherapy. Sixty-five of 95 patients are alive and 45 progression-free (5 local recurrence, 34 distant metastases, 11 combined). Median progression-free survival (PFS) and OS were 7 (95% CI: 3.03-10.96) and 20 (95% CI: 12.63-27.36) years respectively. Chemotherapy administration in patients with localised disease was associated with reduced risk of recurrence (P=0.046; hazard ratio (HR)=0.482 95% CI: 0.213-0.996) and death (P=0.004; HR=0.445 95% CI: 0.256-0.774). Clear resection margins predicted less frequent local recurrence (2% versus 27%; P=0.002). Primary site and origin did not influence survival. The absence of metastases at diagnosis was associated with a significantly better outcome (P<0.0001). Data on radiotherapy indications, dose and fractionation were insufficiently complete, to allow comment of its impact on outcomes. Median OS for patients with metastases at presentation was 3 years (95% CI: 0-4.25). CONCLUSIONS: Prognosis in MCS varies considerably. Metastatic disease at diagnosis has the strongest impact on survival. Complete resection and adjuvant chemotherapy should be considered as standard of care for localised disease

Video-based Simulations: Considerations for Teaching Students with Developmental Disabilities

The use of video-based multimedia simulations for teaching functional skills to persons with developmental disabilities remains an unexplored application of technology for this group. This article examines the historical literature in this area, and discusses future considerations, design issues, and implications of using multimedia simulations. Implementation issues are presented, and suggestions regarding design, development, and application of multimedia simulations are offered. Considerations address the importance of appropriate role modeling and the combination of video-based simulation and in vivo training to foster generalization and maintenance in the context of transition to the real world.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline