4,114 research outputs found
Study of phenomena related to the sintering process of silicon nitride at atmospheric pressure
A procedure was perfected for the production of components used in engineering applications of silicon nitride. Particles of complex geometry that combine remarkable mechanical properties with a high density are obtained. The process developed, in contrast to the "hot pressing" method, does not use external pressures, and in contrast to the reaction bonding method, final densities close to the theoretical value are obtained
A measurement of the teaching effectiveness of educational kinescopes in general science in the junior high school.
Thesis (M.S.)--Boston Universit
Upadacitinib: One More Option in the Treatment of Patients with Rheumatoid Arthritis and Crohn's Disease
Arthritis and IBD are conditions that can occur in the same patient simultaneously. The complexity
in managing these cases lies in detecting the signs and symptoms that point to the onset of the
disease at an early stage, and in choosing an appropriate course of treatment to control the joint
and intestinal aspects at the same time. In recent times, a new class of drugs has been added to the
treatment options: JAK inhibitors (JAKi), of which Upadacitinib is one. Being able to manage and
follow up with these patients in joint gastro-rheumatology outpatient clinics, where professionals
from both disciplines are able to follow these cases appropriately, avoiding delays in diagnosis andtreatment, is also importan
Retroperitoneal pararenal isolated neurofibroma: report of a case and review of literature
The neurofibroma is a tumour of neural origin. This kind of neoplasm, though, is generally skin located. Rare cases in deep organs or in the peritoneal cavity are also reported in the literature. There are two types of neurofibromas, localized and diffuse; the latter is associated with von Recklinghausen disease and always occurs together with skin neurofibromas. Here we report the case of a 47-year-old man affected by retroperitoneal neurofibroma, but not associated with von Recklinghausen disease. A computed tomography (CT) scan described a retroperitoneal pararenal lesion with no clear involvement of adjacent viscera. We describe the diagnostic modality, treatment planning and the timing of treatment of this neoplasm, reviewing also the literature
Diatom extraction: A new technique with heated H2O2. A technical note
The best method of diatom identification in animal and human tissues is still an important discussion topic, in terms of effectiveness and reliability. In this technical note, authors propose a new method of extraction of diatoms using heated hydrogen peroxide from animal and human tissue samples. This method has been compared with the traditional method of digestion with acids. The results of the comparison show that heated hydrogen peroxide extraction is more efficient in terms of reduction of sediment, extraction of the material and preservation of diatoms proving to be a viable alternative to conventional approaches with acids in terms of costs and operator safety
Ingress of Coolant Event simulation with TRACE code with accuracy evaluation and coupled DAKOTA Uncertainty Analysis
Among the Postulated Initiating Events in nuclear fusion plants, the Ingress of Coolant Event (ICE) in the Plasma Chamber is one of the main safety issues. In the present paper, the best estimate thermal-hydraulic system code TRACE, developed by USNRC, has been adopted to study the ICE, and it has been qualified based on experimental results obtained in the Integrated ICE facility at JAERI. A nodalization has been developed in the SNAP environment/architecture, using also the TRACE 3D Vessel component where multidimensional phenomena could occur. The accuracy of the code calculation has been assessed both from a qualitative and quantitative point of view. In addition, an Uncertainty Analysis (UA), with the probabilistic method to propagate the input uncertainties, has been performed to characterize the dispersion of the results. The analysis has been carried out with the DAKOTA toolkit coupled with TRACE code in the SNAP environment/architecture. Results show the adequacy of the 3D nodalization and the capability of the code to follow the transient evolution also at a very low pressure. Response correlations have been computed to characterize the correlation between the selected uncertain input parameters and the Plasma Chamber pressure
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Achieving portability through software conversion
Conversion of software written for one machine or
operating system to equivalent software for another machine
or operating system is shown to be economically attractive
using source-to-source translation. The features of an
automatic converter are described using a Pascal-to-C
translater as an example. Solutions to the problems of
denesting procedures, converting data structures and types,
converting control structures and operators, and converting
semantics in one language into equivalent semantics in
another language are proposed and evaluated in terms of an
algorithmic translator. The results obtained through
experience suggest that algorithmic translation from one
language to another can yield 95 to 99 per cent conversion
without human intervention, leading to significant
improvements over other methods of software conversion
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