Chemical kinetics of SCRAMJET propulsion

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.Includes bibliographical references.by Rodger Joseph Biasca.M.S

“It's only sport” - the symbolic neutralization of “violence”

Within the commodified world of professional ice hockey, athletes sell their bodily performances in return for a salary. A central feature of this transaction is the very real risk of physical injury – a risk inherent within most contact sports, but particularly so within those that feature seemingly ‘violent’ confrontations between competitors, as ice hockey is widely reputed to do. Yet within the spectacle of sport, where physicality can be constructed as playful and unserious, it is possible for the consequences of such action to be concealed behind a symbolic, ludic veneer. Within this paper we explore this process with a particular focus on ice hockey spectators, for whom notions of sport violence as in some important way ‘mimetic’ of the ‘real’ enabled their propensity to both enjoy, and find moral validation through, potentially deleterious behaviours among athletes

Human stem cell neuronal differentiation on silk-carbon nanotube composite

Human embryonic stem cells [hESCs] are able to differentiate into specific lineages corresponding to regulated spatial and temporal signals. This unique attribute holds great promise for regenerative medicine and cell-based therapy for many human diseases such as spinal cord injury [SCI] and multiple sclerosis [MS]. Carbon nanotubes [CNTs] have been successfully used to promote neuronal differentiation, and silk has been widely applied in tissue engineering. This study aims to build silk-CNT composite scaffolds for improved neuron differentiation efficiency from hESCs

Morton Neuroma: Evaluated with Ultrasonography and MR Imaging

Objective The purpose of this study was to compare the diagnostic accuracy of both ultrasonography (US) and magnetic resonance imaging (MRI) for the assessment of Morton neuroma. Materials and Methods Our study group was comprised of 20 neuromas from 17 patients, and the neuromas were confirmed on surgery following evaluation with US, MRI, or both US and MRI. The diagnostic criterion for Morton neuroma, as examined by US, was the presence of a round or ovoid, well-defined, hypoechoic mass. The diagnostic criterion, based on MR imaging, was a well defined mass with intermediate to low signal intensity on both the T1- and T2-weighted images. The retrospective comparison between the sonographic and MR images was done by two experienced radiologists working in consensus with the surgical and pathologic correlations. Results The detection rate of Morton neuroma was 79% for 14 neuromas from 11 patients who had undergone US followed by an operation. The detection rate was 76% for 17 neuromas from 15 patients who had undergone MRI and a subsequent operation. The mean size of the examined neuromas was 4.9 mm on the US images and it was 5.1 mm on the MRI studies. Ten neuromas (71%) were 5 mm or less as measured by US, and three neuromas were not detected, whereas on the MRI analysis, 10 neuromas (59%) were 5 mm or less and four neuromas were not visualized. Among the patients examined during postoperative follow-up, symptoms were completely relieved in 85% and the symptoms were partially relieved in 15%. Conclusion US and MR imaging are comparable modalities with high detection rate for the evaluation of Morton neuroma.ope

Marca Perú:Un signo que distingue

Para abordar el tema de investigación que nos convoca partiremos de poner a la consideración del lector qué entiende una experta en Propiedad Intelectual por el concepto de marca, y es así que para la Consejera de la División de Pequeñas y Medianas Empresas de la Organización Mundial de la Propiedad Intelectual, Tamara Nanayakkara: “Las marcas son signos que permiten diferenciar los productos o servicios de una empresa de los de las demás. Es decir, se considera que constituye una marca el signo compuesto por letras, cifras o elementos figurativos que sirve para distinguir determinados productos o servicios. Hoy en día, cabe considerar marcas incluso los sonidos, formas y olores, siempre y cuando funcionen como tales en el mercad

Minimally invasive total knee replacement : techniques and results

In this review, we outlined the definition of minimally invasive surgery (MIS) in total knee replacement (TKR) and described the different surgical approaches reported in the literature. Afterwards we went through the most recent studies assessing MIS TKR. Next, we searched for potential limitations of MIS knee replacement and tried to answer the following questions: Are there selective criteria and specific patient selection for MIS knee surgery? If there are, then what are they? After all, a discussion and conclusion completed this article. There is certainly room for MIS or at least less invasive surgery (LIS) for appropriate selected patients. Nonetheless, there are differences between approaches. Mini medial parapatellar is easy to master, quick to perform and potentially extendable, whereas mini subvastus and mini midvastus are trickier and require more caution related to risk of hematoma and VMO nerve damage. Current evidence on the safety and efficacy of mini-incision surgery for TKR does not appear fully adequate for the procedure to be used without special arrangements for consent and for audit or continuing research. There is an argument that a sudden jump from standard TKR to MIS TKR, especially without computer assistance such as navigation, patient specific instrumentation (PSI) or robotic, may breach a surgeon's duty of care toward patients because it exposes patients to unnecessary risks. As a final point, more evidence is required on the long-term safety and efficacy of this procedure which will give objective shed light on real benefits of MIS TKR

Comune di Faido : piano corografico

L. Biasc