Search results for "Axis"
showing 10 items of 751 documents
El matrimonio entre el cine y la filosofía: Apuntes sobre la metafilosofía de Stanley Cavell
2019
En este trabajo expondremos brevemente algunas características fundamentales de la concepción de la filosofía defendida por Stanley Cavell, con especial atención a su reivindicación del cine como agente filosófico de pleno derecho. Nuestra intención es presentar las claves del planteamiento metafilosófico de Cavell, con el objetivo de desarrollar posteriormente su concepción del arte cinematográfico como un tipo de praxis filosófica particular, fundada en la tesis de que el cine puede concebirse como un “medio de pensamiento” adecuado para afrontar sendos problemas filosóficos.
Demyelination patterns in a mathematical model of multiple sclerosis.
2016
In this paper we derive a reaction-diffusion-chemotaxis model for the dynamics of multiple sclerosis. We focus on the early inflammatory phase of the disease characterized by activated local microglia, with the recruitment of a systemically activated immune response, and by oligodendrocyte apoptosis. The model consists of three equations describing the evolution of macrophages, cytokine and apoptotic oligodendrocytes. The main driving mechanism is the chemotactic motion of macrophages in response to a chemical gradient provided by the cytokines. Our model generalizes the system proposed by Calvez and Khonsari (Math Comput Model 47(7–8):726–742, 2008) and Khonsari and Calvez (PLos ONE 2(1):e…
What can gender tell us about the pre-retirement experiences of elite distance runners in Finland?: A thematic narrative analysis
2016
Objectives This study explores gendered experiences of the mastery stage in endurance runners' athletic careers in terms of (a) key themes in this period of life, (b) retirement decision-making and (c) changes in athletic and runner identities. Design and method Ten male and nine female athletes aged between 25 and 62 participated in individual interviews. The data were analyzed via thematic narrative analysis. Results and conclusion Gendered meanings permeate career decision-making and retirement patterns of Finnish runners. Female athletes reported many difficulties, including health problems, loneliness, societal pressure and lack of social support during the final years of their careers…
Optical characterization of YCa4O(BO3)3 and Nd:YCa4O(BO3)3 crystals
2007
International audience; We report a complete optical characterization of YCa4O(BO3)3 and Nd:YCa4O(BO3)3 crystals. We studied the relative orientation between the dielectric and the crystallographic frames as a function of the wavelength and performed accurate phase-matching angles measurements for second harmonic generation, using a single crystal cut as a sphere. We also recorded polarized luminescence spectra of Nd:YCOB along the principal axes of the dielectric frame. For both crystals, we measured the gray-tracking and the thermo-optic properties as a function of temperature and wavelength using oriented slabs. Finally, we measured all their dielectric and electro-optic coefficients, as…
ABH-antigenicity of transitional cell carcinoma of the urinary bladder in patients subjected to topical chemoprophylaxis
1983
Topical chemoprophylaxis with adriamycin was administered to 49 patients with UICC-stages pTA and PT1 (pathological stage 0 and A) of transitional cell carcinoma of the urinary bladder. Tumor specimens obtained prior to initiation of the instillation protocol were evaluated with regard to ABH-antigenicity. ABH-antigens were present in tumors of 19 patients and none of these developed muscle-infiltrating recurrences during or after intravesical chemoprophylaxis. The primary lesions of 30 patients were deleted of antigens; only 5 (16%) developed a progressive recurrence. Compared to a historical control group this is thought to be a true reduction of invasive tumor recurrences in ABH-negative…
Phospholipase A2 and arachidonic acid: a common link in the generation of the eosinophil chemotactic factor (ECF) from human PMN by various stimuli.
1980
An eosinophil chemotactic factor (ECF) of low molecular weight can be generated and released from human polymorphonuclear neutrophils by the calcium ionophore, phagocytosis of zymosan particles, arachidonic acid, and phospholipase A2. Since the activation of cells by the ionophore and during the phagocytic event leads to phospholipid turnover, with the subsequent generation of arachidonic acid, it is reasonable that phospholipase A2 represents the common link for ECF production. The kinetics of ECF release by phospholipase A2 is similar to the pattern observed with the various stimuli. After a rapid rise in activity a decline occurred at later times of secretion, suggesting a mechanism of i…
Generation and release of eosinophil chemotactic factor from human polymorphonuclear neutrophils by arachidonic acid
1978
This study describes the generation and release of an eosinophil chemotactic factor from human polymorphonuclear neutrophils, rat basophilic leukemia cells, and from a lymphocyte monocyte basophil suspension by arachidonic acid (AA). The eosinophil chemotactic factor (ECF) is highly specific for eosinophils and resembles the ECF activity obtained from human polymorpho-nuclear neutrophils after stimulation with the Ca ionophore or during phagocytosis. In this regard, AA-induced ECF represents a biological activity distinct from oxidized AA and its conversion products. AA may therefore have a dual function: it represents an important mechanism of cell activation; as AA is converted into prost…
Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector
2012
Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The …
Stability and Finiteness Properties of Medial Axis and Skeleton
2004
The medial axis is a geometric object associated with any bounded open set in \Bbb R^n which has various applications in computer science. We study it from a mathematical point of view. We give some results about its geometrical structure when the open set is subanalytic and we prove that it is stable under C2-perturbations when the open set is bounded by a hypersurface with positive local feature size.
The Effects of Physical Activity on the Gut Microbiota and the Gut-Brain Axis in Preclinical and Human Models: A Narrative Review.
2022
Increasing evidence supports the importance of the gut microbiota (GM) in regulating multiple functions related to host physical health and, more recently, through the gut–brain axis (GBA), mental health. Similarly, the literature on the impact of physical activity (PA), including exercise, on GM and GBA is growing. Therefore, this narrative review summarizes and critically appraises the existing literature that delves into the benefits or adverse effects produced by PA on physical and mental health status through modifications of the GM, highlighting differences and similarities between preclinical and human studies. The same exercise in animal models, whether performed voluntarily or forc…