1,721,068 research outputs found
[Changes in nasal resistance as a result of posture in normal subjects].
No full textThe variations of nasal resistance, after lateral right, lateral left and supine recumbency have been studied in 20 normal subjects. These variations were in order of constant succession by rhinomanometry. In lateral right recumbency (first recumbency), the mean increase of nasal resistance in lower nasal cavity was 35%; on the contrary in the following recumbency the increase was twice as large as the first one. In supine recumbency the results were abnormal. In fact, with respect to the same nasal cavity, some of our subjects showed a congestion, while some showed a decongestion. It may be concluded that utilization of postural tests, like index vasomotor reactivity, must keep the increase of nasal resistance in normal subject, following postural variations in mind, in order to express a judgement of significative pathological difference
[Nasal provocation test with histamine: rhinomanometry study of normal subjects].
No full textNasal reactivity to histamine was evaluated in 40 normal subjects. The application of a chloride histamine solution (1 mg) registered in 90% of the subjects the appearance of sneezing with the number of sneezes ranging between one and fourteen (5.7 +/- 3.76) and an average increase in the total resistence in the inspiration phase of 93.1% (+/- 63.2) and in the expiration phase of 98.1% (+/- 60.5) with a range between 37.7% and 24.1%. The authors conclude that sneezing and above all nasal congestion evaluated rhinomanometrically represent two important parameters in the evaluation of nasal reaction; an increase greater than or equal to 200% of the total nasal resistance can surely be considered an index of nasal hyperreactivity
[Nasal provocation test with hyperosmolar solutions: normal values].
No full textHyperosmolar solutions have recently been introduced as test-substances in the nasal provocation of vasomotor rhinitis subjects. In order to establish a norm, the test was carried out in 40 subjects without nasal pathologies, stimulating with solutions at increasing level of concentrations of NaCl (0.9% - 1.8 - 3.6% - 5.4% - 7.2% - 9%). In all subjects an increase in nasal secretion was verified in proportion to the concentration of the solutions and this increase was statistically significative, with respect to the base, from the concentration 3.6% (p less than 0.001) on words. The statistical analysis has not, however, evidenced any significant differences in secretion between male or female subjects. As far as the variation of nasal resistance is concerned, the rhinomanometric registration has revealed that the hypertonic solutions modify such resistances in a rather casual, absolutely irregular and unimportant way. These results lead to believe that the test is extremely useful in the study of the secretion component of vasomotor rhinopathy
APLICACIÓN DE HERRAMIENTAS SIG EN LA ESTIMACIÓN DE LAS NECESIDADES DE ÁCIDO NÍTRICO PARA EVITAR LA OBTURACIÓN DE EMISORES POR DEPÓSITOS CALIZOS EN LOS SISTEMAS DE RIEGO LOCALIZADO EN EL OLIVAR DE LA PROVINCIA DE JAÉN
Full text linkPosterPérez-Latorre, F.; Peragón, J.; Delgado, A. (2015). APLICACIÓN DE HERRAMIENTAS SIG EN LA ESTIMACIÓN DE LAS NECESIDADES DE ÁCIDO NÍTRICO PARA EVITAR LA OBTURACIÓN DE EMISORES POR DEPÓSITOS CALIZOS EN LOS SISTEMAS DE RIEGO LOCALIZADO EN EL OLIVAR DE LA PROVINCIA DE JAÉN. En XXXIII CONGRESO NACIONAL DE RIEGOS. Valencia 16-18 junio de 2015. Editorial Universitat Politècnica de València. https://riunet.upv.es/handle/10251/85869OC
[Muco-ciliary transport in chronic inflammatory pathology of the middle ear].
No full textThe Authors have studied the behaviour of nasal mucociliary transport (MCT) in the chronic phlogistic pathology of the middle ear, in subjects suffering from simple and cholesteatomatous otitis. In both groups the duration of MCT was longer than a control group of normal subjects; instead no significant difference was observed either between the two kind of pathologies nor between the two different phases of the otitis (quiescence and breakthrough). The Authors conclude therefore that, in the recurrent phlogistic pathology of the middle ear, the function of MCT must be carefully studied, possibly corrected if damaged, to prevent the evolution in the breakthrough
[Effect of physical exercise on nasal resistance in normal subjects and in patients with vasomotor rhinopathy].
No full textThe study has evaluated the behaviour of the nasal resistances, studied using Anterior Active Rhinomanometry, after physical exercise, in normal subjects and in allergic and non allergic vasomotor rhinopathics. The results, in accordance with the literature, show a reduction of nasal resistances in all subjects, particularly in the rhinopathics, immediately after the effort and a return to the starting values after a rest period of 30 minutes. Among vasomotor patients, only the non-allergic group has shown very significant variations in the resistances, because in these subjects there is almost always an exaltation of the neurovegetative system, which we did not observe in the allergic subjects in the intercritical phase. The effort test is therefore, among the aspecific tests of nasal reactivity useful, perhaps, more to therapy than to diagnostic aims
Autonomous crater detection on asteroids using a fully-convolutional neural network
No full textThis paper shows the application of autonomous Crater Detection using a Fully-Convolutional Neural Network (FCN) on a main belt asteroid, Ceres. The FCN, namely a U-Net, is trained on optical images of the Moon Global Morphology Mosaic based on data collected by the Lunar Recoinnassance Orbiter (LRO), using manual crater catalogues as annotations for the creation of ground truth data. The Moon-trained network will then be tested on optical images of Ceres taken during the Dawn mission; as this network is adapted to a different domain from the one upon which it was already trained, this task is accomplished by means of a Transfer Learning (TL) approach. In particular, this work will take into consideration a homogeneous TL, because the image features and labels share the same qualities in both domains. The Moon-trained model has been fine-tuned using 100, 500 and 1000 additional annotated images of Ceres, reaching a testing accuracy on 350 never before seen images of 96.24%, 96.95% and 97.19%, respectively. Annotations for Ceres are taken from the Zeilnhofer crater catalogue, containing 44.594 craters with diameter greater than 1 km in a latitude range of 84.66°S-89.62°N, full longitude: therefore, a near-global coverage of the asteroid surface will be taken into consideration.
The output of the U-Net is a grey-scale mask containing predicted craters: it will be post-processed applying global thresholding for image binarization and a template matching algorithm to extract craters positions and radii in the pixel space: this allows the creation of a definitive binary mask. These post-processed craters will be counted and compared to the ground truth data in order to compute image segmentation metrics: precision, recall and their harmonic mean known as F1 score. Precision, which is the ratio between matched craters and all the craters found by the network, reached values of 70.51%, 84.43% and 83.45%. Recall, defined as the ratio between matched and catalogued craters, achieved performances of 48.27%, 53.32% and 58.97%; the lower values are due to the fact that when precision is high, recall is automatically penalized and vice versa. The F1 score is introduced to sum up the effects of both the above indices: its reached percentages are 57.30%, 65.36% and 69.11%. These results are considered to be encouraging because they are comparable with other works that use the U-Net in a Crater Detection contex
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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