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Role of crushed skeletal muscle extract in hemostasis

Rajiv, S.; Rodgers, S.; Bassiouni, A.; Vreugde, S.; Wormald, P.J.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
Publicado em //2015 Português
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BACKGROUND: Use of muscle grafts for hemostasis during surgery has re-emerged; recent animal model studies have shown effective bleeding control with their use. However, the mechanism of action is unknown. The aim of this study is to evaluate the action of muscle extracts on the coagulation pathways and platelet aggregation. METHODS: Muscle extracts were prepared by dissolving crushed snap-frozen muscle tissue (0.04 to 0.8 mg) in 1 mL saline. Saline was used as control. Prothrombin time, activated partial thromboplastin time (APTT), thrombin time, and platelet aggregation studies were performed on both muscle extract and saline. Prothrombin time and APTT were repeated using factor VII-deficient plasma, factor X-deficient plasma, lupus plasma, and contact pathway-inhibited plasma. Mean readings in the muscle group and control group were compared using nonparametric Mann-Whitney U test (Wilcoxon rank sum test with continuity correction). RESULTS: Among the various coagulation parameters, there was no significant difference between saline and muscle (p > 0.05), except in the APTT using factor X-deficient plasma (mean APTT 133.89 seconds and 185.10 seconds for muscle and saline, respectively; p < 0.0001). Higher concentrations of the muscle extract (>0.5 mg/mL) increased platelet aggregation from 23.9% to 85.5% (p = 0.0001). CONCLUSION: Platelet aggregation plays a role in the hemostatic efficacy of muscle grafts. Even though action on the coagulation pathway via APTT is statistically significant...

Chromium oxide (51Cr2O3 ) used as biological marker was not absorbed by fish

Sakita,G.Z.; Meira,D.C.; Bremer Neto,H.; Cyrino,J.E.P.; Abdalla,A.L.
Fonte: Universidade Federal de Minas Gerais, Escola de Veterinária Publicador: Universidade Federal de Minas Gerais, Escola de Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 Português
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The aim of this study was to evaluate the rate absorption of radio-labeled chromium oxide (51Cr2O3), used as biological marker in nutrition studies with Nile tilapia Oreochromis niloticus. An experimental diet with approximately 58 µCi of specific activity of the element was encapsulated and fed daily to 35 adult Nile tilapia; a group of 35 fish was used as control feeding on a basal diet. At the beginning of the experiment five fish from each group were randomly selected and blood samples were drawn from control (BC) and experimental fish (BE). Fish were then euthanized by anesthetic overdoses and samples of the liver tissue (LT), renal tissue (RT), stomach without content (S), intestine without content (I), gills tissue (GT), muscle tissue (fillet; MT), visceral fat (VF), content of the digestive tract (CTDE) and water aquarium were collected from the experimental fish. The procedure was repeated daily for one week. Simple linear regressions were adjusted - days of collection vs. determination coefficients, and were established for statistical comparisons of the measured activity of 51Cr readings in sampled blood and tissues (logarithmic transformation) for samples of the control and experimental fish. No differences (P>0.05) were detected between samples from BC fish and BE...

Does a ‘Back App’ ergonomic stool reduce the muscular effort of unsupported sitting?

White, Alison
Fonte: Department of Physiotherapy, University of Limerick Publicador: Department of Physiotherapy, University of Limerick
Tipo: Bachelor thesis; all_ul_research; ul_theses_dissertations; none
Português
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non-peer-reviewed; Background: 'Back App' is a novel ergonomic stool whose seat design increases thigh-trunk angle similar to a saddle chair. It features an optional dynamic setting by means of an adjustable stability ball. To date no studies have investigated trunk muscle activity on saddle seats and studies are inconclusive as to the effect of dynamic seats. Objectives: The primary aim was to compare a 'Back App' stool with a standard stool and determine if it alters trunk muscle activity and discomfort during a typing task and if it alters trunk muscle activity during an optimal sitting posture. Secondary aim was to see if the dynamic 'Back App' setting increases trunk muscle activity. Methods: A repeated measures study design was used (n=10 subjects). Surface Electromyography of 6 superficial trunk muscles was recorded for; (i) a 10-minute typing task and (ii) a 1-minute neutral lordotic sitting posture task (O'Sullivan et al, 2010). Readings were compared for a standard stool, a stable 'Back App' stool and a dynamic 'Back App' stool. Discomfort was assessed using the Body Part Discomfort Scale (BPDS). Results: Iliocostalis Lumborum par Thoracic (ICLT) and Superficial Lumbar Multifidus (SLM) activity was reduced on both 'Back App' stools compared with the standard stool: significant for ICLT during the typing task (P=0.028) and SLM during optimal sitting posture (P=0.032). Mean discomfort did not differ significantly. Conclusions: The 'Back App' stool significantly reduces the effort of specific back muscles required for unsupported habitual and optimal sitting postures. The dynamic 'Back App' setting did not significantly alter trunk muscle activity.

The Effectiveness of the precision fluency shaping program controlling stuttering behaviour in adults

Barnard, Trudy Helga Maria.
Fonte: Brock University Publicador: Brock University
Tipo: Electronic Thesis or Dissertation
Português
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This study was done to test the effectiveness of the Precision Fluency Shaping Program in controlling stuttering behaviour in adults. Two sites were chosen, each using the Precision Fluency Shaping Program to treat stuttering. At each clinic, a Speech Patbologist made a random selection of the subjects' pre- and post-therapy video-taped interviews, totalling 20 in all. During the interviews, the clients were asked questions and re~d a short passage to determine the frequency of stuttering in natural conversation and in reading. Perceptions of Stuttering Inventory questionnaires vvere also filled in before and after therapy. Two judges were trained to identify stuttering behaviour, and were given an inter-rater reliability test at selected intervals throughout the study. Protocols",:m.a;d;6 of each interview tape, were scored for (a) stuttering behaviour and (b) words spoken or read. An Analysis of Variance Repeated Measures Test was used to compare before and after scores of conversations, readings, and Perceptions of Stuttering Inventory to determine whether the Precision Fluency Shaping Program controlled stuttering behaviour significantly. A Pearson R Correlation Test was also administered to determine if a relationship existed bet\veen Perceptions of Stuttering Inventory and (i) conversation and (ii) reading scores.

Avaliação da Taxa de Exposição em Exames Radiológicos Realizados em Procedimentos Cirúrgicos - Minimização dos Riscos em Indivíduos Ocupacionalmente Expostos

Branco, Isabela Soares Lopes
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Trabalho de Conclusão de Curso
Português
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This paper consists in the evaluation of the exposure rate to ionizing radiation to which professionals working in surgical procedures which require radiological examinations are subjected. Were initially performed real-time readings of exposure rate within four distinct operating rooms during the execution of four surgical procedures that made use of fluoroscopy equipment (including three orthopedic surgeries, one in the shoulder, one in the arm, another for deployment of metal pin in the leg region, and a fourth for vascular procedure); in these surgeries were used ionization chamber detector and an electrometer. In order to check the values achieved, was made a re-evaluation of the distribution of the rate of exposure to radiation, from the surgical procedures, now with thermoluminescent dosimeters (TLDs). For this, thirty TLDs were distributed in the operating rooms, arranged in points of interest as occupation by professionals. The TLDs were prepared for thirty consecutive days, after which they were removed and replaced with new dosimeters not exposed yet. The dosimeters were subjected to reading of the rate of exposure; this procedure was repeated for four months without interruption. The quantification of the results sought primarily to convert the rate of exposure for equivalent dose rate...

Significados psicológicos e culturais do comportamento alimentar de adoecidos crônicos por síndrome metabólica : um estudo clínico-qualitativo; Psychological and cultural meanings of eating behavior in chronic metabolic syndrome patients : a clinical-qualitative study

Carla Maria Vieira
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 30/06/2010 Português
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O comportamento alimentar é um tema relevante no tratamento da obesidade, dislipidemias, hipertensão, diabetes tipo II e outros agravos metabólicos crônicos. A associação de pelo menos três destes distúrbios tem sido reconhecida na literatura médica como Síndrome Metabólica, considerada um problema de saúde emergente. O objetivo desse estudo foi conhecer significados psicológicos e culturais do comportamento alimentar vinculados ao processo de adoecimento crônico por Síndrome Metabólica, de pessoas com excesso de peso, em situação de cuidado. Método Clínico Qualitativo foi aplicado em ambulatório de hospital universitário, na região sudeste do Brasil. Entrevistas individuais semidirigidas, conduzidas em profundidade com nove sujeitos portadores de Síndrome Metabólica, compuseram a amostra intencional fechada por critério de saturação. O corpus do trabalho composto pelas expressões verbais e não verbais foi analisado a partir do exercício de repetidas leituras flutuantes. Referencial psicodinâmico de base analítica complementado com contribuições da antropologia da alimentação apoiou a interpretação dos resultados organizados em oito categorias: 1- O corpo gordo estigmatizado: corpo sem saúde e sem beleza; 2- O fetiche da cirurgia para curar a obesidade; 3- O desejo contido: comer muito pode ser pouco para aplacar a fome de ordem emocional; 4- A conquista da autonomia: ressignificar a alimentação para a convivência com os sintomas da Síndrome Metabólica; 5- O estado depressivo e paralisante dos sujeitos com dificuldades para estabelecer o autocuidado; 6- Significados da dieta: a perda do prazer e da liberdade de comer; 7- Conquistas no manejo do tratamento a partir do enfrentamento de situações de vulnerabilidade; 8- Autonomia versus prescrição. Da discussão salientamos a rejeição à obesidade revelada pelos sujeitos que proporciona um desvio do foco no manejo do autocuidado...

Evaluation of physicochemical properties of enamel after application of different bleaching products= : Avaliação das propriedades físico-químicas do esmalte após diferentes tipos de clareamento; Avaliação das propriedades físico-químicas do esmalte após diferentes tipos de clareamento

Carlos Eduardo dos Santos Bertoldo
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 13/12/2013 Português
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A técnica de clareamento dental consiste em aplicar, sobre a superfície do esmalte, um gel que pode apresentar diferentes composições, mas que apresentam como princípio ativo o peróxido de hidrogênio. Há alguns anos, pesquisadores têm adicionado diferentes compostos químicos à composição visando diminuir os efeitos adversos causados pelo clareamento. Este estudo in vitro teve como objetivo avaliar as propriedades físico-químicas do esmalte dental após utilização de peróxido de hidrogênio com e sem cálcio e sequente aplicação do flúor neutro ou imersão em saliva artificial. Foram utilizados 40 blocos de esmalte e dentina (25mm2) obtidos de dentes incisivos bovinos que foram divididos em 4 grupos (n=10): G1- peróxido de hidrogênio (PH) a 35% com cálcio (Whiteness HP Blue/FGM) seguido da aplicação de flúor neutro a 2% por 2 minutos, G2 - PH a 35% com cálcio e armazenamento em saliva artificial por 7 dias, G3 - PH a 35% (Whiteness HP Maxx/FGM) seguido da aplicação de flúor neutro a 2% por 2 minutos, e G4 - PH a 35% e armazenamento em saliva artificial por 7 dias. Leituras de microdureza, rugosidade e composição química pela análise em EDS foram realizadas nos tempos: L1 - inicial, L2 - após a realização do clareamento e L3 após aplicação de flúor ou imersão em saliva artificial. Os dados obtidos foram submetidos a análise estatística pelo teste PROC MIXED de medidas repetidas...

Blood-retinal barrier permeability and its relation to progression of retinopathy in patients with type 2 diabetes. A four-year follow-up study.

Cunha-Vaz, JG; Leite, E; Sousa, JC; Faria de Abreu, JR
Fonte: Springer-verlag Publicador: Springer-verlag
Tipo: Artigo de Revista Científica
Publicado em //1993 Português
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Forty patients with late-onset diabetes (age at diagnosis 30 years or more) and minimal retinopathy as found by fundus photography were followed prospectively by repeated examination (baseline, 1 year, and 4 years). The study shows that early retinopathy changes are not permanent or invariably progressive. In the 1st year of follow-up microaneurysms worsened in 25%, improved in 10%, and remained stabilized in 65%. Vitreous fluorometry was able to detect an overall increase of 0.84 +/- 1.06 x 10(-6) min-1 in blood-retinal barrier (BRB) penetration ratios. After 4 years, 16 of the 40 patients had undergone photocoagulation (focal photo-coagulation in 11 and pan retinal photocoagulation in 5). The eyes that needed photocoagulation were the eyes that had higher fluorometry penetration ratios at the patient's entry into the study and showed a higher rate of deterioration during the 1st year of the study (5.54 +/- 1.97 vs 3.11 +/- 1.22 x 10(-6) min-1, P < 0.001, initial values; 1.52 +/- 0.76 vs 0.45 +/- 0.99 x 10(-6) min-1, P < 0.001, annual increase in leakage). The eyes that did not need photocoagulation, 24 out of 40, showed stable fluorometry readings within the 4-year period of follow-up (+0.02 +/- 0.98 10(-6) min-1). Abnormally high vitreous fluorometry values and their rapid increase over time appear to be good indicators of rapid progression and worsening of the retinopathy.

Intraocular pressure fluctuation in healthy and glaucomatous eyes: a comparative analysis between diurnal curves in supine and sitting positions and the water drinking test

Caiado,Rafael Ramos; Badaró,Emmerson; Kasahara,Niro
Fonte: Conselho Brasileiro de Oftalmologia Publicador: Conselho Brasileiro de Oftalmologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2014 Português
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Purpose: To compare intraocular pressure (IOP) using the simplified daily tensional curve (SDTC) between supine and sitting positions in terms of peak levels and amount of fluctuation in both, glaucomatous and healthy subjects. The secondary endpoint was the comparison of these measures with those derived from the water drinking test (WDT). Methods: Thirty patients with primary open-angle glaucoma (POAG) that were undergoing medical therapy and 30 healthy subjects were enrolled in this study. Each patient underwent a diurnal curve between 8 am and 4 pm. After lying down for 5 minutes, the IOP was measured with the Perkins tonometer. Patients were instructed to sit in the upright position for 5 minutes and the tonometry was repeated. At 4:15 pm, the WDT test was performed. Fluctuation was defined as the difference between the highest and the lowest IOP readings (range). The Student's t test was used to assess differences and a P value <0.05 was considered to be statistically significant. Results: The diurnal curve in the supine position demonstrated higher IOP average values (on average 3-4 mmHg higher) compared to the sitting position (p<0.0001) for both groups. IOP peaks were higher in the supine position; however, the IOP range was essentially the same between the three methods. Treated glaucomatous patients had higher IOP levels in all measurements...

Blood pressure in first 10 years of life: the Brompton study.

de Swiet, M.; Fayers, P.; Shinebourne, E. A.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 04/01/1992 Português
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OBJECTIVES--To determine the normal range of blood pressure and its pattern of change in the first 10 years of life. To estimate at what age (if any) children consistently appear in one part of the blood pressure distribution and at what age familial correlations in blood pressure become significant. DESIGN--Longitudinal cohort study. SETTING--South east England. SUBJECTS--2088 children of both sexes born consecutively in Farnborough Hospital, Kent, and their parents. MAIN OUTCOME MEASURE--Blood pressure measured by Doppler ultrasonography and sphygmomanometry. RESULTS--Systolic blood pressure rose from a mean of 88.5 mm Hg at age 6 months to 96.2 mm Hg at 8 years measured with a 8 cm cuff and from 89.1 mm Hg at age 5 years to 94.3 mm Hg at age 10 years measured with a 12 cm cuff. The larger cuff gave blood pressure readings about 6 mm Hg lower. This effect was independent of body weight and arm circumference. Diastolic blood pressure rose from 57.8 mm Hg at 5 years to 61.8 mm Hg at 10 years (12 cm cuff). There was only about 1 mm Hg difference between sexes. Blood pressure was correlated with weight, weight adjusted for height, height, and arm circumference at all ages studied. The correlation coefficient of repeated yearly measurements increased steadily with age from 0.28 at 2 years to 0.59 at 10 years. The correlation coefficients between child's blood pressure and mother's average blood pressure increased from 0.1 at age 1 year to 0.23 at age 10. CONCLUSIONS--Blood pressure changes relatively little between the ages of 6 months and 10 years. Yet because of the increasing strength of between occasion and family correlations...

BLOOD VOLUME IN WOUNDED SOLDIERS : I. BLOOD VOLUME AND RELATED BLOOD CHANGES AFTER HEMORRHAGE.

Robertson, Oswald H.; Bock, Arlie V.
Fonte: The Rockefeller University Press Publicador: The Rockefeller University Press
Tipo: Artigo de Revista Científica
Publicado em 31/01/1919 Português
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Blood volume tests made by the vital red method (Keith, Rowntree, and Geraghty) on patients after hemorrhage showed a marked reduction in the total blood bulk. Not uncommonly the blood volume was less than 60 per cent of the normal. The reduction after a certain point had been reached seemed to parallel the decrease in blood pressure. This relation of diminished blood volume to low pressure suggested a rough method of estimating blood volume from the change in blood pressure. By means of the blood volume and the hemoglobin per cent the actual amount of blood loss was determined. Cases of severe anemia showed a loss of as much as five-sixths of their total hemoglobin. Progressive changes in blood volume following hemorrhage were estimated in three ways: (1) repeated vital red tests; (2) calculation from changes in hemoglobin per cent produced by the injection of gum acacia; (3) calculation from changes in hemoglobin per cent following the dilution of the blood by the patient's own body fluids. The effects of the different methods of transfusion and of injection of gum acacia on blood volume were observed. No differences were apparent. It was found that transfusion and gum injections only partially restored the blood volume. Forced fluids by mouth were found to bring about its complete restoration in a comparatively short time. It was observed that the organism did not restore its blood volume beyond a certain point when a further increase in it would...

Echographic measurements of the retrobulbar optic nerve in normal and glaucomatous eyes

Beatty, S; Good, P; McLaughlin, J; O'Neill, E
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /01/1998 Português
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AIM—A study was designed to investigate whether measurements of the optic nerve diameter (OND) and cross sectional area (ONCSA), as measured by B-scan ultrasonography, are altered in glaucoma. The reproducibility and test-retest variability of echographic estimates of retrobulbar optic nerve dimensions was also tested.
METHODS—One eye of 49 glaucoma patients and 90 control subjects underwent five repeated echographic measurements of the maximal interpial diameter and cross sectional area of the orbital optic nerve on two separate occasions. All measurements were taken by one experienced ultrasonographer.
RESULTS—Mean optic nerve diameter (SD) for the control group was 2.86 (0.46) mm, and was independent of height (multiple regression analysis: p = 0.21), axial length (p = 0.74), spherical equivalent (p = 0.97), sex (ANOVA: p=0.36), or race (p=0.14), but was inversely related to age (p = 0.01). Reproducibility of OND readings in control subjects was 0.149 mm (coefficient of repeatability). Test-retest variability of interpial diameter was −0.02 (0.29) mm. Mean interpial diameter of the optic nerve was significantly smaller among glaucomatous eyes (2.58 (0.501) mm) than controls (Mann-Whitney U test: p < 0.0001). Glaucomatous optic nerves also had a significantly smaller cross sectional area (6.68 (2.58) mm2) than those of healthy volunteers (8.25 (1.67) mm2) (p = 0.004).
CONCLUSION—Echographic measurements of the orbital optic nerve are highly reproducible and not subject to clinically meaningful test-retest variability. Optic nerve interpial diameter and cross sectional area are reduced in glaucomatous eyes...

Variability in Dengue Titer Estimates from Plaque Reduction Neutralization Tests Poses a Challenge to Epidemiological Studies and Vaccine Development

Salje, Henrik; Rodríguez-Barraquer, Isabel; Rainwater-Lovett, Kaitlin; Nisalak, Ananda; Thaisomboonsuk, Butsaya; Thomas, Stephen J.; Fernandez, Stefan; Jarman, Richard G.; Yoon, In-Kyu; Cummings, Derek A. T.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 26/06/2014 Português
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Plaque Reduction Neutralization Tests (PRNTs) remain the most popular approach to characterize an individual's ability to neutralize dengue viruses and are widely used in both epidemiological studies and vaccine trials. However, the underlying variability in the assay is poorly understood, hindering the interpretation of PRNT titer estimates. Further, there is little standardization of its use across laboratories limiting our ability to compare results across settings. Here we used many repeated experiments on the same serum under identical laboratory conditions to estimate the variance in titer measurements. We also identified both the optimum PRNT evaluation point and statistical model to calculate titers. By providing an estimate of the variability in the assay, laboratories will be able to provide a confidence bound on individual PRNT readings. In addition by providing recommended statistical approaches that could be used across laboratories, our findings will help the standardization of the assay across settings.

Present Status of Corneal Contact Lenses in Medical Practice

Pratt-Johnson, John A.; Warner, David M.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 29/08/1964 Português
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Common indications for and contraindications to corneal contact lens wear are outlined. The processes of adaptation of the cornea to a correctly fitted contact lens are described. Biomicroscopic examination of the cornea revealed that 29 of 250 eyes in the authors' series showed small abrasions at some time during the fitting period. The dangers of infection of a simple corneal abrasion by such pathogens as Pseudomonas aeruginosa are stressed. Prophylactic treatment of abrasions with a topical antibiotic preparation containing polymyxin is recommended. Serious criticism is levelled at the practice of estimating the fit of a contact lens by the fluorescein pattern only, and repeated keratometry readings combined with biomicroscopy are considered to be essential. It is proposed that the evaluation, fitting and after-care of the contact lens patient should be the responsibility of an ophthalmologist.

Orthostatic haemodynamic responses in acute stroke

Panayiotou, B; Reid, J; Fotherby, M; Crome, P
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /04/1999 Português
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Little is known about orthostatic blood pressure regulation in acute stroke. We determined postural haemodynamic responses in 40 patients with acute stroke (mild or moderate severity) and 40 non-stroke control in-patients, at two days (`Day 1') and one week (`Week 1') post-admission. Following a 10-minute supine rest and baseline readings, subjects sat up and blood pressure and heart rate were taken for 5 minutes. The procedure was repeated with subjects moving from supine to the standing posture. Haemodynamic changes from supine data were analysed. On standing up, the control group had a transient significant fall in mean arterial blood pressure on Day 1 but not Week 1. No significant changes were seen on either day when sitting up. In contrast to controls, the stroke group showed increases in mean arterial blood pressure on moving from supine to the sitting and standing positions on both days. Persistent postural hypotension defined as ⩾20 mmHg systolic fall occurred in <10% of either of the study groups on both days. Sitting and standing heart rates in both groups were significantly faster than supine heart rate on both days. The orthostatic blood pressure elevation is consistent with sympathetic nervous system overactivity which has been reported in acute stroke. Upright positioning as part of early rehabilitation and mobilisation following mild-to-moderate stroke would...

Data fusion for automated non-destructive inspection

Brierley, N.; Tippetts, T.; Cawley, P.
Fonte: The Royal Society Publishing Publicador: The Royal Society Publishing
Tipo: Artigo de Revista Científica
Publicado em 08/07/2014 Português
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In industrial non-destructive evaluation (NDE), it is increasingly common for data acquisition to be automated, driving a recent substantial increase in the availability of data. The collected data need to be analysed, typically necessitating the painstaking manual labour of a skilled operator. Moreover, in automated NDE a region of an inspected component is typically interrogated several times, be it within a single data channel due to multiple probe passes, across several channels acquired simultaneously or over the course of repeated inspections. The systematic combination of these diverse readings is recognized to offer an opportunity to improve the reliability of the inspection, but is not achievable in a manual analysis. This paper describes a data-fusion-based software framework providing a partial automation capability, allowing component regions to be declared defect-free to a very high probability while readily identifying defect indications, thereby optimizing the use of the operator's time. The system is designed to applicable to a wide range of automated NDE scenarios, but the processing is exemplified using the industrial ultrasonic immersion inspection of aerospace turbine discs. Results obtained for industrial datasets demonstrate an orders-of-magnitude reduction in false-call rates...

Classification of thoracic and lumbar spine fractures: problems of reproducibility: A study of 53 patients using CT and MRI

Oner, F.; Ramos, L.; Simmermacher, R.; Kingma, P.; Diekerhof, C.; Dhert, W.; Verbout, A.
Fonte: Springer-Verlag Publicador: Springer-Verlag
Tipo: Artigo de Revista Científica
Português
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Reproducibility of fracture classification systems in general has been a matter of controversy. The reproducibility of spinal fracture classifications has not been sufficiently studied. We studied the inter-observer and intra-observer reproducibility of the Magerl (AO) classification using radiograms, CTs and MRIs of 53 patients. We compared this classification with the older and simpler Denis classification. Five observers classified the fractures, first using the radiograms and CTs and, 6 weeks later, with radiograms and MRIs. Three of the observers repeated the readings after 3 months. Three observers also classified the fractures according to Denis. Agreement was measured using Cohen's κ test. The type (A, B, C) classification of the AO system was fairly reproducible with CTs. With MRI this was only moderate. Group subclassification of the types yielded higher κ values, corresponding to substantial agreement. The agreement was, in general, better with the Denis classification, but the variance was higher due to the difficulty of finding proper categories for some injury patterns. Although the AO classification allows proper registration of all kinds of injury, the reproducibility, especially at the type level, is problematic. Use of MRI and better definition of the distinctive properties of the three different types may enhance the reproducibility of the scheme.

La política en los miedos de los medios y el refuerzo periodístico de estereotipos sociales : tratamiento electoral de la Izquierda en diarios cordobeses y argentinos (1999-2005)

Paz García, Ana Pamela
Fonte: Universidade Autônoma de Barcelona Publicador: Universidade Autônoma de Barcelona
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em //2013 Português
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Con frecuencia, en la cobertura periodística de procesos políticos algunos estereotipos sociales traman una deliberada ausencia o invisibilización de ciertos dirigentes y partidos, o bien emergen en la exposición discrecional y reiterada de actores o propuestas reforzando lecturas contextuales específicas. Desde los aportes de la crítica ideológica, la sociología y la psicología política al estudio interdisciplinario del discurso, analizo cómo en la interpretación y toma de posicionamiento frente a los acontecimientos que permean cualquier información ofrecida por la prensa, la visión del escenario, los actores, los problemas en juego y ciertos miedos culturales son factores clave de un enmarcamiento intencionado de la agenda electoral. En términos teóricos, establezco una conexión analítica entre conceptos más abstractos como imaginario o representaciones sociales y nociones más operativas como estereotipos e ideología, recuperando el valor de su interrelación desde una perspectiva socio-psico-política sobre las instancias de circulación del discurso mediático en las democracias contemporáneas.; Frequently in the news coverage of political processes, some social stereotypes weave a deliberate absence or invisibility of certain leaders and parties...

A Repetition of the Michelson-Morley Experiment Using Kennedy's Refinement

Illingworth, K. K.
Fonte: Instituto de Tecnologia da Califórnia Publicador: Instituto de Tecnologia da Califórnia
Tipo: Article; PeerReviewed Formato: application/pdf
Publicado em /11/1927 Português
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The ether drift experiment as performed by Kennedy with a reduced optical system in helium has been repeated with the same apparatus somewhat modified and the same results obtained. The interferometer has been improved by resilvering the mirrors so that 1/1500 of a fringe shift could be detected by an observer with good eyes, and 1/500 by an observer with poorer eyes. Additional readings, which eliminate steady thermal shifts of the fringes, have been made and these show no ether drift to an accuracy of about one kilometer per second.

Notes on the applicability of the BENEDICT-THEIS method for the determination of inorganic phosphorus in equine blood by FISHER's electrophotometer; Notas sobre o emprego do método de Benedict-Theis na determinação do fósforo inorgânico do sangue dos equinos, pelo eltro-fotômetro de Fisher

Bonoldi, Virgílio; Andreasi, Fernando
Fonte: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia Publicador: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 15/06/1948 Português
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With the purpose of both traces the behaviour and to get acquainted with the particular technic of the BENEDICT-THEIS method in the FISHER’s electro-photometer, method preconized for the determination of inorganic phosphates in the blood, the AA., employing equine serum, made a series of determinations repeated in the same serum. After this they proceeded with the recovery test, adding different amounts of the phosphate solution to equal volume of the same serum, following the criterion generally adopted in such works. From the determinations obtained under the conditions in which they were performed, the AA. concluded that there is necessity of taking the readings soon after the color development, observing closely the procedure indicated to find the calibration factor. It was stated that the method answers satisfactory against the coefficient of variability, but, negatively to the recovery test, because according to T-test estimation, the results differ from the theoric ones with significance. They raise the supposition that the recovery fails due to the cautions demanded relatively to the time of color development and posterior cooling or inconsequence of one or various factors concerning the agreement of the method, in LAMBERT-BEER’s law.; Os autores...