Search results for "Experimental"
showing 10 items of 18236 documents
Measuring and Modelling Evaporation Losses from Wet Branches of Lemon Trees
2022
Evaporation losses of rainfall intercepted by canopies depend on many factors, including the temporal scale of observations. At the event scale, interception is a few millimetres, whereas at a larger temporal scale, the number of times that a canopy is filled by rainfall and then depleted can make the interception an important fraction of the rainfall depth. Recently, a simplified interception/evaporation model has been proposed, which considers a modified Merrian model to compute interception during wet spells and a simple power-law equation to model evaporation from wet canopy during dry spells. Modelling evaporation process at the sub hourly temporal scale required the two parameters of …
Some recent results on the compressive and flexural behaviour of composite members
2005
Experiemntal results from compression and flexural tests on steel tubulare columns having circular or rectangular transverse cross-section and infilled with plain or fiber reinforced concrete (FRC) are analysez. for composite members differenti lengths and different dimensions of transverse cross-section were considered in order to assess the influence on behavior in flexure and in compression.The fiber investigated with different percentage were syntetic, carbon and deformed steel fibers. The constituent materials were characterised through compressive and split tests on conconcrete cylinders. Load.shortning and load-delection curves were determined including the sotnening response. Simpli…
Normal pressures and frictional tractions on shallow conical hopper walls after concentric filling: Predictions and experiments
2013
Author's version of an article in the journal: Chemical Engineering Science. Also available from the publisher at: http://dx.doi.org/10.1016/j.ces.2012.11.028 A silo with a shallow hopper is designed to achieve the required silo capacity when the headroom available is limited, provided that the issue of segregation of stored particulate solids is not a problem. Several analytical models have been proposed to try to predict the design loads for such shallow silo hoppers to guarantee their structural integrity. In this study, a novel finite element analysis has been conducted to explore the development of pressures and tractions on the wall of a full scale shallow hopper when it is filled wit…
Numerical and Experimental Study of Friction Loss in Hydrostatic Motor
2012
Published version of an article in the journal: Modeling, Identification and Control. Also available from the publisher at: http://dx.doi.org/10.4173/mic.2012.3.2 Open access This paper presents a numerical and experimental study of the losses in a hydrostatic motor principle. The motor is designed so that the structural deflections and lubricating regimes between moving surfaces and, subsequently, the leakage and friction losses, can be controlled during operation. This is done by means of additional pressure volumes that influence the stator deflection. These pressures are referred to as compensation pressures and the main emphasis is on friction or torque loss modeling of the motor as a …
Educación artística : revista de investigación
2014
En este articulo mostramos como aprender, ensenar y comunicarnos a traves del arte, especialmente del arte contemporaneo en la formacion de profesionales de la educacion, nos lleva a concretar propuestas docentes creativas para que los profesionales de la educacion seamos capaces de imaginar formas distintas de ensenar y aprender. Nuestros anos de experiencia y de conocimiento sobre ella nos llevan a cuestionar: ?Por que en el mundo de la educacion estan tan arraigados algunos modelos docentes??Por que se habla tanto de la necesidad del cambio y cuesta tanto su implementacion y sobretodo su continuidad? Y por tanto ?de que manera podemos articular los espacios formativos para deconstruir y…
Students’ approaches to solving R-FCI tasks observed by eye-tracking method
2018
This study sought to assess the representational format of task options in the representational variant of the force concept Inventory (R-FCI) test, namely its impact on students’ problem-solving approaches. This was done with the help of eye-tracking equipment. 35 high-school students solved four tasks, mainly from the R-FCI test, which sought to assess the student’s understanding of Newton’s 1st and 2nd Law of Motion. As they were trying to solve the problems, their gazes were tracked by TobiiTX300. A comparison between students who provided the correct and incorrect answer was subsequently carried out. The correctly answering students very quickly found the correct solution both in verba…
Facsimile : The Makings of the Similar in Graham Rawle’s Collage Novel Woman’s World
2016
This article reads Graham Rawle's collage novel Woman's World (2005) by utilizing the literal and metaphoric meanings of the facsimile as critical tools. Woman's World is an assemblage of circa 40,000 fragments cut and pasted from over a 1000 copies of British women's magazines of the early 1960s. These snippets are reproduced in facsimile and thus feature a jerky variety of font types, cases, and sizes. Woman's World does not only present a facsimile of its found graphic materials but it also studies, in my reading, the "facsimile" (similarizing, imitating, copying) qualities of gender identification, adopted discourses, (cross-)dressing, and the novel's own construction. The "varieties of…
Evaluación de estrategias terapéuticas basadas en sustancias antiinflamatorias y antioxidantes en retinosis pigmentaria
2020
La retinosis pigmentaria comprende un grupo de distrofias hereditarias de retina, caracterizadas por la pérdida progresiva e irreversible de la visión, debida a la muerte de las células fotorreceptoras. Se trata de una enfermedad rara, que constituye la principal causa genética de ceguera, con una prevalencia de un afectado por cada 4000 habitantes. Mientras que la degeneración retiniana empieza con la muerte de los bastones debida a mutaciones genéticas, la muerte de los conos parece ser consecuencia de un progresivo daño oxidativo, inflamación y desequilibrio metabólico, influenciado por la liberación de sustancias tóxicas por parte de los bastones y otras células del entorno. La muerte d…
Flavour release at the interfaces of stirred fruit yoghurt models
2006
Abstract Model matrices consisting of a pectin and a dairy gel were investigated to study the transfer of flavour compounds between the different phases of stirred fruit yoghurt. Using a full factorial experimental design, different parameters (storage temperature, initial flavour concentration in the pectin gel and fat content of the dairy gel) were studied. The kinetics of the migration of flavour compounds between the two gels were investigated using a novel SPME method, where a Carboxen/Polydimethylsiloxane fibre was directly inserted into the pectin gel. Flavour compounds were predominantly retained in the pectin gel and thus, the presence of fat in the dairy gel did not affect their t…
Antibacterial effect of a new haemostatic agent on oral microorganisms
2011
Objective: The purpose of this study was to determine the antibacterial effect of a newly developed haemostatic agent Ankaferd Blood Stopper® (ABS) and Ferric Sulphate (FS) on various oral microorganisms. Study design: Bacterial strains were freshly incubated in their specific broth media. For each of the strains, 3 wells per each agent, with a 5 mm diameter were made under aseptic conditions in the specific agar media. Then they were filled with a test agents or 0.2% chlorhexidine digluconate (CHX) (control group). After 24h and 48h incubation periods, inhibition zones were measured. Results: ABS showed antibacterial effect on all test microorganisms except Lactobacillus acidophilus and La…