Mixing behaviour of side injection of air jets and gaseous fuel jets into the axial flow of tunnel kilns

Otto-von-Guericke-Universität Magdeburg, Fakultät für Verfahrens- und Systemtechnik, Dissertation, 2016

Espesor retinalcentral en pacientes con miopía axial de 18 a 40 años de la ciudad de Bogotá, Colombia 2012-2014

Tesis (Maestría en Ciencias de la Visión).-- Universidad de La Salle. Maestría en Ciencias de la Visión, 2014

Analysis of the moisture effect on the mechanical behaviour of an adhesively bonded joint under proportional multi-axial loads

The objective of the study is to identify the 3D behaviour of an adhesive in an assembly, and to take into account the effect of ageing in a marine environment. To that end, three different tests were employed. Gravimetric analyses were used to determine the water diffusion kinetics in the adhesive. Bulk tensile tests were performed to highlight the effects of humid ageing on the adhesive behaviour. Modified Arcan tests were performed for several ageing times to obtain the experimental database which was necessary to identify constitutive models. A Mahnken-Schlimmer type model was determined for the unaged state according to a procedure developed in a previous study. This identification used inverse techniques. It was based on the unaged modified Arcan results and on a coupling between an optimisation routine and finite-element analysis. Then, a global inverse identification procedure was developed. Its aim was to relate the unaged parameters to the moisture concentration and overcome the difficulties usually associated with ageing of bonded assemblies in a humid environment: a non-uniformity of the stress state and a gradient of mechanical properties in the adhesive. This procedure was similar to the one used in the first part but needed modified Arcan results for several ageing times. It also required an initial assumption for the evolution of the Mahnken-Schlimmer parameters with the moisture concentration.

Resistência de Materiais - Esforço axial

Tendo sido interrompido, a partir do ano lectivo de 2015/2016, o 1º Ciclo do Curso de Engenharia Civil, o autor resolveu reunir toda a informação que foi disponibilizada aos alunos da disciplina de Resistência de Materiais, durante os 8 anos em que o curso funcionou na Universidade de Évora. O presente trabalho versa o tema do Esforço axial da Resistência de Materiais e é uma edição revista e acrescentada das edições que foram publicadas em 2013; 2009 e 2008. No curso, a disciplina de Resistência de Materiais tinha a duração de um único semestre (4º semestre), pelo que foi necessário selecionar os temas mais relevantes a ensinar sobre Esforço axial. Nos diversos pontos deste trabalho são apresentados os aspectos formais importantes, completados com problemas resolvidos e não resolvidos de aplicação. No último ponto estão incluídos todos os exercícios de aplicação sobre Esforço axial abordados nas aulas práticas e os que foram alvo de avaliação nas provas de frequência e de exame.

Rapid hydrothermal cooling above the axial melt lens at fast-spreading mid-ocean ridge

Axial melt lenses sandwiched between the lower oceanic crust and the sheeted dike sequences at fast-spreading mid-ocean ridges are assumed to be the major magma source of oceanic crust accretion. According to the widely discussed "gabbro glacier'' model, the formation of the lower oceanic crust requires efficient cooling of the axial melt lens, leading to partial crystallization and crystal-melt mush subsiding down to lower crust. These processes are believed to be controlled by periodical magma replenishment and hydrothermal circulation above the melt lens. Here we quantify the cooling rate above melt lens using chemical zoning of plagioclase from hornfelsic recrystallized sheeted dikes drilled from the East Pacific at the Integrated Ocean Drilling Program Hole 1256D. Weestimate the cooling rate using a forward modelling approach based on CaAl-NaSi interdiffusion in plagioclase. The results show that cooling from the peak thermal overprint at 1000-10506 degrees C to 6006 degrees C are yielded within about 10-30 years as a result of hydrothermal circulation above melt lens during magma starvation. The estimated rapid hydrothermal cooling explains how the effective heat extraction from melt lens is achieved at fast-spreading mid-ocean ridges.

Investigating the role of fan club membership on perceptions of team brand equity in football

Researchers have suggested that brand equity is vital for professional sport teams by focusing on the examination of sport fans in general. The current study aims to examine the differences in team brand equity perceptions between fan club members and nonmembers, and the predictive role of brand equity dimensions on behavioral intentions. Data were collected from fans of a professional football league (n = 2287) with an adapted version of the spectator-based brand equity scale. The results gathered through a confirmatory factor analysis provide evidence of fair psychometric properties of the measurement scale. A multi-group CFA analysis showed factorial stability of the model in both groups, while the latent mean comparisons revealed significant differences in the dimensions of brand mark, social interaction, commitment, team history, organizational attributes, team success, head coach, management, stadium, and internalization. In addition, a multi-group SEM analysis revealed that the relationships between brand equity dimensions and behavioral intentions are not significantly different among the groups. Social interaction, team success and internalization were the significant positive predictors of behavioral intentions among the overall sample. These findings highlight the importance of studying different types of consumers and suggest managerial implications, such as the need for clubs to establish reciprocal relationships with fans in order to increase their levels of internalization and contribute to increased behavioral intentions.

Experimental study on the impact of using a fan coil in the evaluation of contaminant removal effectiveness of common air diffusion strategies

Indoor Air 2016 - The 14th International Conference Indoor Air Quality and Climate

Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland

Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic suc- cession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river fun- ctioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni- to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.

Uso de tomografía axial computarizada cerebral en pacientes con primer evento de convulsión, que consultan en la unidad de emergencia del Hospital Nacional de Niños Benjamín Bloom desde Enero de 2009 a Diciembre de 2013

El objetivo general es establecer cuáles son los criterios clínicos o de laboratorio utilizados en la unidad de emergencia del Hospital de Nacional de Niños Benjamín Bloom para realizar una tomografía axial computarizada cerebral en pacientes de las edades de 1 mes a 12 años que presentan una primera convulsión en el periodo de enero de 2009 a diciembre de 2013. Método y diseño: descriptivo, retrospectivo, transversal; la población del estudio son niños de 1 mes a 12 años con primer evento de convulsión afebril y sin signos de focalización, quienes consultaron a la unidad de emergencia, durante periodo de enero de 2009 a diciembre de 2013, en donde se encontró un total de 27 pacientes que se tomaron en cuenta para el estudio. La tomografía cerebral computarizada es un procedimiento de neuroimágen usado en algunas ocasiones en los pacientes con primera crísis convulsiva, por tal motivo ya se crearon algunos protocolos y normas para su uso. Se plantea la siguiente pregunta de investigación: ¿Es necesario el uso de tomografía computarizada cerebral en el primer evento convulsivo generalizado en la edad pediátrica? Los resultados encontrados en éste estudio se correlaciona con los hallazgos reportados en la literatura internacional en los cuales las tomografías realizadas encontraron una incidencia del 10% de alteraciones anatómica.

Axial buckling load of partially encased columns under fire

Partially encased columns have significant fire resistant. However, it is not possible to assess the fire resistance of such members simply by considering the temperature of the steel. The presence of concrete increases the mass and thermal inertia of the member and the variation of temperature within the cross section, in both the steel and concrete components. The annex G of EN1994-1-2 allows to calculate the load carrying capacity of partially encased columns, for a specific fire rating time, considering the balanced summation method. New formulas will be used to calculate the plastic resistance to axial compression and the effective flexural stiffness. These two parameters are used to calculate the buckling resistance. The finite element method is used to compare the results of the elastic critical load for different fire ratings of 30 and 60 minutes. The buckling resistance is also calculated by the finite element method, using an incremental and iterative procedure. This buckling resistance is also compared with the simple calculation method, evaluating the design buckling curve that best fits the results.

Highly polymorphic microsatellite markers for the Mediterranean endemic fan mussel Pinna nobilis

Pinna nobilis is an endemic bivalve of the Mediterranean Sea whose populations have decreased in the last decades due to human pressure; as a consequence, it was declared a protected species in 1992. Despite its conservation status, few genetic studies using mitochondrial markers have been published. We report on the isolation and development of 10 microsatellite loci for the fan mussel, Pinna nobilis. All loci (2 di-nucleotide, 5 tri-nucleotide, 2 tetra-nucleotide and 1 penta-nucleotide) are characterized by high levels of polymorphism in 76 individuals tested from two populations in the Balearic Islands (Spain, Western Mediterranean Sea). The number of alleles ranged from 4 to 24 and expected heterozygosity ranged from 0.4269 to 0.9400. These microsatellites could be very useful for the assessment of the genetic diversity and connectivity patterns of P. nobilis and the establishment of new conservation strategies.

Lattice pulling effect and strain relaxation in axial (In, Ga)N/GaN nanowire heterostructures grown on GaN-buffered Si(111) substrate

Transmission electron microscopy and spatially resolved electron energy-loss spectroscopy have been applied to investigate the indium distribution and the interface morphology in axial (In,Ga)N/GaN nanowire heterostructures. The ordered axial (In,Ga)N/GaN nanowire heterostructures with an indium concentration up to 80% are grown by molecular beam epitaxy on GaN-buffered Si(111) substrates. We observed a pronounced lattice pulling effect in all the nanowire samples given in a broad transition region at the interface. The lattice pulling effect becomes smaller and the (In,Ga)N/GaN interface width is reduced as the indium concentration is increased in the (In,Ga)N section. The result can be interpreted in terms of the increased plastic strain relaxation via the generation of the misfit dislocations at the interface.

Short-term and long-term changes in corneal power are not correlated with axial elongation of the eye induced by orthokeratology in children

PURPOSE: To assess the relationship between short-term and long-term changes in power at different corneal locations relative to the change in central corneal power and the 2-year change in axial elongation relative to baseline in children fitted with orthokeratology contact lenses (OK). METHODS: Thirty-one white European subjects 6 to 12 years of age and with myopia −0.75 to −4.00 DS and astigmatism ≤1.00 DC were fitted with OK. Differences in refractive power 3 and 24 months post-OK in comparison with baseline and relative to the change in central corneal power were determined from corneal topography data in eight different corneal regions (i.e., N[nasal]1, N2, T[temporal]1, T2, I[inferior]1, I2, S[superior]1, S2), and correlated with OK-induced axial length changes at two years relative to baseline. RESULTS: After 2 years of OK lens wear, axial length increased by 0.48±0.18 mm (P0.05). CONCLUSION: The reduction in central corneal power and relative increase in paracentral and pericentral power induced by OK over 2 years were not significantly correlated with concurrent changes in axial length of white European children.