977 resultados para Bean pick-up machine


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Thesis (D.M.A.)--University of Washington, 2016-06

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Trabalho de Projeto apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ciências da Educação: área de especialização em Supervisão Pedagógica realizado sob a orientação científica de Professor Doutor João Carlos Gouveia

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Symbiotic relationships between insects and beneficial microbes are very common in nature, especially within the Hemiptera. The brown marmorated stink bug, Halyomorpha halys Stål, harbors a symbiont, Pantoea carbekii, within the fourth region of the midgut in specialized crypts. In this dissertation, I explored this insect- microbe relationship. I determined that the brown marmorated stink bug is heavily reliant on its symbiont, and that experimental removal of the symbiont from the egg mass surface prior to nymphal acquisition led to lower survival, longer development, lower fecundity, and aberrant nymphal behavior. Additionally, I determined that even when the symbiont is acquired and housed in the midgut crypts, it is susceptible to stressors. Stink bugs reared at a higher temperature showed lower survival, longer development, and a cease in egg mass production, and when bugs were screened for their symbiont, fewer had successfully retained it while under heat stress. Finally, with the knowledge that the stink bug suffers decreases in fitness when its symbiont is missing or stressed, I wanted to determine if targeting the symbiont was a possible management technique for the stink bug. I tested the efficacy of a number of different insecticidal and antimicrobial products to determine whether prevention of symbiont acquisition from the egg mass was possible, and results indicated that transmission of the symbiont from the egg mass to the newly hatched nymph was negatively impacted when certain products were applied (namely surfactants or products containing surfactants). Additionally, direct effects on hatch rate and survival were reported for certain products, namely the insect growth regulator azadirachtin, which suggests that nymphs can pick up residues from the egg mass surface while probing for the symbiont. I conclude that P. carbekii plays a critically important role in the survival of its host, the brown marmorated stink bug, and its presence on the egg mass surface before nymphal hatch makes it targetable as a potential management technique.

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The majority of research work carried out in the field of Operations-Research uses methods and algorithms to optimize the pick-up and delivery problem. Most studies aim to solve the vehicle routing problem, to accommodate optimum delivery orders, vehicles etc. This paper focuses on green logistics approach, where existing Public Transport infrastructure capability of a city is used for the delivery of small and medium sized packaged goods thus, helping improve the situation of urban congestion and greenhouse gas emissions reduction. It carried out a study to investigate the feasibility of the proposed multi-agent based simulation model, for efficiency of cost, time and energy consumption. Multimodal Dijkstra Shortest Path algorithm and Nested Monte Carlo Search have been employed for a two-phase algorithmic approach used for generation of time based cost matrix. The quality of the tour is dependent on the efficiency of the search algorithm implemented for plan generation and route planning. The results reveal a definite advantage of using Public Transportation over existing delivery approaches in terms of energy efficiency.

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El objetivo principal del presente estudio consistió en evaluar la existencia o no de disciplina de mercado en el sistema bancario costarricense lo cual puede ser una evidencia importante previo al posible establecimiento de un Fondo de Garantía de los depósitos bancarios en Costa Rica.De acuerdo con los resultados de las estimaciones, podría afirmarse que la hipótesis de la existencia de disciplina de mercado en el sistema bancario costarricense se comprobó aunque de una manera muy débil o incipiente.La mayor parte de las variables fundamentales del desempeño y que reflejan el nivel de riesgo asumido por los intermediarios bancarios no parecen tener influencia sobre el comportamiento de los depósitos al igual que con la mayoría de las variables macroeconómicas.Los resultados también indican que la captación en cada uno de los bancos comerciales, si bien reacciona de igual manera ante los cambios en las variables explicativas, cada una de las instituciones presenta ciertas particularidades que los hacen diferentes entre sí. AbstractThe primary target of the present study consisted of evaluating the existence or not of market discipline in the Costa Rican banking system which can be previous an important evidence to the possible establishment of a guarantee system of the banking deposits in Costa Rica.In agreement with the results of the estimations, it could affirm that the hypothesis of the existence of market discipline in the Costa Rican banking system was verified although of a very weak or incipiente way.Most of the fundamental variables of the performance and that they reflect the level of risk assumed by the banking intermediaries does not seem to have influence on the behavior of the deposits like with most of the macroeconomic variables.The results also indicate that the pick up of funds in each one of the commercial banks, although reacts of equal way before the changes in the explanatory variables, each one of the institutions displays certain characteristics that are reflected in different intercepts.

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O aumento da carga física do jogo de futebol provocou uma maior exigência e desenvolvimento na condição física dos jogadores e por inerência, nos árbitros. Assim o presente estudo procurou identificar e desenvolver um teste para a avaliação dos árbitros de futebol. Foi realizada uma análise sistemática para identificação e descrição da produção científica na área da arbitragem no sentido de sustentar o argumento de insuficiência dos testes vigentes e propor o novo teste que denominámos ETSOR. Após esta, foi realizada uma aplicação piloto com recurso ao método de estudo de caso para testagem do ETSOR. Os resultados revelaram que existe uma dispersão nas formas e conteúdos abordados face à caracterização do árbitro de futebol de 11. A partir do método de meta-análise, é apresentada uma proposta de categorização dos conteúdos. Os resultados revelaram também que o teste FIFA não identifica as intensidades irregulares que decorrem das situações do jogo, nem representa a uma distribuição das intensidades dos esforços dos árbitros nas situações de jogo. O Teste ETSOR, como teste ecológico, capta em termos de densidade, de distribuição, de variação da potência e de resistência, os esforços dos árbitros nas situações de jogo, como testa a características das intensidades máximas da atividade do árbitro. Por último, os resultados reforçaram que este processo que se deve estender de forma periodizada ao longo de cada época tornando-se útil, na medida em que permite a otimização e monitorização da prestação do árbitro.

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En estos últimos años a raíz de la crisis económica que supuso una gran desaceleración económica, las entidades públicas han sufrido grandes cambios tanto en su situación económica como en la financiera teniendo que ajustar sus presupuestos. Este trabajo se basa en analizar la situación presupuestaria del Ayuntamiento de Bilbao en el periodo 2010-2013 mediante la recogida de datos económicos y analizando los presupuestos de gastos y de ingresos de dicha entidad. Para ello, se van a recoger los componentes del presupuesto: como se ha financiado (Clasificación Económica del Ingreso), la estrategia de actuación (Ejes Estratégicos), en que se ha utilizado el gasto (Clasificación Económica del Gasto) y para que se ha llevado a cabo (Clasificación Funcional del Gasto) y por ultimo quien ha ejecutado el gasto (Clasificación Orgánica). Además, se va a analizar la ejecución presupuestaria, el resultado presupuestario, el remanente de tesorería y la ejecución presupuestaria, así como otras variables presupuestarias.

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Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Fisioterapia

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Con el fin de identificar la situación actual acerca del manejo y tratamien­to de los desechos en los municipios de la Región Brunca de Costa Rica y debido a la importancia que este problema tiene a escala nacional, producto de la inexperiencia y la poca educación existente acerca de los mecanismos para enfrentarlo, se realizó la presente investigación, que contempló una etapa de campo en la cual se visitaron los seis cantones de la Región, para obtener información administrativa y visitar los lugares donde actualmente se deposita la basura. Esto permitió confirmar que todos los municipios regionales tienen serios problemas para enfrentar el compromiso de recolectar y manejar los desechos que se producen en su cantón. La falta de censos y tarifas actualizadas limitan la posibilidad de planificar estrategias y tomar decisiones al respecto, y su antiguo modelo de recolección ha colapsado, por lo que las municipalida­des requieren de capacitación y asesoría para enfrentar el problema. Capacitación, educación, financiamiento, separación y reciclaje, son algunas de las acciones requeridas para enfrentar la situación. ABSTRACT This study was carried out identify the current situation of garbage management and treatment in Costa Rica's southern Brunca Región, since this problem achieves national proportions resulting from lark of experience and education on the ways to face it. The study included field research in the six counties of the región to obtain information on the administration of the garbage and garbage disposal sites themselves. This enabled us to confirm that the region's municipalities (local governments) actually have serious problems in their commitment to pick up and manage garbage. The shortage of census and up-dated fares restrict their chances to plan strategies and make significant decisions. In addition, their obsolete garbage disposal systems have collapsed. Consequently, the municipalities require training and advising, together with funding, education, garbage sorting techniques and recycling methods for them to face the problem properly.

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During pressure filtration, the filter cake can experience deformation. When the filter cake exhibits elastic rheological behaviour, it expands while the pressure is released and, if adjacent liquid is present, re-wetting may occur. Such an expanding filter cake can pick up liquid already removed, worsening solid-liquid separation performances. Undesired phenomena such as filter cake re-wetting run contrary to solid-liquid separation performances and, specifically, to the separation target of obtaining a high dry solid content. At the industrial level, even a small quantity of liquid that can be additionally removed is beneficial. Re-wetting phenomenon is investigated using two different limestone materials and different filters and felts, respectively. Water storage capacity of filters and felts and elastic properties of filters, felts, and filter cakes are investigated. The elastic tests performed show that the filters and the felts are non-linear viscoelastic materials and can have a potential for re-wetting, while the limestone filter cakes are not showing measurable elastic deformation under decompression. However, during a filtration test an additional felt layer placed under the filter seems to result in a slightly higher cake dryness, i.e., an increase of the cake dryness by around 1% only. This difference may not be attributed to the re-wetting effect.

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In a recent article, Hunter uses the late George Varley and George Gradwell’s long-term data on the winter moth (Operophtera brumata) and green tortrix (Tortrix viridana) populations to propose a method of quantifying the relative importance of top-down effects (because of natural enemies) and bottom-up effects (because of resource competition) in influencing population dynamics. We believe this approach is deeply flawed. Using Varley and Gradwell’s winter moth study, we show that the problems with Hunter’s analysis lie in his misinterpretation of the population dynamics and his inappropriate use of statistical techniques. We also emphasize the importance of distinguishing clearly between two quite different things: firstly, top-down and bottom-up regulation of populations and secondly, the much simpler task of categorizing factors affecting changes in population density as either top-down or bottom-up processes.

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No more published. Cf. Union list of serials.

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With the relentless quest for improved performance driving ever tighter tolerances for manufacturing, machine tools are sometimes unable to meet the desired requirements. One option to improve the tolerances of machine tools is to compensate for their errors. Among all possible sources of machine tool error, thermally induced errors are, in general for newer machines, the most important. The present work demonstrates the evaluation and modelling of the behaviour of the thermal errors of a CNC cylindrical grinding machine during its warm-up period.

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This paper addresses the minimization of the mean absolute deviation from a common due date in a two-machine flowshop scheduling problem. We present heuristics that use an algorithm, based on proposed properties, which obtains an optimal schedule fora given job sequence. A new set of benchmark problems is presented with the purpose of evaluating the heuristics. Computational experiments show that the developed heuristics outperform results found in the literature for problems up to 500 jobs. (C) 2007 Elsevier Ltd. All rights reserved.

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The influence of arbuscular mycorrhizal fungi (AMF) inoculation on Canavalia ensiformis growth. nutrient and Zn uptake, and on some physiological parameters in response to increasing soil Zn concentrations was studied. Treatments were applied in seven replicates in a 2 x 4 factorial design, consisting of the inoculation or not with the AMF Glomus etunicatum, and the addition of Zn to soil at the concentrations of 0, 100, 300 and 900 mg kg(-1). AMF inoculation enhanced the accumulation of Zn in tissues and promoted biomass yields and root nodulation. Mycorrhizal plants exhibited relative tolerance to Zn up to 300 mg kg(-1) without exhibiting visual symptoms of toxicity, in contrast to non-mycorrhizal plants which exhibited a significant growth reduction at the same soil Zn concentration. The highest concentration of Zn added to soil was highly toxic to the plants. Leaves of plants grown in high Zn concentration exhibited a Zn-induced proline accumulation and also an increase in soluble amino acid contents; however proline contents were lower in mycorrhizal jack beans. Plants in association or not with the AMF exhibited marked differences in the foliar soluble amino acid profile and composition in response to Zn addition to soil. In general, Zn induced oxidative stress which could be verified by increased lipid peroxidation rates and changes in catalase, ascorbate peroxidase, glutathione reductase and superoxide dismutase activities. In summary, G. etunicatum was able to maintain an efficient symbiosis with jack bean plants in moderately contaminated Zn-soils, improving plant performance under those conditions, which is likely to be due to a combination of physiological and nutritional changes caused by the intimate relation between fungus and plant. The enhanced Zn uptake by AMF inoculated jack bean plants might be of interest for phytoremediation purposes. (C) 2009 Elsevier Ltd. All rights reserved.