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Stiles, Kari A. "Light-stimulated leaf growth and the developmental environment : a physiological investigation /". Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5252.
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Barkoulas, Micvhalis. "A role for auxin in leaf development in crucifer plants". Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670145.
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Remmler, Lauren. "Growth and Morphogenesis: Quantifying 3D Surface Growth Patterns and Shape Changes in Developing Leaves". Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20669.
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ABSTRACT: Formation of organ shape is an intriguing yet largely unanswered question in developmental biology. Shapes arise as a result of tightly controlled spatial variation in the rates and directions of tissue expansion over the course of development; therefore, quantifying these growth patterns could provide information about the underlying mechanisms of morphogenesis. Here we present a novel technique and computational tools for quantifying growth and shape changes in developing leaves, with a few unique capabilities. This includes the ability to compute growth from three-dimensional (3D) coordinates, which makes this the first method suitable for studying leaf growth in species or mutants with non-flat leaves, as well as small leaves at early stages of development, and allows us to simultaneously capture 3D shape changes. In the following, we apply these methods to study growth and shape changes in the first rosette leaf of Arabidopsis thaliana. Results reveal clear spatiotemporal patterns in growth rates and directionality, and tissue deformation maps illustrate an intricate balance involved in maintaining a relatively flat leaf surface in wild type leaves. Semi-automated tools presented make a high throughput of data possible with this method, and algorithms for generating mean maps of growth will make it possible to perform standardized comparative analyses of growth patterns between wild type and mutants and/or between species. The methods presented in this thesis will therefore be useful for studying leaf growth and shape, to further investigate the mechanisms of morphogenesis.
RÉSUMÉ: Comment un organe acquiert sa forme particulière au cours du développement est une question intéressante mais largement non résolue. La forme d’un organe résulte de la façon dont les taux et directions de croissance de ses tissues varient dans l’espace et dans le temps. Quantifier les motifs de croissance est donc nécessaire pout élucider les mécanismes sous-jacents de la morphogenèse. Nous présentons ici une nouvelle méthodologie pour quantifier la croissance et les changements de forme dans les feuilles en développement. Cette méthodologie s’appuie sur le développement de nouvelles techniques expérimentales et de programmes informatiques, et présente des avantages uniques : la croissance de la surface des feuilles et le changement de forme peuvent être analysés en trois dimensions (3D), pour une longue période et de large déformations. De plus l’analyse de multiples échantillons permet de générer une cartographie moyenne des motifs de croissance à la surface des feuilles au cours de leur développement, ainsi qu’une description quantitative de la déformation des tissus sous l’effet de leur croissance. Dans cette thèse, nous présentons les résultats de croissance et de changements de forme de la première feuille de rosette d'Arabidopsis thaliana au cours de son développement. Les cartes moyennes de croissance révèlent des motifs spatio-temporels évidents tant pour les taux que pour les directions de croissance. De plus, la description de la déformation des tissus démontre l'équilibre complexe impliqué dans le maintien d'une surface relativement plane dans les feuilles. La méthode proposée et les logiciels associés permettra d’effectuer des analyses comparative de la croissance entre feuilles de type sauvage et feuilles de mutants aux formes altérées, afin d’élucider les mécanismes de la morphogenèse foliaire.
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Assaf, Rebecca. "Quantifying Vein Patterns in Growing Leaves". Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19980.
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How patterns arise from an apparently uniform group of cells is one of the classical problems in developmental biology. The mechanism is complicated by the fact that patterning occurs on a growing medium. Therefore, changes in an organism’s size and shape affect the patterning processes. In turn, patterning itself may affect growth. This interaction between growth and patterning leads to the generation of complex shapes and structures from simpler ones. Studying such interactions requires the possibility to monitor both processes in vivo. To this end, we developed a new technique to monitor and quantify vein patterning in a growing leaf over time using the leaves of Arabidopsis thaliana as a model system. We used a transgenic line with fluorescent markers associated with the venation. Individual leaves are followed in many samples in vivo through time-lapse imaging. Custom-made software allowed us to extract the leaf surface and vein pattern from images of each leaf at each time point. Then average spatial maps from multiple samples that were generated revealed spatio-temporal gradients. Our quantitative description of wild type vein patterns during leaf development revealed that there is no constant size at which a part of tissue enclosed by vasculature will become irrigated by a new vein. Instead, it seemed that vein formation depends on the growth rate of the tissue. This is the first time that vein patterning in growing leaves was quantified. The techniques developed will later be used to explore the interaction between growth and patterning through a variety of approaches, including mutant analysis, pharmacological treatments and variation of environmental conditions.
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Pace, Micah D. "Effect of Stand Density on Behavior of Leaf Area Prediction Models for Eastern White Pine (Pinus strobus L.) in Maine". Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/PaceMD2003.pdf.
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Cooney-Sovetts, Claire. "Phylloclade development in the Asparagaceae". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65988.
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Neumann, John A. P. "Variability in the relationship between leaf area and selected stem measures in Douglas fir". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28819.
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Variability in the relationship between tree leaf area (TLA) and selected stem measurements was examined in three Douglas-fir stands (Pseudotsuga menziesii (Mirb.) Franco, var. menziesii) that were less than 50 years-old, spaced to approximately 550 to 650 stems/ha, and differed in soil moisture and nutrients. Attention was given to the effect of mean annual ring width (MARW), cross-sectional area of the live bark (ALB - a surrogate measure of relative nutrient storage in the stem), and cross-sectional area of the most recent annual rings equal in number to the number of whorls in the live crown (ALC), on variability in the relationship between TLA and cross-sectional area of sapwood (ASW).
At breast height, basal area, ASW, and cross-sectional area of sapwood plus live bark (ASWLB) were not linearly related to TLA, and linear regression equations using log transformed variables varied significantly between sites. Nonlinear regression equation for ASW at breast height was: TLA = 0.064ASẆ¹•³³ (I² = 0.856). Including D (the distance between breast height and the center of the live crown) in the nonlinear equation, did not significantly improve the regression.
Tree leaf area prediction models using stem measures from the base of live crown (blc) had higher adjusted R² values than models using stem measures from breast height.
At the blc, basal area, ASW, and ASWLB were linearly related to TLA (adjusted R² = 0.926, 0.908, and 0.934, respectively).
Multiplying ASW by MARW did not improve the fit of the regression models. Multiplying ASW by ALB improved the linearity of the relationship of ASW at breast height to TLA. The best fitting TLA model overall used the product of ASW at blc and ALB at blc as the independent variable (adjusted R² = 0.967).
The results indicate that research into the allometric relationship of TLA to stem measures should give consideration to more than hydraulic measures and include measures of bark function. At breast height and the blc, the independent variable ALC was linearly related to tree leaf area and had higher adjusted R² values than did ASW. In most trees the ALC stem measure was found to include a portion of heartwood area. The strong relationship between TLA and ALC suggests that a given transpiring leaf mass or area is related to a proportional amount of conducting stemwood and physical support stemwood.
A quick alternative approach for estimating individual tree leaf area using photographs taken at fixed distance and angle from the target tree did not result in a reliable tree leaf area prediction technique. The difficulty of obtaining views of the tree crown which were not obstructed by adjacent tree crowns was the major obstacle. Using a fixed distance and camera angle was a problem because of variable
tree heights. However, altering these fixed positions introduced additional variation into the tree leaf area estimation.
Mean specific leaf area (SLA) varied significantly by site, needle age class, and crown position. Mean SLA per needle age class per branch can be predicted with 95% confidence and a 10% allowable error using six 10-needle samples.Forestry, Faculty of
Graduate
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MU'ALLEM, ABUBAKER SALEM. "PHYSIOLOGICAL CHARACTERISTICS IN COTTON GENOTYPES AS AFFECTED BY PLANT AGE AND PLANTING DENSITIES". Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184031.
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Physiological characteristics of three cotton genotypes were evaluated for their responses to plant aging under high and low planting density (HPD and LPD) treatments. In addition, the relationship of these physiological characteristics to fruit production were determined. Two genotypes are sympodia producing, "Pima S-6" (Gossypium barbadense L.) and "Deltapine 90" (DPL-90) (G. hirustum L.). The third, a "Cluster Selection" (G. barbadense L.) does not produce sympodia. These genotypes were grown on a Gila sandy loam soil at Tucson, Arizona in 1984 and 1985. Plant physiological characteristics were measured under field conditions at 5 intervals. Leaf physiological characteristics were determined at 7 different leaf ages. LPD treatment significantly reduced total dry weight (TDW), fruit dry weight (FDW), and leaf area index (LAI) in each genotype, but reductions were more pronounced in Pima S-6 and Cluster Selection in both seasons. However, LPD treatment significantly increased plant leaf area, but had no effect on specific leaf weight (SLW), petiole nitrate-nitrogen (Petiole NO₃-N) concentration, leaf area ratio (LAR), and fruiting index (FI), for all genotypes in both seasons. The aging patterns of all physiological characteristics were similar in both planting density treatments, regardless of genotype or season. Regression analyses showed that photosynthetic rate was curvilinearly correlated with leaf age (r² = 0.65 to 0.77, P < 0.01). However, petiole NO₃-N concentration decreased linearly with increasing leaf age (r² = 0.90 to 0.91, P < 0.01). Photosynthetic rate increased curvilinearly with increasing petiole NO₃-N concentration (r² = 0.61 to 0.79, P < 0.01). SLW was not correlated with leaf age, or other leaf physiological characteristics regardless of planting density treatment in 1985. TDW, FI, and LAI were directly related, while petiole NO₃-N concentration and LAR were inversely related to fruit production for all genotypes in both seasons. Multiple regression analyses showed that excluding planting density treatment effect, TDW, FI, and LAI were the most important variables incorporated for fruit prediction in both seasons.
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Saropulos, Athanassios S. "Chilling-induced physiological dysfunction in leaves of Zea mays L. and Capsicum annuum L. seedlings". Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283693.
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Amin, Mira. "Mechanism of Vein Pattern Formation in Arabidopsis Thaliana Leaves: testing the Canalization Hypothesis". Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20169.
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Several mechanisms have been proposed to explain the process of vein pattern formation in plant tissues. The most widely accepted amongst biologists is the canalization hypothesis, derived from pea root and stem experiments. According to this hypothesis, a signal, thought to be the phytohormone auxin, is transported polarly from cell to cell from the shoot to the root and is canalized progressively into narrow channels of high auxin fluxes that later differentiate to become vascular tissue.
In this project, we set out to test whether auxin canalization drives vein pattern formation, using Arabidopsis thaliana mutants with increased auxin transport (max4-1, max3-9, max2-1 and max1-1). We predicted that the mutants would have distinct vein patterns and especially different angles between the primary and secondary veins, compared to the wild type. First rosette leaves of 15 plants per genotype were harvested for analysis each day from 7 to 17 days after sowing, giving a total of eight hundred twenty-five leaf samples to analyze. Venation patterns were extracted and analyzed using custom-made software written with Matlab.
Overall, compared with the wild type, mutants with the highest auxin transport (max4-1 and max3-9) had different vein patterns at early developmental stages, confirming a role for auxin transport in vein patterning. However, veins of mutants and wild type connected at similar angles, which is not consistent with the auxin canalization hypothesis, as originally formulated.
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Sanders, Heather Louise. "Developmental Changes in the Evolution of Fundamental Plant Organography". Ohio : Ohio University, 2007. http://www.ohiolink.edu/etd/view.cgi?ohiou1188579264.
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Shahzad, Muhammad [Verfasser]. "Growth-related changes in subcellular ion and protein patterns in maize and field bean leaves under salt stress / Muhammad Shahzad". Kiel : Universitätsbibliothek Kiel, 2012. http://d-nb.info/102114018X/34.
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Mohamed, Fatheya. "Mineral analysis and proximate composition of leaves of (Brassica oleracea var. acephala) in response to boron application in pot experiments". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2793.
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Thesis (MTech (Agriculture)--Cape Peninsula University of Technology, 2018.Choumollier (narrow-stem kale) (Brassica oleracea, L.) has been progressively used in recent years as a supplementary forage harvest in many countries with a temperate climate. Boron (B) and calcium (Ca) are the two most important elements for supporting plant structure and function of plasma membranes. Boron nutrition is vital for obtaining high quality yields in vegetables. The main objective of this study was to evaluate the extent to which boric acid concentration can affect growth parameters (plant height, leaf numbers, chlorophyll levels, and leaf size) of Brassica olereacea var. acephala at different stages of growth and development. Treatment comprised of four concentrations of boron (0.3 mg/kg, 0.4 mg/kg, 0.5 mg/kg and 0.6 mg/kg). Yield and physiological growth responses were measured during the course of the study to ascertain effectiveness and influence of boron treatments on the test crops. Leaves of B. oleracea were harvested at weekly intervals (W1, W2, W3, W4 and W5) after each treatment regimen for approximate basic mineral analysis and composition. Soil pH did not vary much among the various orchard blocks tested, regardless of soil depth. Exchangeable cations Na+ and K+ levels did not vary significantly, but Ca2+ and Mg2+ levels fluctuated considerably among orchards analyzed. The Control Orchard exhibited a higher P content than the other orchards. Ca, Mg, Cu and B levels did not vary significantly among the orchards, but Na, Fe and Zn levels were markedly raised in the Orchard treated with 0.3 mg/kg boron) relative to the Control Orchard. Chlorophyll fluorescence was significantly dependent on the treatment dose of boron as compared to control. Chlorophyll fluorescence also increased significantly with the growth period, i.e., the duration following the initial treatment at all doses of boron. Boron at all did not significantly affect leaf count, leaf length and plant height. The work may add to the body of knowledge on the influence of boron on the physiological performance, mineral contents and proximate composition of leaves of the species. Furthermore, the findings may have important applications in achieving high quality yields in vegetable crops.
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Lewis, D. James. "Foliar-applied phosphate on potatoes (Solanum tuberosum L.) : factors affecting uptake by the leaves and the effects on growth and yield". Thesis, Open University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320528.
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Weisner, Angelica. "Does Asellus aquaticus change its pigmentation when given different types of food?" Thesis, Linköpings universitet, Biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-159762.
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When an animal’s pigmentation matches the background across various types of environments, it is potentially an example of cryptic pigmentation, most likely as a response to natural selection by visually oriented predators. One example of cryptic pigmentation is phenotypic plasticity, meaning that an organism can exhibit different phenotypes in different environments. The freshwater isopod Asellus aquaticusliving in stands of reeds tends to have darker pigmentation than individuals living amongst lighter-coloured stoneworts, which has been suggested to result from visual predation. A recent study showed, however, that pigmentation in A. aquaticus is partly plastic, influenced by the nutritional composition in their diet. Here, I performed a laboratory experiment on A. aquaticusto see if the nutritional composition in stoneworts decreases pigmentation. Isopods were provided with a diet of either decaying leaves or stoneworts. The experiment took place over four weeks and pigmentation and growth were analysed at 0, 15 and 31 days. I found that pigmentation in A. aquaticusincreased significantly on both diets. And, there was no difference between both diets in amount of change in pigmentation. The fact that isopods that were feeding on stoneworts did not become lighter to match their background colour preferably depend on a high nutritional composition in the provided food, considering they also more than doubled their weight. In other words, phenotypic plasticity due to different diets between habitats is not the explanation to lighter coloured isopods living amongst stoneworts. However, these results do not exclude that differences can arise over a longer time or differs between different species of stoneworts.
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Strever, Albert (Albert Erasmus). "Non-destructive assessment of leaf composition as related to growth of the grapevine (Vitis vinifera L. cv. Shiraz)". Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/19963.
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Thesis (PhD(Agric))--Stellenbosch University, 2012ENGLISH ABSTRACT: Field spectroscopy was used to study leaf composition and selected factors (including canopy growth manipulation and water status changes) that may impact on it in a Vitis vinifera cv. Shiraz vineyard, showing considerable variability in vigour. Temporal and spatial variability in leaf composition were incorporated into measurements by analysing leaves in different shoot positions and at different developmental stages during three different growing seasons. Irrigation and canopy manipulation treatments were also imposed in order to provide new insights into assessing the grapevine leaf and possibly also the canopy growth and ageing dynamics as well as pigment content, as a basis of executing a generally non-destructive measurement approach. Despite large climatic differences between the seasons, canopy size seemed of crucial importance in determining grapevine water relations in the grapevines from the different canopy manipulation treatments. Drastic compensation effects in terms of secondary shoot growth also followed the canopy reduction treatment. Despite this, canopy microclimate was apparently improved, considering the results from light measurements as well as the ripening dynamics in the reduced canopies. Reduced canopies also seemed to display a different canopy composition, in favour of secondary growth. This could have impacted positively on water use efficiency as well as ripening, due to higher photosynthetic efficiency of these leaves during the ripening stages. The reduced canopy treatments offered the possibility of attaining technological ripeness at an earlier stage and at comparatively lower potential alcohol levels. This study illustrated the relevance of considering the vegetative development of the grapevine, along with leaf ageing in the canopy, when conducting calibrated non-destructive measurements of leaf pigments, structure and water content. The relevance of using multivariate techniques in leaf spectroscopy was shown. This can be applied and simplified to aid in non-destructive leaf pigment, structure and water content estimation in future studies. Even with the general variation encountered in this vineyard, predictions of the major pigments in grapevine leaves were within acceptable error margins. Further work is required to improve the modelling of xanthophylls, which may require non-linear multivariate techniques. Logistical shoot growth modelling was used in leaf age estimation and classification, which made it possible to simplify statistical analysis of the leaf parameters mentioned. Practical application of the modelled and predicted parameters was shown for a specific period in season two by comparing the reaction of different treatments to developing water deficits. The results indicated that several parameters, with special mention of the carotenoid:chlorophyll ratio and chlorophyll a:b ratio, can be monitored on young and old leaves in the canopy in order to monitor developing water deficit stress. The modelled parameters, however, did not seem to be sensitive enough to allow specific prediction of predawn leaf water potential values. Specific leaf mass, equivalent water thickness, total specific leaf mass as well as leaf chronological age were successfully predicted from leaf spectral absorbance data, and this may be useful in future work on quantifying leaf adaptation to the micro-environment within the canopy.
AFRIKAANSE OPSOMMING: Veldspektroskopie is gebruik om blaarsamestelling en spesifieke faktore (insluitend lowergroei manipulasie en waterstatus veranderinge) wat ‘n impak kan hê in ‘n Vitis vinifera cv. Shiraz wingerd, met beduidende variasie in groeikrag, te ondersoek. Ruimtelike, asook tydsgebonde, variasie in blaarsamestelling is geïnkorporeer in die metings deur blare van verskillende lootposisies en vir verskillende ontwikkelingstadia gedurende drie verskillende groeiseisoene te meet. Besproeiings- en lowermanipulasie behandelings is ook uitgevoer om die dinamiek van blaar- en lowergroei, veroudering, asook pigmentinhoud te bestudeer binne die konteks van die uitvoering van ‘n nie-destruktiewe meetstrategie. Ondanks groot klimaatsverskille tussen die seisoene, blyk lowergrootteverskille belangrik te wees in die bepaling van wingerdstok-waterverhoudings in die verskillende lowermanipulasie behandelings. Drastiese kompensasiereaksies ten opsigte van sylootgroei is waargeneem in reaksie op die gereduseerde lowerbehandeling. Indien die resultate van ligmetings en druifrypwording in die gereduseerde lowerbehandeling in ag geneem word, is lowermikroklimaat egter steeds verbeter. Hierdie behandeling het oënskynlik ook veranderde lowersamestelling gehad, tot voordeel van sylootgroei. Dit kon moontlik ‘n positiewe invloed gehad het op waterverbruikseffektiwiteit asook druifrypwording, as gevolg van moontlike hoër fotosintetiese effektiwiteit van die blare gedurende die rypwordingstadia. Die gereduseerde lowerbehandeling het die moontlikheid gebied om tegnologiese rypheid by ‘n vroeër datum te bereik, met moontlike laer alkoholvlakke in die wyn. Hierdie studie het die belangrikheid beklemtoon om die vegetatiewe ontwikkeling van die wingerdstok in ag te neem wanneer gekalibreerde nie-destruktiewe metings van blaarpigmente, blaarstruktuur asook waterinhoud onderneem word. Die belang van multi-variant meettegnieke in blaarspektroskopie is aangetoon. Dit kan verder vereenvoudig word ter ondersteuning van niedestruktiewe meting van blaarpigment, -struktuur en -waterinhoudsbepaling in toekomstige studies. Selfs met die variasie wat in die wingerd voorgekom het, was die voorspellings van die vlakke van die belangrikste pigmente wat in wingerdblare aangetref word binne aanvaanbare foutgrense. Opvolgwerk is nodig om die modellering van xanthofil te verbeter, aangesien dit moontlik nielineêre multi-variant analise mag benodig. Logistiese groeimodellering is gebruik om blaarouderdom te bepaal en te klassifiseer, wat dit moontlik gemaak het om statistiese analise te vereenvoudig vir die genoemde blaarparameters. Die praktiese toepassing van die gemodelleerde en voorspelde parameters is aangetoon vir ‘n spesifieke gedeelte in seisoen twee, deur die reaksie van verskillende behandelings op toenemende watertekorte te bestudeer. Resultate het aangetoon dat verskeie parameters, met spesifieke klem op die karotenoïed:chlorofil verhouding, asook die chlorofil a:b verhouding, gemoniteer kan word op jong en ouer blare in die lower ten einde ontwikkelende waterstrestoestande te identifiseer. Die gemodelleerde parameters was egter klaarblyklik nie sensitief genoeg vir akkurate voorspelling van voorsonsopkoms-waterpotensiaalvlakke nie. Spesifieke blaarmassa, ekwivalente waterdikte, totale spesifieke blaarmassa, sowel as blaarouderdom kon suksesvol voorspel word deur gebruik te maak van absorpsieblaarspektroskopie, wat nuttig kan wees in toekomstige studies wat handel oor die kwantifisering van blaaraanpassing by die mikro-omgewing binne ‘n wingerdlower.
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Moon, J. W. Jr, E. Fallahi y K. Jordan. "Photosynthetic Acclimation of Leaves of Three Apple Cultivars as Affected by Growth Under Full Sun or 85 Percent Shade and Subsequent Transfer to the Contrasting Light Regime". College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215715.
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Joesting, Heather M. "Physiology and Leaf Characteristics of American Chestnut ( Castanea Dentata (Marsh.)Borkh.) Seedlings, Saplings, and Mature Trees in Ohio and Wisconsin". Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125441507.
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Hu, Yuncai. "Growth response of wheat plant to salinity in hydroponics and soil : I Interactive effects of salinity and macronutrients on the growth, yield, and mineral element contents under hydroponic conditions : II Spatial and temporal distribution of growth and the mineral element and carbohydrate contents in the leaves under saline soil conditions /". Zürich, 1996. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11619.
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Scarpa, Fabiano Micheletto. "Estudo comparativo do crescimento de plantulas e de atributos foliares em especies do cerrado e da mata atlantica". [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315139.
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Orientadores: Ivany Ferraz Marques Valio, Sandra Maria Carmello-GuerreiroTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: O Cerrado e a Mata Atlântica são ambientes contrastantes em relação aos fatores hídrico, nutricional e luminoso. Portanto, algumas características adaptativas são esperadas em termos do crescimento das plântulas e da morfologia e anatomia das folhas para cada ambiente. Neste trabalho, foi feito um estudo comparativo entre espécies do cerrado e da Mata Atlântica utilizando-se pares congenéricos, sendo cada par formado por uma espécie da Mata Atlântica e uma espécie do Cerrado. Estudou-se o crescimento de plântulas em 10 pares congenéricos pertencentes a 8 famílias, a morfologia funcional de folhas de indivíduos adultos em 14 pares pertencentes a 11 famílias e a anatomia foliar em 8 pares pertencentes a 7 famílias. Para os estudos de crescimento, foram avaliados os atributos: área foliar específica (AFE), razão de área foliar (RAF), razão de massa da raiz (RMR), razão de massa do caule (RMC), razão de massa das folhas (RMF), razão raiz/parte aérea (R/PA), taxa de crescimento relativo (TCR) e taxa de assimilação líquida (TAL). Para o estudo do efeito do estresse de luz no crescimento das plântulas, foi utilizado um par congenérico de espécies: Eriotheca candolleana (da mata atlântica) e Eriotheca gracilipes (do Cerrado). Foram utilizados dois níveis de irradiância: 50% e 2%. Para avaliação da morfologia funcional das folhas, folhas de indivíduos adultos das diferentes espécies estudadas os atributos suculência, AFE, espessura e largura foram avaliados. Nos estudos anatômicos, as imagens dos cortes transversais da lâmina foliar foram digitalizadas e analisadas através do programa ¿image pro-plus¿. Houve convergências de adaptações aos ambientes estudados para algumas características. Maiores valores de TCR foram em geral encontrados para espécies da Mata Atlântica, assim como maiores valores de AFE e RAF, que estão intimamente associados à interceptação de luz para o crescimento. Não houve relação entre investimento radicular e o ambiente de ocorrência das espécies. Verificou-se que as espécies do Cerrado apresentaram maior suculência e menor AFE. Os dados de AFE encontrados nas folhas adultas revelaram o mesmo padrão obtido para plântulas. Os cortes anatômicos evidenciaram uma espessura maior da lâmina foliar e do mesofilo e um parênquima mais compactado, de maneira geral, para as espécies do Cerrado. A porção laminar lignificada também apresenta uma área significativamente maior em folhas de plantas do Cerrado. Folhas mais espessas e lignificadas diminuem a interceptação de luz e reduzem assim as taxas de crescimento, o que é muito vantajoso em ambientes onde os recursos hídricos e os nutrientes são limitantes
Abstract: The Cerrado and the Atlantic Rainforest are contrasting environments in terms of water, light and nutrient availability. Thus some adaptive traits for seedling growth and leaf morphology and anatomy are expected for each habitat. In this work a comparative study was performed between the Cerrado and the Atlantic rainforest species using congeneric pairs .Each pair was composed by a species from the Cerrado and a species from the Atlantic Rainforest. Seedling growth was studied in 10 pairs from 8 families, mature leaf functional morphology was studied in 14 pairs from 11 families and leaf anatomy was studied in 8 pairs from 7 families. For seedling growth studies, specific leaf area (SLA), leaf area ratio (LAR), root mass ratio (RMR), stem mass ratio (SMR), leaf mass ratio (LMR), root/shoot ratio (R/S), relative growth rate (RGR) and net assimilation rate (NAR) were calculated. For the study of light stress effect on seedling growth it was used a congeneric pair of species: Eriotheca candolleana (from the Atlantic Rainforest) and Eriotheca gracilipes (from Cerrado). Two irradiance levels were performed (50% and 2%) For the evaluation of mature leaf functional morphology, succulence, SLA, leaf thickness and leaf width were measured. For the anatomy studies, images from leaf transversal cross section were digitalized and analised using the software image pro plus. There were adaptive convergences for some traits relative to the habitat. Higher RGR, SLA and LAR values were generally achieved for species from the Atlantic Rainforest. SLA and LAR are closely related to light interceptance for plant growth. It was not found an association between root investiment and species environment. It was observed that leaves of Cerrado species were more succulent and presented lower values of SLA. SLA data found in mature leaves showed the same pattern obtained for the seedlings. Cross sections of the leaves revealed higher lamina thickness and higher mesophyll thickness. A more condensed parenchyma was generally found for the Cerrado species. The lignified proportion of leaves was also higher in plants from the Cerrado. Thick and more lignified leaves decrease light interception and reduce growth rates. Such traits are of important adaptive value in environments where water and nutrients are limiting resources
Doutorado
Doutor em Biologia Vegetal
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Soares, Leonardo Cirilo da Silva. "Efeito de reguladores de crescimento (via tratamento de sementes e foliar) no desenvolvimento e na produtividade da cultura de algodão". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-10022011-164159/.
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Com o objetivo geral de verificar o efeito do uso de reguladores de crescimento, via tratamento de sementes e foliar, sobre o desenvolvimento e a produtividade da cultura de algodão foram desenvolvidos cinco experimentos durante os anos de 2009 e 2010 (quatro desenvolvidos em Piracicaba, SP e o quinto em Pedra Preta, MT) com os seguintes objetivos específicos: (Experimento 1): verificar o efeito de dois reguladores de crescimento (cloreto de mepiquat associado ou não a ciclanilida) e doses (0,00+0,00; 1,60+0,40; 4,50+0,00 e 4,50+1,13 g de cloreto de mepiquat + ciclanilida por kg de sementes) sobre o desenvolvimento de diferentes cultivares de algodão (FMT-523, FMT-701, NuOpal, FM-993 e FM-910); (Experimento 2): verificar o efeito de diferentes reguladores de crescimento (cloreto de mepiquat associado ou não a ciclanilida) e doses (0,00+0,00; 0,75+0,19; 1,50+0,00; 1,50+0,38; 2,25+0,56; 3,00+0,00; 3,00+0,75; 3,75+0,94; 4,50+0,00 e 4,50+1,13 g de cloreto de mepiquat + ciclanilida por kg de sementes), aplicado via tratamento de sementes, sobre o desenvolvimento da cultura de algodão; (Experimento 3): verificar o efeito do uso do regulador de crescimento cloreto de mepiquat via tratamento de sementes (doses de 0,0 e 4,5 g de cloreto de mepiquat por kg de sementes), combinado com diferentes doses foliares (doses de 0, 63, 126 e 189 g.ha-1 de cloreto de mepiquat aplicadas em duas épocas, sendo a primeira aplicação: [1] em V4 - aplicação precoce - e [2] em B1 - aplicação padrão), no desenvolvimento e na produtividade da cultura de algodão; (Experimento 4): verificar o efeito do uso do regulador de crescimento cloreto de mepiquat via tratamento de sementes (doses de 0,0 e 4,5 g de cloreto de mepiquat por kg de sementes), combinado com diferentes doses foliares (0, 125, 250, 375 e 500 g.ha-1 de cloreto de mepiquat), na produtividade da cultura de algodão; e (Experimento 5): verificar o efeito de diferentes reguladores de crescimento (cloreto de mepiquat associado ou não a ciclanilida) e doses (0,00+0,00; 0,75+0,19; 1,13+0,00; 1,50+0,38; 2,25+0,00; 2,25+0,56; 3,00+0,75; 3,38+0,00; 3,75+0,94; 4,50+0,00 e 4,50+1,13 g de cloreto de mepiquat + ciclanilida por kg de sementes), aplicados via tratamento de sementes, no desenvolvimento da cultura de algodão. De acordo com os resultados obtidos, conclui-se que o uso do cloreto de mepiquat, via tratamento de sementes e foliar, interfere retardando o desenvolvimento e reduzindo o crescimento e a produtividade da cultura de algodão, e que a ciclanilida, via tratamento de sementes, potencializa o efeito do cloreto de mepiquat.With the general purpose of verifying the growth regulators (applied by seed treatment and foliar) effect on cotton crop development and productivity five experiments were carried out during 2009 and 2010 (four in Piracicaba, State of São Paulo, and one in Pedra Preta, State of Mato Grosso) with the following specific objectives: (Experiment 1): verify the effect of two growth regulators (mepiquat chloride in association with cyclanilide) and doses (0.00+0.00, 1.60+0.40, 4.50+0.00 and 4.50+1.13 g of mepiquat chloride + cyclanilide per kg of seeds) on the development of different cultivars of cotton (FMT-523, FMT-701, NuOpal, FM-993 e FM-910); (Experiment 2): verify the effect of different growth regulators (mepiquat chloride in association with cyclanilide) and doses (0.00+0.00, 0.75+0.19, 1.50+0.00, 1.50+0.38, 2.25+0.56, 3.00+0.00, 3.00+0.75, 3.75+0.94, 4.50+0.00 and 4.50+1.13 g of mepiquat chloride + cyclanilide per kg of seeds), applied by seed treatment, on the crop cotton development; (Experiment 3): verify the effect of mepiquat chloride (growth regulator) by seed treatment (doses of 0.0 and 4.5 g of mepiquat chloride per kg of seeds), associated to different foliar doses (0, 63, 126 and 189 g.ha-1 of mepiquat chloride applied in two periods, being the first application: [1] in V4 - precocious application - and [2] in B1 - standard application), on the development and productivity of cotton crop; (Experiment 4): verify the effect of mepiquat chloride (growth regulator) by seed treatment (doses of 0.0 and 4.5 g of mepiquat chloride per kg of seeds), associated to different foliar doses (0, 125, 250, 375 and 500 g.ha-1 of mepiquat chloride), on the cotton crop productivity; and (Experiment 5): verify the effect of different growth regulators (mepiquat chloride in association with cyclanilide) and doses (0.00+0.00, 0.75+0.19, 1.13+0.00; 1.50+0.38, 2.25+0.00, 2.25+0.56, 3.00+0.75, 3.38+0.00, 3.75+0.94, 4.50+0.00 and 4.50+1.13 g of mepiquat chloride + cyclanilide per kg of seeds), applied by seed treatment, on the cotton crop development. According to the results, we conclude that the use of mepiquat chloride, by seed treatment and foliar, slows the development and reduces the growth and yield of cotton crop, and the cyclanilide, applied by seed treatment, enhances the negative effect of chloride mepiquat.
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Lieurance, Deah M. "Leaf Phenology, Fecundity, and Biomass Allocation of the Invasive Shrub Lonicera maackii (Rupr.) Maxim in Contrasting Light Environments". Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1108143238.
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Zhang, Howard. "National Leaders and Economic Growth: What Characteristics Matter?" Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:14398543.
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This paper uses data on more than 1000 national leaders between 1875 and 2005 to examine how four key individual characteristics – military experience, being a member of a political dynasty, belonging to the ethnic majority, and the number of daughters – influence the rate of economic growth. Following Jones and Olken (2005), I identify leadership transitions caused by natural deaths and illnesses to isolate the effect of leaders on economic growth, sidestepping the causality that runs between economic growth and the timing of leadership transitions. I find that even though leaders do seem to matter for economic growth, there does not seem to be substantial evidence that the identified characteristics systematically influence national growth. I then examine if these characteristics affect relevant policy outcomes. Although I do not find substantial evidence that the identified characteristics systematically influence the policy outcomes, I do find some evidence of a relationship between a leader’s ethnicity and the infant mortality rate, as well as between the number of daughters a leader has and the female and male adult mortality rates.
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Hayes, Susan M. "A Mixed Methods Perspective: How Integral Leaders Can Contribute to the Growth of Emerging Leaders". Antioch University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1444736633.
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Biehn, Russell V. "Development handbook for potential ministry leaders in small churches". Theological Research Exchange Network (TREN), 1997. http://www.tren.com.
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Kao, John Yun-Han. "A manual for growth group leaders of Toronto Chinese Community Church". Theological Research Exchange Network (TREN), 1988. http://www.tren.com.
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McCaffree, Alison Dale 1970. "Matching company growth to skill adaptation levels". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80372.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 1999.Includes bibliographical references (p. 65-66).
by Alison Dale McCaffree.
S.M.
M.B.A.
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Jaggi, Anju 1975. "Implications of rapid growth on organizational effectiveness". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/84341.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2003.Includes bibliographical references (p. 69-70).
by Anju Jaggi.
S.M.
M.B.A.
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Wyche, Katrina Jean. "Factors Contributing to Leaders Leveraging Traumatic Experiences for Post-traumatic Growth in Their Leadership Capacity". Xavier University Leadership Studies & Human Resource Development / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=xulead1610051221058488.
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Raquel, Ruben R. "Developing a healthy church growth strategy with selected leaders for Springdale Baptist Church of Ripley, Mississippi". Online full text .pdf document, available to Fuller patrons only, 2004. http://www.tren.com.
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O'Sullivan, Don Christopher. "Investigation of the role of insulin-like growth factor-I leader exons". Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621946.
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Abel, Guy, Bilal Barakat, Samir KC y Wolfgang Lutz. "Meeting the sustainable development goals leads to lower world population growth". The National Academies of Sciences, Engineering, and Medicine, 2016. http://dx.doi.org/10.1073/pnas.1611386113.
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Here we show the extent to which the expected world population growth could be lowered by successfully implementing the recently agreed-upon Sustainable Development Goals (SDGs). The SDGs include specific quantitative targets on mortality, reproductive health, and education for all girls by 2030, measures that will directly and indirectly affect future demographic trends. Based on a multidimensional model of population dynamics that stratifies national populations by age, sex, and level of education with educational fertility and mortality differentials, we translate these goals into SDG population scenarios, resulting in population sizes between 8.2 and 8.7 billion in 2100. Because these results lie outside the 95% prediction range given by the 2015 United Nations probabilistic population projections, we complement the study with sensitivity analyses of these projections that suggest that those prediction intervals are too narrow because of uncertainty in baseline data, conservative assumptions on correlations, and the possibility of new policies influencing these trends. Although the analysis presented here rests on several assumptions about the implementation of the SDGs and the persistence of educational, fertility, and mortality differentials, it quantitatively illustrates the view that demography is not destiny and that policies can make a decisive difference. In particular, advances in female education and reproductive health can contribute greatly to reducing world population growth.
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Gifford, Roy. "Factors Contributing to Sustainable Brand Growth". Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1488372404181176.
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Mullen, Torrey Rieser. "How long should we follow the leader? Using latent growth models of longitudinal leadership performance change to predict leader outcomes". NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-03152007-090353/.
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A paucity of research has examined longitudinal performance and the predictive ability of performance change on important outcomes. In addition, few studies have investigated the effects of rater variables on performance over time and the effect of rater group composition or rater perspective on longitudinal performance ratings. The purpose of this research was to investigate consequences related to rater characteristics including rater context, perspective and composition in the measurement and prediction of longitudinal performance. Results suggested that longitudinal self-ratings, boss ratings, and direct report ratings were equivalent. The results of this study also concur with earlier findings about the dynamic nature of performance (Thoreson, et al., 2004). Longitudinal change in performance was found for every leadership performance factor in ratings from every rater group. Latent growth curves for all rater groups were remarkably similar although boss ratings showed the most consistent longitudinal change. Adding sector and/or subdivision covariates to the models improved model fit for each rating source group. Using growth mixture modeling with the rater context covariates allowed the estimation of latent classes that clarified the direction of leadership performance growth. Results also indicated the importance of rater composition. Direct reports who consistently rated the same leader tended to rate those leaders more highly than the direct reports who rated different leaders. Adding the composition moderator variable to the boss rating models improved model fit for four of the five leadership performance models. The composition covariate also significantly predicted the intercept and slope for boss ratings of Ethics and Character, suggesting that obtaining leadership performance ratings from consistent bosses plays an important role in detecting linear change in leader performance, especially for ratings of Ethics and Character. Leaders with positive development on Ethics and Character had higher consensus performance scores, confirming past research showing that integrity and ethical behavior are important characteristics in successful managers (Posner & Schmidt, 1984; Mortensen, Smith, & Cavanagh, 1989).
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Albers, Toni Lynn 1970. "Avoiding the perils of cyclic growth on Dell's direct environment". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/77769.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program, Massachusetts Institute of Technology, 2000.Includes bibliographical references (leaves 85-86).
The high technology industry suffers from a phenomenon that is common to many businesses and industries throughout the world - a "hockey-stick" demand skew. Such a skew derives its name from the shape of the quarterly demand curve as it is viewed across time. The demand curve is characterized by sales rates that are sluggish at the start of a quarter, before increasing dramatically by quarter-end, and then dropping off again after the close of the quarter. Despite its lauded Direct Model, Dell Computer Corporation is not exempt from issues concerning the hockey stick demand skew. A very definite quarterly skew exists for most of Dell's customer segments, particularly those in which a direct sales team is active. The author had the opportunity to spend seven months at Dell's facilities investigating this demand phenomenon. As an industry leader with their Direct Model, Dell's build-to-order strategy necessitates that systems are produced and shipped at a rate that closely mirrors the sales rate. The variability of a hockey-stick demand skew requires that the entire organization have the flexibility to adapt quickly to changes throughout the quarter. However, such flexibility does not come without a price. The end of quarter rush requires that manufacturing plan for excess capacity and work overtime to meet peak demand periods. Logistical costs rise due to the various expediting activities that must be undertaken. Accompanying these cost increases is a drop in gross margin at the end of the quarter as a result of changes and variability in procurement costs over the quarter. These factors effectively raise the marginal cost of systems built at the end of the quarter as compared to the beginning. In addition, an end-loaded sales demand places a large operational burden upon several pieces of the Dell organization. Manufacturing must not only be prepared with excess physical capacity at the end of a quarter, but must also have the necessary human resource capacity to accommodate these large swings in demand. These operational constraints provide a second impetus for a close examination of this issue at Dell. Finally, the greater the demand skew at Dell, the greater the financial risk for the company. The late demand swing is, in effect, a double-edged sword of risk for the organization. Not only does a large percentage of their demand for the quarter hit at once, but it hits at a time late in the quarter when there is little or no time to make up the difference if something were to happen. Any major disturbance within Dell's manufacturing structure, or that of their supply base, within the last two weeks of the quarter could have a unconstructive impact on unit volumes and total revenue for the quarter. For a company that is so intensely market driven, this is quite an unfavorable scenario. This triple nemesis of sub-optimal profitability, operational difficulties, and financial risk provided the impetus for this thesis work and project. Within Dell, the first order of business was to determine whether the hockey stick was internally or externally driven. After that determination was made, the author utilized non-linear programming tools to determine the optimal quarterly sales skew, based upon profitability measures. The final step was then to identify the drivers of the demand skew and to determine how they could best be manipulated to achieve the optimal skew. In this regard, Dell's Direct Model is notably well suited to the task. Without an intricate, multi-layered sales channel, alterations can easily be made within the sales and marketing arena that can immediately and dramatically change the visage of the quarterly sales skew.
by Toni Lynn Albers.
S.M.
M.B.A.
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Silvey, James Larry. "Developing a Bible study strategy for church planters to idenitify and cultivate future church leaders". Online full text .pdf document, available to Fuller patrons only, 1999. http://www.tren.com.
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Wilkins, Scott G. "The implementation of male accountability groups as a methodology for developing spiritual leaders in a plateaued church". Theological Research Exchange Network (TREN), 2000. http://www.tren.com.
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YAMAMOTO, Shin-Ichi, 進一 山本, Kohichi IKEGAMI, 康一 池上, Tohru TAJIMI y 暢. 但見. "Gap disturbance regime and tree replacement pattern in a coastal old-growth evergreen broad-leaved forest, southwestern Japan". 名古屋大学農学部付属演習林, 1999. http://hdl.handle.net/2237/8504.
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Uy, K. Kara. "Reassembling a shattered life| A study of posttraumatic growth in displaced Cambodian community leaders". Thesis, Alliant International University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3639883.
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Posttraumatic Growth (PTG) refers to positive psychological change experienced as a result of the struggle with grievous life circumstances that often coexist with significant psychological distress (Tedeschi & Calhoun, 1996). PTG makes clear that persons experiencing this phenomenon have grown beyond their previous level of psychological functioning. PTG is recognized in four domains of change, including perception of self, relationships with others, philosophy of life, and spiritual transformations (Tedeschi & Calhoun, 1996). The present study explored the concept of PTG and transformation among twelve Cambodian community leaders who are survivors of the Khmer Rouge genocide. Based on a phenomenological qualitative paradigm, this study utilized the PTG model to explore coping, meaning making, and positive growth as both a process and outcome. Four core themes emerged for the process of posttraumatic growth: (a) separation, loss, enslavement and other dehumanizing experiences; (b) distress and psychological responses to trauma; (c) methods of coping used to manage debilitating distress; and (d) process of healing and meaning making. Five core themes emerged for the outcome of posttraumatic growth: (a) gratitude and greater appreciation of life; (b) new priorities and goals; (c) importance of family and interpersonal relationships; (d) increased personal strength; and (e) effective leadership. Overall, principal findings in this study highlighted the importance of self-disclosure, hard work, hope, optimism, and education as a foundation to recovery and growth, as well as community activism and the continued pursuit to fulfill their survivor's mission (Herman, 1992). These factors greatly supported participants in their process of PTG and gave them profound life purpose and meaning. Theoretical, societal, and clinical implications of findings as well as future directions are discussed.
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Boujakly, Georges. "Training in spiritual growth for selected leaders from Kansas/Nebraska Convention of Southern Baptists". Theological Research Exchange Network (TREN), 2007. http://www.tren.com/search.cfm?p054-0271.
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Jean, Mario Andre. "Training the leaders of the Jerusalem Baptist Church for growth through proclamation and service". Theological Research Exchange Network (TREN), 2005. http://www.tren.com.
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Molina, Realpe Norányeli Paola. "RPK growth modeling for passenger airlines using network-related variables". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122578.
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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2019, In conjunction with the Leaders for Global Operations Program at MITThesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 100-107).
On average, an airline starts to place orders or aircraft within 3 - 10 years before the expected delivery date. During this time, there could be changes given the natural response of the airlines to continuously refine their fleet plan. This behavior implies many possible scenarios that aircraft manufacturers would like to understand and predict in order to improve their backlog management initiatives. Furthermore, demand estimation is always a powerful lever in any production system because it allows the manufacturer to be prepared to address the customer's needs. An airline's network and fleet are dependent on each other. The network is highly dependent on the capabilities of the available fleet but also, the fleet is built considering the network strategy of an airline. Giving this relationship this project aims to develop a set of predictive models based on network-related variables that allow to forecast the RPK growth of an airline in the following 7 years. Most of the available forecast for air passenger traffic focus on economic variables such as fuel price, GDP of the countries, trade index and population among others. This project wanted to explore if network variables had any relationship with future RPKs for an airline. After the analysis of historical data of more than 400 carriers from 2010 to 2017, the results show that although mild, there is an influence of these variables and we could use the resulting forecast with a solid reliability. Furthermore, the final coefficients show more influence of these variables for short-haul (less than 2500 nautical miles) and Economy markets than long-haul and Business markets. For Boeing and its current backlog size of more than 5,800 aircraft [1], the resulting models represent another tool that will aid the company in making data driven decisions regarding aircraft production, new orders to come, evaluation of current and potential customers, and other business analysis.
by Norányeli Paola Molina Realpe.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
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Ferguson, Steve. "The research of selected church growth issues and development of a church growth workshop for key leaders in the Ebenezer Baptist Church, Dacula, Georgia". Theological Research Exchange Network (TREN) Access this title online, 2004. http://www.tren.com.
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Meeker, Timothy J. "Live Yeast Cell Derivative leads to rapid phosphorylation of Epidermal Growth Factor Receptor". University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337888734.
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Bue, Erik C. (Eric Christophe) 1973. "Leverage viral growth inherent in mobile peer-to-peer telematics to strategic advantage". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34747.
Texto completoResumen
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2004.Includes bibliographical references (p. 136-139).
Telematics, defined as the vehicle features and services made available through a wireless connection to data or other resources not onboard the vehicle, provides one of the most promising areas of innovation and value creation in the automobile market today. However, up to now the US market has only experienced successful telematics businesses in the quazi-insurance field of Safety and Security. In contrast, Consumer Telematics, defined as the confluence of consumer electronics and vehicle telematics, presents a much more exciting market opportunity. In spite of this, inadequate bandwidth, poor usability, fragmented standards and excessive cost have together created sufficient barriers so as to deter any automakers from entering the market. In this thesis, we argue that the viral growth inherent in Wi-Fi class mobile peer-to-peer (mP2P) telematics presents an opportunity for an automotive OEM with significant marketshare to transcend these barriers, and thus capture significant value from this up-to-now elusive market. To do so, we analyze the proposed business through the filters of technology, value chain, applications and market dynamics in order to craft a comprehensive strategy for entering the market and insuring sustained return through its maturation. The technology analysis both presents the potential benefits and limitations of mP2P as well as likely competitors and substitutes. It suggests that mP2P has a sustainable cost and bandwidth advantage over other architectures. Our examination of the Telematics value chain indicates that the wireless connectivity and IP backhaul segments of the chain are predisposed towards commodization and thus should be outsourced in a manner that retains flexibility to switch carriers and even technologies as the market
(cont.) evolves. By segmenting the most promising applications according to their connectivity demands, we plot out how service offerings should evolve in concert with the quality of wireless connectivity and market adoption. Finally, analyzing the market dynamics indicates the critical mass threshold where customer willingness-to-pay exceeds the cost, and thus the trade-offs between investment and strategy necessary for success. We conclude that this critical mass where viral growth ensues exists at only 3-5% market penetration, a target easily achieved by an Automotive OEM with dominant marketshare such as General Motors. The proposed strategy resulting from this analysis endeavors to ensure sustained return by embracing an evolving business model. While initial value is captured through vehicle differentiation, it then shifts to primarily service revenue. Eventually, if the business is successful in garnering widespread adoption, value would eventually be principally derived through hardware licensing and operating system revenue. In the end, the key to success for the OEM is to set aside its traditional ways of doing business in order to leverage the complementary market forces that drive viral growth. Without this, this business is daunting and risky ...
by Erik C. Bue.
S.M.
M.B.A.
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Ngorosha, Trevor. "SCHOOL LEADERS MAKING MEANING OF THEIR FIELD-BASED DEVELOPMENTEXPERIENCES FOR LEADERSHIP GROWTH: A PHENOMENOLOGICAL STUDY". Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1437413330.
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Knudsen, William K. "From surviving to thriving effectively training lay leaders to identify attitudes and behaviors that enhance or inhibit congregational growth /". Theological Research Exchange Network (TREN), 2007. http://www.tren.com/search.cfm?p075-0074.
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Stein, Randy M. B. A. Sloan School of Management. "Process Intensification of Spodoptera frugiperda (Sf) Cell Growth via Multi-Parallel Bioreactor System". Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127258.
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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020Thesis: S.M., Massachusetts Institute of Technology, Department of Chemical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 101-106).
The objective of this project is to improve the yield of the fed-batch manufacturing process for the production of Flublok influenza vaccine, which was approved by the FDA in 2018. In short, Spodoptera frugiperda (SF+) insect cells are grown to a specific target cell density and then infected with baculovirus containing the gene of interest (GOI). For this particular process, the recombinant hemagglutinin (rHA) is extracted from the cell and used to produce the influenza vaccine. Protein Sciences developed a fed-batch process which improved on the traditional batch process by feeding supplementary nutrients to boost cell growth. The Fed-Batch process doubled the target cell density at the time of infection which resulted in a two-fold increase in the final yield of rHA and a 30% reduction in cost of goods. This Fed-Batch process can be further optimized to increase rHA yield and reduce the cost of goods. It is important to note that simply increasing cell biomass is not enough; the cells must also be able to produce rHA at a similar specific productivity in order to increase the yield. Exploratory process improvement experiments were performed on the ambr250 ® multi-parallel bioreactor system, with the goal of identifying the growth conditions for maximizing SF+ cell density. The conditions yielding the best results from these experiments were replicated in 3L glass bioreactors. Using data from these experiments, an optimized Fed-batch process can be developed. In addition, a statistical model was developed to relate key process parameters to SF+ cell density. This model can be used to quantitively ascertain how cell density is impacted by changing process parameters.
by Randy Stein.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Chemical Engineering
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Bjelvert, Oscar y Markus Tornberg. "How to get MSME to leave the nest and grow their business. : By investigating managerial skills as a course of action in the Tanzanian business environment". Thesis, Linköpings universitet, Företagsekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157986.
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To achieve poverty alleviation as stated by the UN’s global goals and agenda 2030 more research in the field is needed. The MSME segment has a vital role to play for economic growth in developing countries. However, no clear growth has been seen for these enterprises even though much aid has been given. Efforts to create a business training system has been made but will play a bigger role in the future. Thru a comparative cross-sectional study it is showcased what skills are connected to enterprise growth. This study aims to help explain what managerial skills should be further investigated when it comes to investing time and resources in business training systems. By interviewing the MSME managers on site and discussing the matter with CEO’s of business training organizations unique data was collected. With the help of NVivo software data is processed and categorized. Final correlations to growth by examining the differences between growing and non-growing managers skills in different fields. Similarities in skills prioritized between managers in growing and non-growing was detected. Findings suggest that business plan and accounting skills are more present in growing enterprises. Ultimately the differences were not enough to demonstrate managerial skill as a strong contributor to enterprise growth.
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Koenigs, Leslie E. (Leslie Erin) 1973. "A "go to market" strategy : enabling P&G profitable share growth through streamlined logistics". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/34721.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2002.Includes bibliographical references (leaf 75).
The cosmetics industry is an intensely competitive, fashion-driven industry. As such, new product launch processes are viewed to be a competitive advantage in promoting continued brand awareness in the market place. However, very few resources are in place to encourage manufacturer and retailer collaboration and to monitor new product launches during launch and after the initial 3-6 month promotion period. As a result, large trade inventories and product return charges negatively impact both the profitability of the manufacturer, Procter & Gamble (P&G), as well as their retail customers. This thesis concentrates on supply chain management methods to enhance the profitability of launching new products in the cosmetics industry to both P&G and one retail customer, Retailer A. Of the retailers that P&G sells cosmetics through, Retailer A represents one of the largest opportunities to reducing trade inventory and product return charges. An analysis presented in this thesis revealed that Retailer A ordered an average of 18 months of a new product during the first 2-3 months of launch for products released in the January 2000- May 2001 period. Research was conducted during a six and a half month internship within P&G's Product Supply group at the Cosmetics Division in Hunt Valley, MD. The internship was affiliated with the Massachusetts Institute of Technology's Leaders for Manufacturing Program. Outputs of this work include a high-level strategy for launching new products within this division, as well as logistics tactics developed via a dynamic supply chain model. Through theoretical and simulation analysis, the project revealed that implementing unique stocking and reordering strategies for launching new products based on item type and retail store sales volume results in significant savings to P&G and Retailer A. For Retailer A alone, the impact of implementing the project recommendations is estimated to be approximately a one million dollar reduction in final retail inventory, which translates into between a half a million and a one million dollar reduction in P&G's product return charges. In addition, an in-stock improvement opportunity is estimated to be one hundred and thirty thousand dollars, translating directly to improved service for the final consumer.
by Leslie E. Koenigs.
S.M.
M.B.A.