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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 311 to 317 of 317 (0.033 seconds)| 311 |
Evolução das franqueadoras de serviços no Brasil: um estudo das variáveis que influenciam a taxa de sobrevivência das empresas sob a ótica da Ecologia OrganizacionalHolzmann, Patricia Fabian 03 March 2009 (has links)
Made available in DSpace on 2016-03-15T19:26:44Z (GMT). No. of bitstreams: 1
Patricia Fabian Holzmann.pdf: 616808 bytes, checksum: e166252bee6ff56d9a6645cc9d778c3c (MD5)
Previous issue date: 2009-03-03 / This study has analyzed the service franchising enterprises evaluating factors that influence the survival rate of this population under the Organizational Ecology theory. The dynamics of the evolution process of this population was analyzed considering the density dependence model connected to legitimation and competition. Such factors, as well as size, were tested in statistic models (panel, logit and probit) using the data base developed with the information presented in the Guias da Associação Brasileira de Franquias between 1996 and 2007, to evaluate their impact over the population survival rate. Other relevant factors raised in Evolutionary Economics and Service Market Organization were also discussed. / Este estudo analisou as franquias de serviços avaliando os fatores que influenciam na taxa de sobrevivência dessas empresas sob a ótica da Ecologia Organizacional. A dinâmica da evolução da população de franquias de serviços foi avaliada com base na densidade da população e processos de legitimação e competição. Tais fatores, assim como o tamanho, foram testados em modelos estatísticos (modelo econométrico de painel, logit e probit) utilizando base de dados desenvolvida com base nos Guias da Associação Brasileira de Franquias entre o período de 1996 e 2007, para avaliar seu impacto sobre a taxa de sobrevivência da população. Com base nas teorias de Economia Evolucionária e Organização de Mercado em Serviços outros fatores relevantes para a sobrevivência das franquias de serviço também foram discutidos.
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The role of tree height and wood density for the water use, productivity and hydraulic architecture of tropical treesLink, Roman Mathias 19 February 2020 (has links)
No description available.
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An assessment of the trees of the Greening Soweto Tree Planting Project in Johannesburg, South AfricaVan Staden, Elizabeth Margaret 11 1900 (has links)
The Greening Soweto Tree Planting project in the City of Johannesburg, South Africa, was a
greening initiative aimed at ensuring that benefits of the 2010 FIFA World Cup, presented that
year in the country, extended beyond the event. In assessing the trees of this project, it was
confirmed that the target number of trees consisting mainly of indigenous tree species were
planted predominantly as street and park trees in previously disadvantaged areas, traditionally
known to have the least trees in the city. The survival rate of the project is estimated to be
43.46%, implying inadequacies in tree planting and management of the project and
necessitating guidelines with recommendations to improve tree planting practices in the city.
Growth relationship equations for Olea europaea subsp. africana and Searsia lancea were
developed and the growth parameter analysis reveals that all trees grow better in parks but C.
africana trees should rather be planted on sidewalks than on medians, S. lancea trees should
preferably be planted on medians and C. erythrophyllum may be planted on sidewalks or
medians as they would grow well in both locations. It is estimated that this project contributed 30 390.11 tCO2 of standing carbon stocks valued at R3 646 812,87 or US$303,901.07
(assuming a CO2 price of US$10.00) in 2017 and could potentially contribute 387 170.93 tCO2
of sequestered carbon stocks valued at R46 460 511,82 or US$3,871,709.32 by 2031 as
mitigation action against climate change. A positive connection impacting the growth of the
trees has been identified between land use, land cover and maintenance, indicating that the
best locations for trees are maintained parks and formal residential areas as well as paved
areas where irrigation is provided. The presence of pests and diseases, conflict with overhead
structures and roads and a lack of pruning negatively impacted the growth of the trees.
Guidelines for new tree planting projects have been developed with recommendations to
maintain the canopy cover percentage in the established urban forest, enhance tree planting
in the previously disadvantaged regions, improve the survival rate of new tree planting projects
and establish community engagement forums to inform future tree planting of the city. / Environmental Sciences / Ph. D. (Environmental Management)
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Study on the effects of matrix properties on the mechanical properties of carbon fiber reinforced plastic composites / 炭素繊維強化複合材料の機械特性に及ぼす母材特性の影響に関する研究 / タンソ センイ キョウカ フクゴウ ザイリョウ ノ キカイ トクセイ ニ オヨボス ボザイ トクセイ ノ エイキョウ ニカンスル ケンキュウ邵 永正, Yongzheng Shao 22 March 2015 (has links)
It was found that a significant improvement of mechanical properties of CFRPs can be achieved by the adjustment of the matrix properties such as toughness and CF/matrix adhesion via the chemical modification, as well as the physical modification by a small amount of cheap and environment-friendly nano fibers. Based on investigation of fracture mechanisms at macro/micro scale, the effects of matrix properties and nano fiber on the mechanical properties of CFRP have been discussed. Subsequently, the relationship has been characterized by a numerical model to show how to modulate the parameters of the matrix properties to achieve excellent fatigue properties of CFRP. / 博士(工学) / Doctor of Philosophy in Engineering / 同志社大学 / Doshisha University
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半導體晶圓廠投資策略與預測莊坤榮 Unknown Date (has links)
在全球持續電子化的過程中，台灣一路扮演著落實有效製造與實現設計的推手，無論從主機板、被動元件、面板、晶片設計、晶圓製造以及封裝甚至高精密組裝無所不包，在如此資本密集產業，如何操作才能達到供需平衡，為整體產業經濟創造出良性的競爭平台，避免惡性競爭，就成了不可輕忽的課題。
本文以晶圓產業為探討對象。全球產能平均利用率多年來總維持於中檔 (88%)， 且平均銷售單價只能緩降而無強勢反彈，近年企業無不減少資本支出來度過低潮，整合元件製造廠(IDM)相繼喊出工廠資產輕化(fab-lite)的營運策略，這時我們的命題即是：要不要繼續投資？如何調整價值鏈？
本研究中，我們會先檢視目前市場對半導體成長預測的準確度，再經由產業價值活動代表性指標回歸分析法對相關參數做一整合之解析，對晶圓需求量與銷售價建立配適之模型，找出先行指標來達到預測，並定義上下限以供快速比對分析，最後再根據分析結果提出可能之產業趨勢議題。 / This thesis analyzes the semiconductor industry growth worldwide. The leading index via regressions has been established to achieve a reliable forecast on worldwide ASP, wafer demand and revenue.
In the long run, we expect the semiconductor demand will continue to grow at CAGR 8% (compound annual growth rate) and display less extreme cycles than past decade. However, revenue’s CAGR might be diluted to around 5%, lower than demand’s growth. Moreover, it might go down to zero-growth for some times since the ASP still slightly trend down before emerging market demand really expanded.
Continuous outsourcing is one possible solution for IDM to be fab-lite, since fab’s fix charge is billion- base that needs high utilization to maintain break-even operation. But what is the solution for foundry side to avoid ASP erosion all the way down? Our analysis identifies a need for executive managers to well predict the demand on capital expenditure when making decision.
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Variational and Ergodic Methods for Stochastic Differential Equations Driven by Lévy ProcessesGairing, Jan Martin 03 April 2018 (has links)
Diese Dissertation untersucht Aspekte des Zusammenspiels von ergodischem Langzeitver-
halten und der Glättungseigenschaft dynamischer Systeme, die von stochastischen Differen-
tialgleichungen (SDEs) mit Sprüngen erzeugt sind. Im Speziellen werden SDEs getrieben
von Lévy-Prozessen und der Marcusschen kanonischen Gleichung untersucht. Ein vari-
ationeller Ansatz für den Malliavin-Kalkül liefert eine partielle Integration, sodass eine
Variation im Raum in eine Variation im Wahrscheinlichkeitsmaß überführt werden kann.
Damit lässt sich die starke Feller-Eigenschaft und die Existenz glatter Dichten der zuge-
hörigen Markov-Halbgruppe aus einer nichtstandard Elliptizitätsbedingung an eine Kom-
bination aus Gaußscher und Sprung-Kovarianz ableiten. Resultate für Sprungdiffusionen
auf Untermannigfaltigkeiten werden aus dem umgebenden Euklidischen Raum hergeleitet.
Diese Resultate werden dann auf zufällige dynamische Systeme angewandt, die von lin-
earen stochastischen Differentialgleichungen erzeugt sind. Ruelles Integrierbarkeitsbedin-
gung entspricht einer Integrierbarkeitsbedingung an das Lévy-Maß und gewährleistet die
Gültigkeit von Oseledets multiplikativem Ergodentheorem. Damit folgt die Existenz eines
Lyapunov-Spektrums. Schließlich wird der top Lyapunov-Exponent über eine Formel der
Art von Furstenberg–Khasminsikii als ein ergodisches Mittel der infinitesimalen Wachs-
tumsrate über die Einheitssphäre dargestellt. / The present thesis investigates certain aspects of the interplay between the ergodic long
time behavior and the smoothing property of dynamical systems generated by stochastic
differential equations (SDEs) with jumps, in particular SDEs driven by Lévy processes and
the Marcus’ canonical equation. A variational approach to the Malliavin calculus generates
an integration-by-parts formula that allows to transfer spatial variation to variation in the
probability measure. The strong Feller property of the associated Markov semigroup and
the existence of smooth transition densities are deduced from a non-standard ellipticity
condition on a combination of the Gaussian and a jump covariance. Similar results on
submanifolds are inferred from the ambient Euclidean space.
These results are then applied to random dynamical systems generated by linear stochas-
tic differential equations. Ruelle’s integrability condition translates into an integrability
condition for the Lévy measure and ensures the validity of the multiplicative ergodic theo-
rem (MET) of Oseledets. Hence the exponential growth rate is governed by the Lyapunov
spectrum. Finally the top Lyapunov exponent is represented by a formula of Furstenberg–
Khasminskii–type as an ergodic average of the infinitesimal growth rate over the unit
sphere.
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Évolution dans des populations structurées en classesSoares, Cíntia Dalila 05 1900 (has links)
No description available.
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