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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the 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.
201

AGES OF PREHISTORIC EARTHQUAKES ON THE BANNING STRAND OF THE SAN ANDREAS FAULT, NEAR NORTH PALM SPRINGS, CALIFORNIA

Castillo, Bryan 01 June 2019 (has links)
We studied a paleoseismic trench that was excavated across the Banning strand of the San Andreas Fault by Petra Geosciences (33.9172°, -116.538°). The trench exposed a ~40 m wide fault zone in interbedded alluvial sand gravel, silt and clay deposits. We present the first paleoseismic record for the Banning strand of the southern San Andreas Fault. The most recent event occurred sometime between 730 and 950 cal BP, potentially coincident with rupture of the San Gorgonio Pass thrust. We interpret that five earthquakes have occurred since 3.3-2.5 ka and eight earthquakes have likely occurred since 7.1-5.7 ka. It is possible that additional events may have occurred without being recognized, especially in the deeper section the stratigraphy, which was not fully exposed across the fault zone. We calculate an average recurrence interval of 380 - 640 yrs based on four complete earthquake cycles between earthquakes 1 and 5. The average recurrence interval is thus equivalent to or less than the elapsed time since the most recent event on the Banning strand. The recurrence interval is similar to the San Gorgonio Pass (450-1850 years) but longer than that for the Mission Creek strand (~220 years).
202

An Investigation of the Malaysian Palm Oil Industry’s Environmental Strategies, Stakeholders’ Pressure, Environmental Effectiveness and Competitive Advantage

Yaacob, Mohd Rafi January 2007 (has links)
Research Doctorate - Doctor of Philosphy (PhD) / Over the last three decades there has been increasing pressure from stakeholders on businesses to be environmentally responsible. Business organisations cannot help but take this consideration seriously because it has a far-reaching impact on their very survival. This research is intended to bring insights into how and why a business’s management responds to environmental pressure from stakeholders. How a business responds to its stakeholders is known as environmental strategy. In addition, this study also investigates how proactiveness in implementation of each type of environmental strategy impacts on a business’s environmental effectiveness and competitive advantage. In Malaysia palm oil is the most important agricultural commodity in the country, and contributes substantially to the economy. Unfortunately, its activities are not without environmental costs. Deforestation, depletion of flora and fauna, excessive use of chemicals, air and water pollution are the results of the industry’s activity. But due to stakeholders’ pressures, the industry has embraced environmental management in its activities, albeit at a slow pace. Against this background, this study seeks to investigate the efficacy of corporate environmentalism, using a number of palm oil companies as case studies. This study is paramount as no such study has previously been conducted in Malaysia. The Malaysian palm oil industry offers an interesting case for studying corporate environmentalism in developing countries. Using a mixed-methods or triangulation of analysis of nine palm oil companies, which are listed on the Kuala Lumpur Stock Exchange, as case studies, this research investigates the environmental practices of the palm oil companies, and the relationship of these practices with stakeholders’ pressures, environmental effectiveness and competitive advantages. The results of the study reveal that three levels of overall environmental strategy are adopted by the participating palm oil companies. They are labelled by the researcher as minimalists - four companies; intermediators - two companies; and proactivists - three companies. The minimalists refer to companies that exercised the lowest environmental strategy, while the proactivists are those who exercised the highest environmental strategy. The intermediators are in the middle, that is, those companies that seem to be in the early stage of becoming proactivists, but have yet to achieve such a level. The proactivists were classified as those who exercised a proactive strategy, but both intermediators and minimalists exercised a reactive environmental strategy. In terms of the relationship between environmental proactiveness and stakeholders’ pressure it was found that the management of the more proactive companies tended to perceive a wider range of threats from environmental stakeholders compared with reactive companies. Apart from regulatory stakeholders, they also perceived pressure from primary stakeholders, especially their top management, as well as secondary stakeholders including ENGOs, competitors, and the media. On the contrary, reactive companies only perceived threats from regulatory stakeholders. Not only did proactivists differ in terms of stakeholders’ pressure, they were at the same time perceived to be more environmentally effective and to gain more competitive advantages than less proactive companies. Based on the research findings it seems there is a significant positive correlation between a proactive environmental strategy and both environmental effectiveness and competitive advantage among Malaysian palm oil companies. In this study measurement of the environmental strategies and environmental effectiveness was solely based on a triangulation of surveys (seven-point scale items) and in-depth interviews. In order to increase the validity of the study, future researchers need to triangulate these data with other quantitative data. For instance, at a company level, a company’s resources can be measured based on its financial statistics such as sales, net profit, return on investment, and the amount spend on research and development. Moreover, the environmental effectiveness of a mill can be measured in terms of monthly data of biochemical oxygen demand (BOD), of palm oil mill effluents and Ringelmann Chart of air emissions, and the amount of money expended on de-sludging for certain periods of time. In both plantations and mills, future researchers can gather data related to environmental accidents, fines and court cases. The key findings of this research are instructive. The majority of the participating palm oil companies in Malaysia adopted reactive environmental strategies. Only a few adopted proactive environmental strategies, and they were more likely to exercise environmental practices at strategic and tactical levels such as top management involvement in environmental issues as well as deploying environmental management systems which mostly related to the bottom line of their businesses. Serious attention towards the destruction of the tropical rainforest as a result of their activities is lacking among participating companies.
203

Stay below water! - a strategy to avoid seed predators : - seed survival and germination of Mauritia flexuosa in southeastern Peru

Johansson, Björn January 2009 (has links)
<p>The tropical palm <em>Mauritia flexuosa </em>has highly nutritious fruits and is an important food resource for both humans and wildlife throughout its geographic range in South America. Unsustainable harvesting threatens wild populations. <em>Mauritia f</em>. occurs primarily in wetlands called Aguajales where it can become the dominating canopy species. Seed predation and dispersal can dramatically affect the survival and distribution of plant species in tropical rainforests (Janzen 1970, Connell 1971, Bleher & Böhning-Gaese 2001, Paine & Beck 2007, Mari et al. 2008). Increased knowledge of seed predation and germination requirements is essential for successful management of this commercially and ecologically important palm. Four experiments were conducted in Manu National Park in southeastern Peru to study: (1) Seed survival in the Aguajal, (2) Quantify seed predators on dry land, (3) Insect visitors and consumers of fruits and seeds, and (4) Germination in greenhouse experiments. Seed survival was significantly higher below water compared to on dry micro sites within the Aguajal. Seeds and fruits placed on dry land were preyed upon by both insects and mammals. Terrestrial insects were the most important predators. Different insects visited fruits and seeds, indicating a successive breakdown of different tissues. Seed survival was also higher below water and/or soil in the greenhouse experiment. This may suggest that the distribution of <em>Mauritia f</em>. is highly influenced by seed predation and that water protects seeds from their insect enemies.</p>
204

Kort och gott : Relationen mellan form och innehåll i tre kortare prosatexter

Lidén, Johanna, Bergquist, Ann-Charlotte January 2010 (has links)
<p>Utgångspunkten för uppsatsen är att studera relationen mellan vissa aspekter av form och innehåll i tre kortare prosatexter. Dessa aspekter är framförallt berättarinstans, berättelsens uppbyggnad, och det i två av texterna utryckliga temat förändring. De valda texterna är kortromanen <em>På Chesil Beach </em>av Ian McEwan (2007), novellen ”Döden i Damaskus” av Anna-Karin Palm (2001) och kortromanen <em>Berömmelse</em> av Daniel Kehlmann (2010).</p><p>Litteraturvetenskapliga perspektiv och analysredskap är valda med tanke på att en av texterna påstår något om berättarens funktion, och att en av de andra texterna resonerar kring vad en berättelse är. De narratologiska verktygen faller sig därför naturliga. Den hermeneutiska metoden används i begränsad utsträckning för tolkningen av texterna. Resultatet av studien visar att texternas uppbyggnad<strong> </strong>i två av fallen tydligt medverkar till att gestalta texternas teman. Den vid första anblicken postmoderna texten <em>Berömmelse</em> – <em>Roman i nio historier</em> (2010) visar sig ha en mer sammanhängande struktur än som kanske märks vid en första snabb genomläsning. I samtliga tre texter är karaktärerna bärare av temat.</p>
205

Stay below water! - a strategy to avoid seed predators : - seed survival and germination of Mauritia flexuosa in southeastern Peru

Johansson, Björn January 2009 (has links)
The tropical palm Mauritia flexuosa has highly nutritious fruits and is an important food resource for both humans and wildlife throughout its geographic range in South America. Unsustainable harvesting threatens wild populations. Mauritia f. occurs primarily in wetlands called Aguajales where it can become the dominating canopy species. Seed predation and dispersal can dramatically affect the survival and distribution of plant species in tropical rainforests (Janzen 1970, Connell 1971, Bleher &amp; Böhning-Gaese 2001, Paine &amp; Beck 2007, Mari et al. 2008). Increased knowledge of seed predation and germination requirements is essential for successful management of this commercially and ecologically important palm. Four experiments were conducted in Manu National Park in southeastern Peru to study: (1) Seed survival in the Aguajal, (2) Quantify seed predators on dry land, (3) Insect visitors and consumers of fruits and seeds, and (4) Germination in greenhouse experiments. Seed survival was significantly higher below water compared to on dry micro sites within the Aguajal. Seeds and fruits placed on dry land were preyed upon by both insects and mammals. Terrestrial insects were the most important predators. Different insects visited fruits and seeds, indicating a successive breakdown of different tissues. Seed survival was also higher below water and/or soil in the greenhouse experiment. This may suggest that the distribution of Mauritia f. is highly influenced by seed predation and that water protects seeds from their insect enemies.
206

Stability and Non-stationary Characteristics of Queues

Fralix, Brian Haskel 10 January 2007 (has links)
We provide contributions to two classical areas of queueing. The first part of this thesis focuses on finding new conditions for a Markov chain on a general state space to be Harris recurrent, positive Harris recurrent or geometrically ergodic. Most of our results show that establishing each property listed above is equivalent to finding a good enough feasible solution to a particular optimal stopping problem, and they provide a more complete understanding of the role Foster's criterion plays in the theory of Markov chains. The second and third parts of the thesis involve analyzing queues from a transient, or time-dependent perspective. In part two, we are interested in looking at a queueing system from the perspective of a customer that arrives at a fixed time t. Doing this requires us to use tools from Palm theory. From an intuitive standpoint, Palm probabilities provide us with a way of computing probabilities of events, while conditioning on sets of measure zero. Many studies exist in the literature that deal with Palm probabilities for stationary systems, but very few treat the non-stationary case. As an application of our main results, we show that many classical results from queueing (in particular ASTA and Little's law) can be generalized to a time-dependent setting. In part three, we establish a continuity result for what we refer to as jump processes. From a queueing perspective, we basically show that if the primitives and the initial conditions of a sequence of queueing processes converge weakly, then the corresponding queue-length processes converge weakly as well in some sense. Here the notion of convergence used depends on properties of the limiting process, therefore our results generalize classical continuity results that exist in the literature. The way our results can be used to approximate queueing systems is analogous to the way phase-type random variables can be used to approximate other types of random variables.
207

Analysis of Fuel Performance and Exhaust Emissions of Ultra-low Sulphur Diesel Blending with Biofuels

Chen, Kung-Fu 17 February 2005 (has links)
This study investigated the fuel properties, engine performances, and emissions of two biodiesels and diesel. The fuels examined were D100 (ultra-low sulfur diesel), B20 (20% palm biodiesel +80% ultra-low sulfur diesel) and B100 (palm biodiesel). The fuel properties analysis results showed that the benefits of biodiesel were high cetane value, extremely low sulfur and aromatic contents, and good lubricity. While the defects of biodiesel were high pour point. The particulates emitted from the burning of D100, B100, B20 were mainly fine particulates, also known as young aerosols. Particles smaller than 2.5 &#x00B5;m easily enter the trachea and bronchus via the upper respiratory tract, finally deposit on the alveolus, which could cause severe injury to human health. The emission of soluble organic fraction (SOF) from diesel engine using D100, B100 and B20 were 23.2%, 19.9% and 20.2%, respectively. The SOF of D100 is slightly higher than B100 and B20. It suggested that adding biodiesel into diesel can decrease SOF and thus reduce the potential danger to human health. The original total PAHs concentration of tail gas emitted from engines using D100, B100 and B20 were 241, 50.6 and 98.8 &#x00B5;g/m3, respectively. Adding 20% biodiesel into D100 could reduce 59.0% of PAHs emission. Moreover, the original total BaPeq concentration of tail gas emitted from diesel engines using D100, B100 and B20 were 0.714, 0.509 and 0.570 &#x00B5;g/m3, respectively. Adding 20% biodiesel into D100 could also reduce 20.2% of total BaPeq emission. Hence, adding biodiesel into diesel can effectively reduce the emission of PAHs and the potential danger to human health. The emission factors of carbonyl compounds from diesel engines using D100, B100 and B20 were 395, 1,170 and 326 mg/BHP-hr, respectively. carbonyl compounds of B100 were obviously higher than D100 and B20. The results indicated that using pure palm biodiesel in diesel engine can increased the emission of carbonyl compounds. However, adding 20% biodiesel into D100 can effectively reduce 17.5% of carbonyl compounds emission. Keyword: ultra-low sulfur diesel, palm biodiesel, fuel properties¡BThe emission of soluble organic fraction (SOF)¡BPAHs¡Bcarbonyl compounds¡C
208

The Feasibility study of using Palm oil as the lubricant of Automative Engine

tzeng, jason 19 August 2001 (has links)
In general,the lubricants were composed by basestock and additive,and the basestock is usual use mineral oil. This paper examines the viscosity,viscosity index and antiwear properties of palm oil blended lubricants. To study the feasibility of using palm oil as the lubricant of automative engine . The V.I. of commercial sae 30 engine oil will increase from 101 to 147 via the blend of palm oil and SAE 30.The anti-wear charactisteristics test in a four-ball tribometer.Under conditions of 40kg,1200rpm,and a test duration of one hour at 120 ¢J. The test oil appear markedly superior to the reference SAE 30 engine oil .The palm oil blended lubricant showed is reduced to 10% scar than reference oil .
209

Palm Programmierung unter Linux

Jahre, Daniel 12 March 2002 (has links)
Die PDAs von Palm Inc. und seinen Lizenznehmern werden gerne zur Adress- und Terminverwaltung eingesetzt. Damit ist ihr Leistungspotential jedoch nicht erschöpft. Wer gerne selbst Applikationen für Palm PDAs entwickeln möchte, ist dabei nicht zwingend auf eine windowsbasierte Entwicklungsumgebung angewiesen. Unter Linux gibt es Compiler, Ressourceeditoren und Emulatoren für PalmOS. Ich werde in meinem Vortrag diese Werkzeuge vorstellen, demonstrieren und ein Beispielprogramm zeigen.
210

Assessing the importance of rainforests and their associated fauna in providing ecosystem services to oil-palm plantations

Cockerill, Timothy David January 2013 (has links)
No description available.

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