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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.
451

Green Water Flow Kinematics and Impact Pressure on a Three Dimensional Model Structure

Ariyarathne, Hanchapola Appuhamilage Kusalika Suranjani 2011 August 1900 (has links)
Flow kinematics of green water due to plunging breaking waves interacting with a simplified, three-dimensional model structure was investigated in laboratory. Two breaking wave conditions were tested: one with waves impinging and breaking on the vertical wall of the model at the still water level and the other with waves impinging and breaking on the horizontal deck surface. The incoming wave parameters were selected similar to observed wave parameters for the maximum wave height for Hurricane Ivan based on Froude scaling. The Bubble Image Velocimetry (BIV) technique was used to measure the flow velocity. Measurements were taken on a vertical plane located at the center of the deck surface and a horizontal plane located slightly above the deck surface. The evolution of green water flow kinematics in time and space is revealed in the study. The unsteady and non-uniform velocities were found to be quite different between the two wave conditions, even though the incoming waves are nearly identical. It was observed that the maximum velocity appears near the green water wave front and is 1.44C with C being the wave phase speed for the deck impingement case and 1.24C for wall impingement case. The velocity variations in the present study were compared with that in an earlier study using a two-dimensional model with the same wave condition as in the wall impingement condition. It was found that the magnitudes of the maximum vertical velocity is very different between these two models (1.7C in the 3D model versus 2.9C in the 2D model), whereas the magnitudes of the maximum horizontal velocity on the deck are very similar (1.2C in both 3D and 2D models). The applicability of dam-break theory on green water velocity prediction for the three-dimensional model was also investigated. It was found that the dam-break theory works very well in terms of predicting the maximum velocity, which is also the front velocity, but not the spatial distribution of the velocity on the deck. Furthermore, pressure measurements were performed at two vertical planes: one at the centre and the other at 0.05 m away from the centre. Ensemble averaged pressure variations were compared. Two types of pressure variations, impulsive type and non-impulsive type were observed. Impact pressure was successfully related to the pressure rising time. Void fraction was measured for few locations near the model front edge. Predictions of maximum impact pressure based on the measured pressure and flow velocity were investigated linking pressure with kinetic energy. Constant impact coefficient of 1.3 was found for wall impingement wave. However, for deck impingement wave, it was not possible to find a constant impact coefficient. It was also found that there is a linear relationship between the rising pressure gradient and the impact coefficient.
452

Survival and Developmemt of Issue Parties A Study with the Green Party of Germany and the New Party of Taiwan as examples

Hsu, Ya-Wen 27 August 2003 (has links)
Abstract Both the Green Party of Germany and the New Party of Taiwan are minority political parties. Yet, they both play a critical role. Their party line is explicitly defined. For the Green Party, they appeal to ¡§Ecological Issues¡¨ and gaine their support from new social movements. As for the New Party of Taiwan, they appeal to ¡§Issues of Anti-Independence of Taiwan and Anti-Black Money¡¨ as their national identification. This has its root in the 1990s, when Taiwan was overheated by the issue of declaring independence or unification with Mainland China. In Germany, the Green Party has successfully constrained the development of nuclear industry, and gained strong support from the public in social well-beings. In Taiwan, the New Party also claims to speak for the common people. This posture enabled the New Party to win high popularity in Metropolitan Taipei, and exert high pressure to the Kuomintang. Indeed, the New Party has had stirred up a hurricane in Taiwan. However, this did not last long. The appeals of both parties have been incorporated into the guidelines and agendas of other larger political parties as well. This was deteriorated by the egocentrism of the key leaders of the parties. As such, the parties were divided, and those leaders tended to play one off against another. They both faced the crisis of disintegration and failure as the third choices for the public in political participation. The Green Party has revised its party line and compromised with reality. They formed a coalition with the Social Democratic Party and won the election of the Bundestag in 1998. A coalition government between the red and green was formed in Germany. In the election of the Bundestag in 2002, the same coalition won again. Indeed, the Green Party has performed exceptionally outstanding in the recent election. They won 8.6 % of the votes, the highest in the history of the Green Party. The New Party in Taiwan adopted the slogan of ¡§ Bring Down Lee Teng-Hui and Protect the Republic of China¡¨ as their appeal. However, some of the topics in their agenda have been absorbed by other political parties. They hardly won support by spelling out this slogan for a number of reasons. Lee Teng-Hui completed his term in 2000. Nativisim has gained momentum in Taiwan. The tension between Taiwan and the mainland intensified. The homogenous People First Party was founded. The strife inside the New Party intensified, coupled with the exodus of elites. All these events severely hampered the reputation of the New Party and their efforts in the election. Therefore, they lost in the election of the Legislative Yuan in 2001, with humiliation. Outsiders describe their downfall as a bubble. Nevertheless, the New Party revitalized themselves by appealing to the common people, which enabled them to win 5 seats in the City Council of Taipei in the 2002 election. This success changed the attitude of the others towards the New Party, as they felt that this party is going to rejuvenate. Therefore, the rise and fall of the Green Party of Germany and the New Party of Taiwan and their strategies for development may well be served as cases for the study of political parties that appeal to political agenda.
453

The Study of Green Fiscal Reform and Management ¡XA Case Study of Kaohsiung City

Hung, Tung-wei 18 May 2004 (has links)
For the last few years, the financial imbalance and the environmental deterioration are gradually serious in the various level of government. The formulating process of environmental and financial policies usually neglects the viewpoints of the interested stakeholders so that the insufficient policy information causes the policy deviation and even further leads to the gaps between the policy performance and the expected target. Additionally the ¡§green tax reform¡¨ has become the trend worldwide. In the past few years, various countries gradually switch from administrative control to tax measures to facilitate the environmental protection. Through economic incentives and market mechanism, it will more effectively achieve the goal of industrial greening and will produce the double dividend in the improvement of environmental quality and the distortion alleviation of tax system. The research studies the contents of the environment related tax (fee) system and the green tax reform or the green reform experiences in the European countries and the States, meanwhile the research takes Kaohsiung city as empirical case. Besides the research applies the social judgment theory (SJT), SAGE and one-way analysis of variance to separately evaluate the acceptability of current implemented improvement plan for the income application mechanism of air pollution control fee and to study the viewpoints on special tax and temporary tax imposed by Kaohsiung city. The results of empirical study find out the tested interested stakeholders or groups prefer the income application mechanism of air pollution control fee to be changed toward the mechanism of complete gaining and expenditure. There are no significant gaps in the recognition consistence of the related interested stakeholders. In addition, no significant gaps are occurred in the judging similarity value or judging principle similarity value among interested stakeholders. In the meantime the tested interested stakeholders also support the Kaohsiung city government imposes the special tax and temporary tax in the future. The results and suggestions indicate the tax could be levied including special petroleum refining tax, special steel refining tax, special noise pollution tax in the civil airport, special road maintenance tax of incoming and outgoing container cars in the harbor, resident income special tax, temporary vendors management tax in the evening retail market, temporary tax of construction produced soil and temporary tax of residential and land renewal and development. There are no significant gaps existed in the opinions of tested interested stakeholders on special tax levy. However the gaps are occurred in the opinions of temporary tax levy, it may be because of tax object and levied procedure or being limited by tested samples so that different age groups or occupation or resided administrative district produce different results. Additionally the research suggests to increase the business tax rate, to conduct the complete reform of financial income and expenditure, to revise the commodity tax statutes, Air Pollution Control Act, Statutes for Upgrading Industries and local tax and duty regulations, to enhance the environmental effect of consumption tax including the business tax and commodity tax with hope of establishing the sound environmental financial system, environmental order and financial discipline. Since the research is restricted by time factor and the sample is not easily controlled, the research doesn¡¦t conduct the further in-depth study in the parts of recognition feedback effect and the comparison or integration of information integration theory. However these parts can be used as the directions of subsequent studies.
454

A study of outsourcing performance of park and green land in Kaohsiung

Li, Chiao-ju 26 June 2007 (has links)
The globalization era has brought along fierce competition and fast connection and contact. To ensure national competitiveness, countries all over the world have conducted various reforms on internal operation and the formulation and implementation of policies. Since the 1980¡¦s, the U.K. and the U.S., by adopting new public management theories on the creation of an efficient government, have promoted the privatization of the public sector, the outsourcing of government¡¦s non-core services and the diversification of public facility management. This paper focus on four park and green land in Kaohsiung as to study the object, addressed the outsourcing performance and matching the depth interview method, entrusting the organization, operator, government, carry on concerning the interview of the dilemma and fruit that meets in the privately owned management process of an area run by private capital. Hope by the sorting review of the related cultural heritage, and "the outsourcing business model of partner's direction" of this research development, has the more thorough understanding to an area in Kaohsiung City, provide the actual situation and the suggestion on the policy. Through the review and study of policy implementation of local governments, the author suggests that local governments should create and supports at the partner up, contain the imperfection that the knowledge management, experience spreads to accept. The passive old bureaucrat mindset of the information, don't understand for the job, also cause three harassment of the manufacturer, government, people in contract. This paper basis "the outsourcing business model of partner's direction" to do the policy and the suggestion on the actual situation, providing the manufacturer, government, people with three aspect the outsourcing management model of join force operate.
455

none

Wen, Pei-zu 11 July 2007 (has links)
none
456

The Study and Implementation of Intracavity Frequency-Doubled Blue/Green Lasers

Huang, Shan-Yu 26 June 2001 (has links)
Because compact solid-state blue/green lasers can generate high power, and short wavelength radiation, it is applied in micromaching, laser display, underwater ranging, and so forth. It is a very cost-effective approach to develop such lasers, if the laser output characteristics can be estimated precisely using software simulation. The purpose of this study is to use an optics software GLAD (General Laser Analysis and Design) to model our intracavity frequency-doubled blue/green lasers. The GLAD software considers the wave nature of laser, such as dispersion and diffraction. Moreover, it employs a modular design in modeling linear or nonlinear optical components. In order to get more precised estimation of the laser output characteristics of a quasi-three-level laser, the laser model in GLAD was modified to take into account the reabsorption loss in gain medium. In our experiment, blue/green microchip lasers were developed. We used a 3W LD to pump a quasi-three-level laser with the Nd:YAG crystal as gain medium and KNbO3 crystal as the intracavity SHG crystal for the generation of blue laser. The laser generates 17.6 mW of blue power with a cavity length of 4 mm. With almost the same structure except using Nd:YVO4 crystal as gain medium and KTP crystal as the intracavity SHG crystal for generation of green laser, the laser produces 627 mW of green power with a cavity length of 6 mm.
457

Factors causing variation between the LEED final and pilot checklists in green health-care projects

Tyagi, Priyanka 01 November 2005 (has links)
Among most of the LEED registered and LEED certified health-care facilities, there is a credit variation between the LEED pilot checklist and the final checklist. The credit variation between the LEED pilot and final checklists implies failure in achieving the pre-defined green objectives. Most of the credits were given up due to financial reasons. Although most of the credits in the LEED credit list emerge as design issues, accomplishing a LEED rating is primarily the owner??s responsibility. In order to minimize the variation between the LEED pilot checklist and LEED approved checklist, the owner needs to conduct significant project planning. The owner should integrate the LEED objectives early in the project and should include the cost of the LEED process in the capital budget. Since there are limited LEED certified health-care projects, adoption of the systems approach for planning and developing a green health-care facility using the IDEF0 method is recommended. The IDEF0 method can produce an outcome array which represents the matrix of all possible circumstances. This will give the owner and the project team the ability to better forecast cost and schedule decisions, even when there is a lack of historical data relating to green health-care projects. The approach will be beneficial in analyzing the various outcomes, cost, and feasibility of projects in terms of integrating LEED objectives early on. This could minimize the credit variation, as well as cost and schedule overruns during the project execution stage. Adequately defining the full development process upfront is vital to the overall success of any project, especially for green buildings, since they are a developing trend in the construction industry.
458

Electrochemical deposition of green rust on zero-valent iron

Kulkarni, Dhananjay Vijay 16 August 2006 (has links)
Perchloroethylene (PCE) is a toxic contaminant that has been introduced into the environment over many years through industrial and agricultural wastes. Research has been done in the past to investigate PCE degradation by zero-valent iron (ZVI), green rust (GR) and a mixture of both. The combination of ZVI and green rust has been reported to be more effective for degrading PCE than either of them alone. Forming green rust electrochemically has the potential for depositing GR more effectively on the surface of ZVI where it will be able to more easily transfer electrons from ZVI to contaminants such as PCE. Therefore, the goal of this research was to determine the feasibility of electrochemically depositing green rust on zero-valent iron and to characterize it in terms of its composition, crystal properties and amount produced. XRD analysis was conducted to determine composition and crystal properties and a procedure was developed to measure the amount produced. Equipment was constructed to deposit green rust electrochemically onto ZVI. A chain of experiments with varying voltage, pH, time and amounts of ZVI were conducted to determine feasible experimental conditions for GR formation. Then, a method was developed to accurately measure the amount of surface oxides of iron deposited on the zero-valent iron substrate. This method was tested and found useful for measuring iron in: i) standard solutions of soluble iron with different concentrations of reagents; ii) suspensions with solid iron hydroxides by themselves; and iii) suspensions with solid iron hydroxides and ZVI. Electrochemical experiments were conducted and the amounts of iron hydroxides deposited on the ZVI surface were measured. XRD analysis of the deposits on the surface was conducted and the patterns of XRD-peaks were compared to that of type 2 – sulfate green rust.
459

Level-set RANS method for sloshing and green water simulations

Yu, Kai 10 October 2008 (has links)
An interface-preserving level set method is incorporated into the Reynolds- Averaged Navier-Stokes (RANS) numerical method for the time-domain simulation of green water effects. This generalized method can be used to evaluate two- and three-dimensional, laminar and turbulent, free surface flows in moving non-orthogonal grids. In the method, free surface flows are modeled as immiscible two-phase (air and water) flows. A level set function is used to mark the individual fluids and the free surface itself is represented by the zero level set function. The level set evolution equation is coupled with the conservation equations for mass and momentum, and solved in the transformed plane. Chimera domain decomposition technique is employed to handle embedding, overlapping, or matching grids. To demonstrate the feasibility of the method, calculations are performed in several bench mark free surface flows including dam break flows, free jets, solitary wave propagations and the impingement of dam break flow on a fixed structure. The comparisons between the simulations and the experimental data provide a thorough validation of the present method. The results also show the potential capability of level-set RANS method in much more complicated free surface flow simulations. After validations, the method is applied to simulate sloshing flows in LNG tank and green water over the platform. In sloshing flows, the level-set RANS method captures the large impact pressure accurately on LNG tank walls. It also generates a plunging breaker successfully in front of a platform in the numerical wave tank. The good agreements between numerical and experimental results prove the level set RANS method is a powerful and accurate CFD methodology in free surface flow simulations.
460

Study of Green Management Continuity from Parent companies to Joint Ventures - Case Study of two Petrochemical companies

Jung, Pei 13 August 2008 (has links)
The Industrial Revolution which began at the end of the 18th century opened a new chapter in human history. Since the steam engine was invented by Watt, technology advances and innovations have taken place continuously. This has brought unprecedented prosperity to mankind. However, highly developed technology has led to environmental pollution and an damage the natural ecology and human life. The issue is only now attracting attention. In the face of undeniable environmental damage, every large petrochemistry company has realized that the trend toward greater environmental responsibility cannot be ignored and needs to be seriously considered. Due to global complications, however, there are different priorities and strategies among countries in th way their enterprises approach environmental protection issues. This research paper is focused on the continuity of green management from multi-national oil corporations down to the joint-venture subsidiaries. Two JV subsidiaries and three parent companies are included in this study. This research is based on a non-quantitative study, by means of face-to-face interviews and information collection, in an attempt to understand the policy details and implementation of green management continuity from parent companies to their subsidiaries. This research tackles the following issues: (1) How the multi-national oil corporations extend and control the green management of their subsidiaries (2) Differences among the multinational oil corporations regarding green management (3) Comparing multinational oil corporations, how local oil companies control the green management of their subsidiaries (4) Where Petrochemical industry corporations manage environmental protection and safety within the same department, what is the degree of interaction between these two functions The search has revealed: (1) In terms of influence on environmental protection implementation, the local environmental regulation are obviously more influential than the direction handed down by the parent companies of multi-national corporations. (2) In terms of influence on environmental protection implementation, the influence of local neighborhood consciousness is also greater than that exercised by the parent companies of multi-national corporations. (3) In term of green management control and coordination with subsidiaries, multi-national corporations are made adept than local companies. (4) Multi-national corporations handle environmental protection issues based on risk management (5) Multi-national corporations emphasis safety before environmental protection issues.

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