654 research outputs found
Fatigue Crack Growth Prediction for generalized fiber metal laminates and hybrid materials
No full textThe excellent durability performance of Glare, a thin fiber metal laminate (FML) material system, is now being proven in service. This has motivated work towards the application of FMLs to thicker structures driven by damage tolerance. In order to fully characterize the crack growth life of such materials, models are necessary that can account for the unique aspects of material systems under consideration, including non-uniformity of composition and stress states, and the resulting complex damage state involved in fatigue crack growth. This thesis presents a generalized analytical model for the prediction of fatigue crack and delamination growth in FMLs of arbitrary lay-up, including differing metal alloys, different thickness layers, and different combinations of reinforcing composite layers. Cracks in each layer, and delaminations in each interface, are allowed to grow separately, with the interactions of the damage throughout the laminate taken into account. The model is structured in a modular and iterative fashion. Modules for determining the load redistribution around damage and the strain energy release rate of delamination have been derived and independently validated through comparison to finite element analyses. A series of tests with thick fiber metal laminates of varied construction was carried out to verify the overall crack growth predictions of the model. While some discrepancies between the results and predictions for the most complex laminates suggest that refinement of the delamination strain energy release rate formulation is needed, many of the test results were accurately predicted, demonstrating the suitability of this model for use in design and analysis of thick FML structures.Structural IntegrityAerospace Engineerin
Project Jade Weser Port: A feasibility study
No full textTogether with the amount of transported containers, the size of the container vessels increases. With the size of the ships their draught also becomes larger. At the moment Germany does not have a harbour, suitable to receive these large container vessels. The idea has risen to design and construct a new deep-water port. The authorities took some time contemplating where this port has to be built. Wilhelmshaven versus Cuxhaven was the dilemma. Finally, in March 2001, a temporary decision was made: a new deepwater port is to be built near Wilhelmshaven. One of the strongest points of the area near Wilhemshaven is the great possibilities for future expansion. The scope of this report is limited to the design of a deepwater port near the Wilhelmshaven: the Jade Weser Port. The Jade estuary is very suitable as a harbour, having a natural deep-sea channel and being situated close to open sea. Besides that, a large area is available for the terminal and the infrastructure on land has good possibilities for expansion. For a project, as great as the Jade Weser Port, several studies have to be done. The economic situation is one of the first studies that should be done. The Jade Weser Port studies into this subject are not widely available. This leads to the first question: Is the Jade Weser Port economically/financial feasible? Ballast Nedam has also done research into the future Jade Weser Port. Because of this research the design of the quay in the feasibility study gave reason to Ballast Nedam Dredging for some questions. The quay wall is not protected from waves and currents and there are no breakwaters to protect the berths. The quay lies parallel to the approach channel, just a couple of hundred meters away from it. This situation has led to the following question: Does the unprotected quay lead to any nautical or operational difficulties? If so, is there not a better option for the layout of the quay? The objective of this thesis study is to answer the questions that are outlined in the problem description above. This is done in the following studies: Financial/economical study Nautical/hydraulic study This report is a feasibility study for the Jade Weser Port. This feasibility study consists of five parts. First a study on the location and environmental aspects of the Jade Weser Port has been done, secondly a financial study has been done and after that the preliminary design aspects of the port are described. At last the currents, waves and navigation in and around the port are analysed. The feasibility study is concluded with the conclusions and recommendations for the new port. The results for the port can be presented by the following remarks: The financial feasibility study of the port does not show very encouraging results, although a definitive negative advice can not be given. The nautical feasibility study of the port does show promising results. The circumstances can be rough, but this will not result in much downtime.Hydraulic EngineeringCivil Engineering and Geoscience
RETRACTED: Impact of Green Marketing Practices on Customer Satisfaction among the Leather Industries’ Customers
No full text Retraction Notice: Kushwaha, G.S., & Kumar, A. (2014). ‘Impact of Green Marketing Practices on Customer Satisfaction among the Leather Industries Customers’, Asia-Pacific Journal of Management Research and Innovation, 10(1), 79–88. has been retracted because of the following reasons: 1. The APJMRI article contains unattributed overlap with material from the following article: S. Sivesan, S. Achchuthan & R. Umanakenan (2013). ‘Green Marketing Practices and Customer Satisfaction: A Special Reference to Leather Goods’, Global Journal of Management and Business Research, 13(3), Version 1.0 Year 2013, Online ISSN: 2249-4588 & Print ISSN: 0975-5853. 2. It has been brought to the Publisher’s notice that Dr G.S. Kushwaha’s name was included as the author of the APJMRI article without his permission. The Editor of Asia-Pacific Journal of Management Research and Innovation and the Publisher extend their sincere apology to Dr Sivesan, Dr Achchuthan, Dr Umanakenan and Dr Kushwaha. The main purpose of this study is to find out the impact of green marketing practices on customer satisfaction among the leather industries’ customers. Primary and secondary data were used for this study. Primary data were collected through the questionnaire. Secondary data were collected from texts, journals and magazines. Further, the research design of this study is based on quantitative method. In this study, the quantitative research was used to answer the research question as ‘what extent green marketing practices influence on the customer satisfaction in the Indian context?’ Based on the overall study, green marketing practices are positively associated with customer satisfaction. And also, dimensions in the green marketing practices as green issues in product, price, promotion and place have the significant relationship with customer satisfaction. Meantime, green marketing practices has the significant impact on customer satisfaction. Organisations in the hyper competitive environment can utilise the promotional strategies to induce the customer attitudes in the green issues. In this context, usually people perceive that green issue has high promotion, which is supported by our analysis shows that the promotion and quality of good service are important factors in the consumer’s decision to buy the product. Although the model is the original and unique, it is based on established theories and models. It provides a well-supported explanation of the green marketing to increase the customer satisfaction that should be a useful to manufactures and those who encourage and guide them. </jats:p
The Undular Hydraulic Jump: On a numerical method for the computation of flows with curved streamlines
No full textFrom the theory composed of the method of characteristics and the set of all possible continuous ancillary conditions a closed theory is formed by introducing step functions together with overall mass and momentum conservation equations. However, this representation cannot be called realistic when the jump has the form of the undular hydraulic jump. The objective of the present study may novw be stated as follows: 1. to provide a closed and realistic theory which is able to describe the short wave radiation behind the hydraulic jump; 2. to investigate the reality of the usual "closure" of the quasi-linear wave theory, by proceeding to the next approxilnation that is provided by 1. As these aims are to be attained using a digital machine, they imply the construction of a closed and realistic numerical theory that will provide "contradictory" results under those conditions that provide instability in the hydraulic jump, manifest as some breaking-down of the short wave motion into turbulent motion.Hydraulic EngineeringCivil Engineering and Geoscience
A Study on Microencapsulation of Peltophorum Ferrugineum Flower Extract
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Harnessing high altitude solar power
Full text linkAs an intermediate solution between Glaser's satellite solar power (SSP) and ground-based photovoltaic (PV) panels, this paper examines the collection of solar energy using a high-altitude aerostatic platform. A procedure to calculate the irradiance in the medium/high troposphere, based on experimental data, is described. The results show that here a PV system could collect about four to six times the energy collected by a typical U.K.-based ground installation, and between one-third and half of the total energy the same system would collect if supported by a geostationary satellite (SSP). The concept of the aerostat for solar power generation is then briefly described together with the equations that link its main engineering parameters/variables. A preliminary sizing of a facility stationed at 6 km altitude and its costing, based on realistic values of the input engineering parameters, is then presented
Science in the Third Dimension of R&D
Full text linkWe study a Schumpeterian model of long-run growth with endogenous fertility and with three interacting dimensions of innovation. Scientific research is the fundamental dimension of innovation that creates new technological knowledge. This is allocated over new working prototypes in the horizontal dimension. New firms finance scientific research by obtaining the property rights of new working prototypes, and existing firms invest in developing the blueprint mode of working prototypes into the more productive modes of production in the vertical dimension. Balanced growth in the standards of living is fully endogenous without scale effects, and a new parameter, i.e., the elasticity of scientific knowledge with respect to existing collective scientific knowledge, nonlinearly accelerates long-run growth. With exogenous population growth, the model generates a semi-endogenous result due to the endogenously determined bound on technological opportunity.Science; Technology; Blueprints; R&D; Endogenous Fertility
Diskitis in toddlers revisited
No full text[No abstract available]Brown R, 2001, J BONE JOINT SURG BR, V83B, P106, DOI 10.1302-0301-620X.83B1.10865; CRAWFORD AH, 1991, CLIN ORTHOP RELAT R, P70; CUSHING AH, 1993, CLIN INFECT DIS, V17, P1; Date AR, 2006, ARCH DIS CHILD, V91, P116, DOI 10.1136-adc.2005.080804; HENSEY OJ, 1983, ARCH DIS CHILD, V58, P983; Karabouta Z, 2005, ACTA PAEDIATR, V94, P1516, DOI 10.1080-0803525051003159311
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