17,871 research outputs found

    Stress analysis and fatigue life prediction of a wobble-plate

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    A five-stage compressor for compressing natural gas is being designed and evaluated. The compressor operates at 1500 rpm with natural gas pressure of 50 psi. This study examines deformation behavior, stress and strain distribution of the wobble plate component of the compressor. Fatigue loading on the wobble plate is computed from the reaction of compressed gas in each of the five cylinders. The highest pressure in the 5th cylinder is 3000 psi. The calculated stress evolution per revolution of the wobble plate is utilized to predict the fatigue lives of the wobble plate. The fatigue life prediction is performed using Brown-Miller algorithm with Morrow mean stress correction method. Results show that the stress is concentrated in the vicinity of the contact region between the guide plate and the polymer guide ball. The highest stress in the wobble plate and the polymer guide ball is 160.4 MPa and 127.8 MPa respectively. The corresponding predicted fatigue life of the wobble plate is 8x108 cycles. A higher stress gradient in the guide ball (max von Mises stress is 3.3 GPa) is predicted when a harder steel ball is employed. This is due to high stiffness of the mating plate/ball surfaces

    Differences between supplier development programme of foreign and local Malaysian automotive suppliers

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    Research into supplier development has raised issues on the buyer’s relationship with the supplier.A buyer with collaborative relationship would have more interest in supplier development.From the viewpoint of the suppliers, buyers who provided assistance could help the suppliers in developing their capability, a situation that might be particularly relevant in developing and emerging countries. The automotive manufacturers have implemented supplier development programmes for their suppliers, both in developed and developing countries.This raises a question on supplier development programmes in developing countries: How do supplier development programmes differ between a local (Malaysian) supplier and a foreign (non-Malaysian) supplier for Malaysian automakers (buyers)? In this research, interviews were conducted at three supplier organisations, of which one was Australian and two were Malaysian, where all three were suppliers for a Malaysian automaker.This study found that the Malaysian and Australian suppliers differed in supplier categories, customisation versus standardised products and buyer involvement.The study suggests that buyer differences with regard to supplier relationship, supplier commitment, type of product and size of supplier organisation play a role in supplier development

    Basel III: Implications of Capital and Liquidity Regulations on Financial Stability during Economic Depression.

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    The dynamic global financial system has made it necessary to implement adequate regulatory measures that can effectively guarantee financial stability at the national and international levels. This thesis consists of three self-contained analytical chapters that focus on the effectiveness of evolving financial regulations in addressing systemic risk within the financial system. Despite numerous regulatory reforms introduced following the 2008 GFC, they are still concerns over the role of these regulations in mitigating complex issues related to systemic risk. The first study focuses on international and national regulatory frameworks in the context of conventional, hybrid, and Islamic banking. It analyses the guidance provided by the Basel Committee on Banking Supervision (BCBS) and the Islamic Financial Services Board (IFSB) and examines the differences in the treatment of credit, liquidity, and systemic risk across four countries. The IFSB converts BCBS guidance to ensure compliance with Sharia principles for Islamic banks. Further insights show variations in liquidity and capital requirements imposed on banks in different countries, highlighting the need for countryspecific regulations to address the unique risks. The second study uses data from emerging market economies to investigate the relationship between capital and liquidity regulations under Basel III and their impact on default risk and systemic risk. The study addresses whether the new liquidity and capital requirements, such as the net stable funding ratio and higher capital adequacy ratio, contribute to alleviating the default risk and systemic risk in emerging market economies. The third study focuses on the relationship between credit and liquidity risks and their impact on bank default risk. It also addresses the effect of bank liquidity creation on systemic risk across different types of banks. The findings suggest that while credit and liquidity risks are positively related, no significant relationship exists. The impact of credit and liquidity risks on bank default risk is significant for conventional and hybrid banks, while bank size and capital adequacy ratio play a greater role in the stability of Islamic banks. The joint interaction between credit and liquidity risk negatively influences banking stability. The key findings demonstrate that Basel III's liquidity requirements, such as the Net Stable Funding Ratio (NSFR), play an important role in forecasting banks' default probability and mitigating systemic risk. The insights gathered emphasise the importance of incorporating new mitigating measures, including NSFR, leveraging requirements, countercyclical buffers, and globally systemically important institution surcharges to promote financial stability. Additionally, it demonstrates the relevance of liquidity creation in determining bank stability and its implications for systemic risk. This study offers substantial contributions to the growing body of literature by highlighting the differences in regulatory frameworks, the importance of this approach in developing bank risk profiles, and how they are adequately addressed. The study also contributes to understanding how financial stability can be enhanced while reducing systemic liquidity risk. The study shows that banks, regulators, and policymakers must collaborate adequately across all levels to align risk management and improve regulations and guidelines. This includes sharing information and fostering coordination at the international level

    Feature extraction and classification of spam emails

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    Spectral atlases of the Sun from 3980 to 7100 {\AA} at the center and at the limb

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    In this work, we present digital and graphical atlases of spectra of both the solar disk-center and of the limb near the Solar poles using data taken at the UTS-IAP & RIAAM (the University of Tabriz Siderostat, telescope and spectrograph jointly developed with the Institut d'Astrophysique de Paris and Research Institute for Astronomy and Astrophysics of Maragha). High resolution and high signal-to-noise ratio (SNR)CCD-slit spectra of the sun for 2 different parts of the disk, namely for μ\mu~=~1.0 (solar center) \& for μ\mu~=~ 0.3 solar limb) are provided and discussed. While there are several spectral atlases of the solar disk-center, this is the first spectral atlas ever produced for the solar limb at this spectral range. The resolution of the spectra is about \emph{R}~\sim~70 000 (Δλ\Delta\lambda~\sim~0.09 {\AA} with the signal-to-noise ratio (SNR) of 400-600. The full atlas covers the 3980 to 7100 {\AA} spectral regions and contains 44 pages with three partial spectra of the solar spectrum put on each page to make it compact. The difference spectrum of the normalized solar disk-center and the solar limb is also included in the graphic presentation of the atlas to show the difference of line profiles, including far wings. The identification of the most significant solar lines is included in the graphic presentation of the atlas. Telluric lines are producing a definite signature on the difference spectra which is easy to notice. At the end of this paper we present only two sample pages of the whole atlas while the graphic presentation of the whole atlas along with its ASCII file can be accessed via the ftp server of the CDS in Strasbourg via anonymous ftp to cdsarc.u-strasbg.fr ( or via this link \footnote{\url{http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/other/ApSS}}.Comment: Accepted for publication in Ap&SS journal. 11 pages, 10 figures. The full atlas can be accessed via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/other/ApS