12,690 research outputs found

    THE ASEAN-5 FUTURE CURRENCY: MAASTRICHT CRITERIA

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    In this recent decade, many of the economists and policymakers attempted to investigate the suitability of the East Asian region to form a currency union and based on the European countries experience as a benchmark. This study aims to investigate the long-run real convergence in GDP per capita growth among Malaysia, Thailand, Singapore, Indonesia, and the Philippines, over 1978 to 2004. The Dickey-Fuller (DF) and Augmented Dickey-Fuller (ADF) unit root tests were conducted at first difference of GDP per capita for each country; the results demonstrated that all countries GDP per capita are stationary at first difference. The results of the Bound Testing Approach (Auto-Regression Distributed Lag (ARDL)) indicated that there is a long run relationship between variables in the Maastricht Criteria. The results showed that interest rate, inflation rate and the debt ratio experience that negative relationship to the GDP per capita. However, the exchange rate and surplus (or deficit) ratio shown the positive related to the GDP per capita. Therefore, the findings showed the ASEAN 5 countries have fulfilled the Maastricht Criteria with consistent to expected sign(s) except for Singapore’ exchange rate and Indonesia’s debt ratio. Hence, those ASEAN 5 countries in this study have potential to form a single currency.Monetary Union (MU), Bound Test (ARDL), Maastricht Criteria, Single Currency

    Hypervelocity Star Candidates in the SEGUE G & K Dwarf Sample

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    We present 20 candidate hypervelocity stars from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) G and K dwarf samples. Previous searches for hypervelocity stars have only focused on large radial velocities; in this study we also use proper motions to select the candidates. We determine the hypervelocity likelihood of each candidate by means of Monte Carlo simulations, considering the significant errors often associated with high proper motion stars. We find that nearly half of the candidates exceed their escape velocities with at least 98% probability. Every candidate also has less than a 25% chance of being a high-velocity fluke within the SEGUE sample. Based on orbits calculated using the observed six-dimensional positions and velocities, few, if any, of these candidates originate from the Galactic center. If these candidates are truly hypervelocity stars, they were not ejected by interactions with the Milky Way's supermassive black hole. This calls for a more serious examination of alternative hypervelocity-star ejection scenarios.Comment: 8 pages, 5 figures, published in ApJ, this version includes all figures as intende

    A Novel Concept for a Positron Emission Tomography Scanner

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    Positron Emission Tomography (PET) allows physicians and researchers to visualize metabolic data in the human body and is widely used in cancer and neurological imaging. Traditional PET scanners consist of a thin ring of scintillators coupled to photo detectors but these scanners often take long periods of time to acquire an image, are very costly, and are too complex to fit inside other machinery such as MRI. In response to this, we are building a novel PET detector that utilizes non-traditional scintillators and photo detectors in an attempt to significantly decrease cost, allow combined PET/MRI modalities and reduce scan time
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